h5实现slider滑块功能及样式自定义 – IT老五

公司最近人手不足，于是，又开始折腾起Html来了
本文主要讲slider滑块的实现、样式自定义、刻度绘制、与输入框的联动

我们先来看看效果图

h5 slider.gif

上图中，我们需要实现的难点就是那个绿色的滑块，其它都是输入框及文本框，容易实现。

滑块的实现

其实，只要设置input的type，即可实现滑块功能

<input <span class="hljs-keyword">id</span>=<span class="hljs-string">"slider"</span> type=<span class="hljs-string">"range"</span> min=<span class="hljs-string">"0"</span> max=<span class="hljs-string">"550"</span> step=<span class="hljs-string">"1"</span> /> <span class="hljs-comment">// step表示滑动的最小步长</span>

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<input <span class="hljs-keyword">id</span>=<span class="hljs-string">"slider"</span> type=<span class="hljs-string">"range"</span> min=<span class="hljs-string">"0"</span> max=<span class="hljs-string">"550"</span> step=<span class="hljs-string">"1"</span>  /> <span class="hljs-comment">// step表示滑动的最小步长</span>

效果如下：

range.jpg

样式自定义

虽然实现了滑块的效果，但是感觉有点太丑了，主要是和设计相差太远，于是，我们来美化下，先看看css

<span class="hljs-comment">/** * @range.css **/</span> <span class="hljs-selector-class">.ne-range_thumb</span>, <span class="hljs-selector-tag">input</span><span class="hljs-selector-class">.ne-range</span><span class="hljs-selector-attr">[type=range]</span><span class="hljs-selector-pseudo">::-webkit-slider-thumb</span> { <span class="hljs-attribute">width</span>: <span class="hljs-number">2em</span>; <span class="hljs-attribute">height</span>: <span class="hljs-number">2em</span>; <span class="hljs-attribute">border-radius</span>: <span class="hljs-number">50%</span>; <span class="hljs-attribute">border</span>: <span class="hljs-number">0</span><span class="hljs-comment">/**1px solid #45bd5c*/</span>; <span class="hljs-attribute">background-color</span>: <span class="hljs-number">#5cdf84</span>; <span class="hljs-attribute">box-shadow</span>: <span class="hljs-number">0</span> <span class="hljs-number">1px</span> <span class="hljs-number">4px</span> <span class="hljs-built_in">rgba</span>(0, 0, 0, 0.21); <span class="hljs-attribute">-webkit-transition</span>: border-color <span class="hljs-number">0.15s</span>, background-color <span class="hljs-number">0.15s</span>; <span class="hljs-attribute">transition</span>: border-color <span class="hljs-number">0.15s</span>, background-color <span class="hljs-number">0.15s</span>; <span class="hljs-attribute">cursor</span>: pointer; <span class="hljs-attribute">background-clip</span>: padding-box; <span class="hljs-attribute">box-sizing</span>: border-box; } <span class="hljs-selector-class">.ne-range_thumb</span><span class="hljs-selector-pseudo">:active</span>, <span class="hljs-selector-tag">input</span><span class="hljs-selector-class">.ne-range</span><span class="hljs-selector-attr">[type=range]</span><span class="hljs-selector-pseudo">::-webkit-slider-thumb</span><span class="hljs-selector-pseudo">:active</span> { <span class="hljs-attribute">border</span>: <span class="hljs-number">0</span><span class="hljs-comment">/**1px solid #45bd5c*/</span>; <span class="hljs-attribute">background-color</span>: <span class="hljs-number">#5cdf84</span>; } <span class="hljs-selector-class">.ne-range_track</span>, <span class="hljs-selector-tag">input</span><span class="hljs-selector-class">.ne-range</span><span class="hljs-selector-attr">[type=range]</span> { <span class="hljs-attribute">width</span>: <span class="hljs-number">100%</span>; <span class="hljs-attribute">height</span>: <span class="hljs-number">8px</span>; <span class="hljs-attribute">border-radius</span>: <span class="hljs-number">8px</span>; <span class="hljs-attribute">margin</span>: .<span class="hljs-number">8em</span> <span class="hljs-number">0</span>; <span class="hljs-attribute">padding</span>: <span class="hljs-number">0</span>; <span class="hljs-attribute">cursor</span>: pointer; <span class="hljs-attribute">border</span>: <span class="hljs-number">0</span>; <span class="hljs-comment">/**background-color: #45bd5c;*/</span> <span class="hljs-attribute">background</span>: <span class="hljs-built_in">-webkit-linear-gradient</span>(#40c35f, #40c35f) no-repeat <span class="hljs-number">#cccccc</span>; <span class="hljs-attribute">background-size</span>: <span class="hljs-number">0%</span> <span class="hljs-number">100%</span>; } <span class="hljs-selector-class">.ne-range_track</span> > <span class="hljs-selector-tag">span</span> { <span class="hljs-attribute">display</span>: block; <span class="hljs-attribute">width</span>: <span class="hljs-number">0%</span>; <span class="hljs-attribute">height</span>: <span class="hljs-number">100%</span>; <span class="hljs-attribute">background-color</span>: <span class="hljs-number">#40c35f</span>; } <span class="hljs-selector-class">.ne-range_tips</span> { <span class="hljs-attribute">position</span>: absolute; <span class="hljs-attribute">margin-top</span>: -<span class="hljs-number">2em</span>; <span class="hljs-attribute">width</span>: <span class="hljs-number">6em</span>; <span class="hljs-attribute">text-align</span>: center; <span class="hljs-attribute">margin-left</span>: -<span class="hljs-number">3em</span>; } <span class="hljs-selector-class">.ne-range_thumb</span> > <span class="hljs-selector-class">.ne-range_tips</span> { <span class="hljs-attribute">margin-left</span>: -<span class="hljs-number">2.15em</span>; } <span class="hljs-selector-class">.ne-range_tips</span> > <span class="hljs-selector-tag">span</span> { <span class="hljs-attribute">position</span>: relative; <span class="hljs-attribute">display</span>: inline-block; <span class="hljs-attribute">padding</span>: <span class="hljs-number">0</span> <span class="hljs-number">3px</span>; <span class="hljs-attribute">min-width</span>: <span class="hljs-number">1.2em</span>; <span class="hljs-attribute">color</span>: white; <span class="hljs-attribute">background</span>: <span class="hljs-built_in">rgba</span>(0, 0, 0, 0.5); <span class="hljs-attribute">border-radius</span>: <span class="hljs-number">3px</span>; <span class="hljs-attribute">text-align</span>: center; } <span class="hljs-selector-class">.ne-range_tips</span> > <span class="hljs-selector-tag">span</span><span class="hljs-selector-pseudo">::after</span> { <span class="hljs-attribute">content</span>: <span class="hljs-string">''</span>; <span class="hljs-attribute">position</span>: absolute; <span class="hljs-attribute">left</span>: <span class="hljs-number">50%</span>; <span class="hljs-attribute">bottom</span>: -<span class="hljs-number">0.25em</span>; <span class="hljs-attribute">margin-left</span>: -<span class="hljs-number">0.3em</span>; <span class="hljs-attribute">border</span>: <span class="hljs-number">0.3em</span> solid <span class="hljs-built_in">rgba</span>(0, 0, 0, 0.5); <span class="hljs-attribute">border-right-color</span>: transparent; <span class="hljs-attribute">border-left-color</span>: transparent; <span class="hljs-attribute">border-bottom</span>: <span class="hljs-number">0</span>; } <span class="hljs-comment">/*Real Range*/</span> <span class="hljs-selector-tag">input</span><span class="hljs-selector-class">.ne-range</span><span class="hljs-selector-attr">[type=range]</span> { <span class="hljs-attribute">position</span>: relative; <span class="hljs-attribute">outline</span>: <span class="hljs-number">0</span>; <span class="hljs-attribute">-webkit-appearance</span>: none <span class="hljs-meta">!important</span>; } <span class="hljs-selector-tag">input</span><span class="hljs-selector-class">.ne-range</span><span class="hljs-selector-attr">[type=range]</span><span class="hljs-selector-pseudo">::-webkit-slider-thumb</span> { <span class="hljs-attribute">-webkit-appearance</span>: none <span class="hljs-meta">!important</span>; } <span class="hljs-comment">/*Virtual Range*/</span> <span class="hljs-selector-class">.ne-range</span> { <span class="hljs-attribute">display</span>: inline-block; <span class="hljs-attribute">position</span>: relative; <span class="hljs-attribute">width</span>: <span class="hljs-number">100%</span>; <span class="hljs-attribute">font-size</span>: <span class="hljs-number">1em</span>; } <span class="hljs-selector-class">.ne-range_thumb</span> { <span class="hljs-attribute">position</span>: absolute; <span class="hljs-attribute">top</span>: <span class="hljs-number">0</span>; <span class="hljs-attribute">margin-left</span>: -<span class="hljs-number">0.85em</span>; } <span class="hljs-selector-class">.ne-range_thumb</span><span class="hljs-selector-class">.ondrag</span> > <span class="hljs-selector-class">.ne-range_tips</span> { <span class="hljs-attribute">visibility</span>: visible; }

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<span class="hljs-comment">/**
* @range.css
**/</span>
<span class="hljs-selector-class">.ne-range_thumb</span>,
<span class="hljs-selector-tag">input</span><span class="hljs-selector-class">.ne-range</span><span class="hljs-selector-attr">[type=range]</span><span class="hljs-selector-pseudo">::-webkit-slider-thumb</span> {
  <span class="hljs-attribute">width</span>: <span class="hljs-number">2em</span>;
  <span class="hljs-attribute">height</span>: <span class="hljs-number">2em</span>;
  <span class="hljs-attribute">border-radius</span>: <span class="hljs-number">50%</span>;
  <span class="hljs-attribute">border</span>: <span class="hljs-number">0</span><span class="hljs-comment">/**1px solid #45bd5c*/</span>;
  <span class="hljs-attribute">background-color</span>: <span class="hljs-number">#5cdf84</span>;
  <span class="hljs-attribute">box-shadow</span>: <span class="hljs-number">0</span> <span class="hljs-number">1px</span> <span class="hljs-number">4px</span> <span class="hljs-built_in">rgba</span>(0, 0, 0, 0.21);
  <span class="hljs-attribute">-webkit-transition</span>: border-color <span class="hljs-number">0.15s</span>, background-color <span class="hljs-number">0.15s</span>;
  <span class="hljs-attribute">transition</span>: border-color <span class="hljs-number">0.15s</span>, background-color <span class="hljs-number">0.15s</span>;
  <span class="hljs-attribute">cursor</span>: pointer;
  <span class="hljs-attribute">background-clip</span>: padding-box;
  <span class="hljs-attribute">box-sizing</span>: border-box;
}
<span class="hljs-selector-class">.ne-range_thumb</span><span class="hljs-selector-pseudo">:active</span>,
<span class="hljs-selector-tag">input</span><span class="hljs-selector-class">.ne-range</span><span class="hljs-selector-attr">[type=range]</span><span class="hljs-selector-pseudo">::-webkit-slider-thumb</span><span class="hljs-selector-pseudo">:active</span> {
  <span class="hljs-attribute">border</span>: <span class="hljs-number">0</span><span class="hljs-comment">/**1px solid #45bd5c*/</span>;
  <span class="hljs-attribute">background-color</span>: <span class="hljs-number">#5cdf84</span>;
}
<span class="hljs-selector-class">.ne-range_track</span>,
<span class="hljs-selector-tag">input</span><span class="hljs-selector-class">.ne-range</span><span class="hljs-selector-attr">[type=range]</span> {
  <span class="hljs-attribute">width</span>: <span class="hljs-number">100%</span>;
  <span class="hljs-attribute">height</span>: <span class="hljs-number">8px</span>;
  <span class="hljs-attribute">border-radius</span>: <span class="hljs-number">8px</span>;
  <span class="hljs-attribute">margin</span>: .<span class="hljs-number">8em</span> <span class="hljs-number">0</span>;
  <span class="hljs-attribute">padding</span>: <span class="hljs-number">0</span>;
  <span class="hljs-attribute">cursor</span>: pointer;
  <span class="hljs-attribute">border</span>: <span class="hljs-number">0</span>;
  <span class="hljs-comment">/**background-color: #45bd5c;*/</span>
  <span class="hljs-attribute">background</span>: <span class="hljs-built_in">-webkit-linear-gradient</span>(#40c35f, #40c35f) no-repeat <span class="hljs-number">#cccccc</span>;
  <span class="hljs-attribute">background-size</span>: <span class="hljs-number">0%</span> <span class="hljs-number">100%</span>;
}
<span class="hljs-selector-class">.ne-range_track</span> > <span class="hljs-selector-tag">span</span> {
  <span class="hljs-attribute">display</span>: block;
  <span class="hljs-attribute">width</span>: <span class="hljs-number">0%</span>;
  <span class="hljs-attribute">height</span>: <span class="hljs-number">100%</span>;
  <span class="hljs-attribute">background-color</span>: <span class="hljs-number">#40c35f</span>;
}
<span class="hljs-selector-class">.ne-range_tips</span> {
  <span class="hljs-attribute">position</span>: absolute;
  <span class="hljs-attribute">margin-top</span>: -<span class="hljs-number">2em</span>;
  <span class="hljs-attribute">width</span>: <span class="hljs-number">6em</span>;
  <span class="hljs-attribute">text-align</span>: center;
  <span class="hljs-attribute">margin-left</span>: -<span class="hljs-number">3em</span>;
}
<span class="hljs-selector-class">.ne-range_thumb</span> > <span class="hljs-selector-class">.ne-range_tips</span> {
  <span class="hljs-attribute">margin-left</span>: -<span class="hljs-number">2.15em</span>;
}
<span class="hljs-selector-class">.ne-range_tips</span> > <span class="hljs-selector-tag">span</span> {
  <span class="hljs-attribute">position</span>: relative;
  <span class="hljs-attribute">display</span>: inline-block;
  <span class="hljs-attribute">padding</span>: <span class="hljs-number">0</span> <span class="hljs-number">3px</span>;
  <span class="hljs-attribute">min-width</span>: <span class="hljs-number">1.2em</span>;
  <span class="hljs-attribute">color</span>: white;
  <span class="hljs-attribute">background</span>: <span class="hljs-built_in">rgba</span>(0, 0, 0, 0.5);
  <span class="hljs-attribute">border-radius</span>: <span class="hljs-number">3px</span>;
  <span class="hljs-attribute">text-align</span>: center;
}
<span class="hljs-selector-class">.ne-range_tips</span> > <span class="hljs-selector-tag">span</span><span class="hljs-selector-pseudo">::after</span> {
  <span class="hljs-attribute">content</span>: <span class="hljs-string">''</span>;
  <span class="hljs-attribute">position</span>: absolute;
  <span class="hljs-attribute">left</span>: <span class="hljs-number">50%</span>;
  <span class="hljs-attribute">bottom</span>: -<span class="hljs-number">0.25em</span>;
  <span class="hljs-attribute">margin-left</span>: -<span class="hljs-number">0.3em</span>;
  <span class="hljs-attribute">border</span>: <span class="hljs-number">0.3em</span> solid <span class="hljs-built_in">rgba</span>(0, 0, 0, 0.5);
  <span class="hljs-attribute">border-right-color</span>: transparent;
  <span class="hljs-attribute">border-left-color</span>: transparent;
  <span class="hljs-attribute">border-bottom</span>: <span class="hljs-number">0</span>;
}
<span class="hljs-comment">/*Real Range*/</span>
<span class="hljs-selector-tag">input</span><span class="hljs-selector-class">.ne-range</span><span class="hljs-selector-attr">[type=range]</span> {
  <span class="hljs-attribute">position</span>: relative;
  <span class="hljs-attribute">outline</span>: <span class="hljs-number">0</span>;
  <span class="hljs-attribute">-webkit-appearance</span>: none <span class="hljs-meta">!important</span>;
}
<span class="hljs-selector-tag">input</span><span class="hljs-selector-class">.ne-range</span><span class="hljs-selector-attr">[type=range]</span><span class="hljs-selector-pseudo">::-webkit-slider-thumb</span> {
  <span class="hljs-attribute">-webkit-appearance</span>: none <span class="hljs-meta">!important</span>;
}
<span class="hljs-comment">/*Virtual Range*/</span>
<span class="hljs-selector-class">.ne-range</span> {
  <span class="hljs-attribute">display</span>: inline-block;
  <span class="hljs-attribute">position</span>: relative;
  <span class="hljs-attribute">width</span>: <span class="hljs-number">100%</span>;
  <span class="hljs-attribute">font-size</span>: <span class="hljs-number">1em</span>;
}
<span class="hljs-selector-class">.ne-range_thumb</span> {
  <span class="hljs-attribute">position</span>: absolute;
  <span class="hljs-attribute">top</span>: <span class="hljs-number">0</span>;
  <span class="hljs-attribute">margin-left</span>: -<span class="hljs-number">0.85em</span>;
}
<span class="hljs-selector-class">.ne-range_thumb</span><span class="hljs-selector-class">.ondrag</span> > <span class="hljs-selector-class">.ne-range_tips</span> {
  <span class="hljs-attribute">visibility</span>: visible;
}

有点多，说下关键点，thumb相关的是设置滑块按钮（即那个圆点）相关属性，track即那一条滑动条。
需要注意的是下面两行代码

<span class="hljs-selector-tag">background</span>: <span class="hljs-selector-tag">-webkit-linear-gradient</span>(<span class="hljs-selector-id">#40c35f</span>, <span class="hljs-selector-id">#40c35f</span>) <span class="hljs-selector-tag">no-repeat</span> <span class="hljs-selector-id">#cccccc</span>; <span class="hljs-selector-tag">background-size</span>: 0% 100%;

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<span class="hljs-selector-tag">background</span>: <span class="hljs-selector-tag">-webkit-linear-gradient</span>(<span class="hljs-selector-id">#40c35f</span>, <span class="hljs-selector-id">#40c35f</span>) <span class="hljs-selector-tag">no-repeat</span> <span class="hljs-selector-id">#cccccc</span>;
<span class="hljs-selector-tag">background-size</span>: 0% 100%;

background设置了-webkit，因为我这边是针对手机端；-linear-gradient表示线性渐变，括号中两个颜色值都是#40c35f，此时就是纯色的绿色；no-repeat表示背景图像仅出现一次，不会重复出现；最后的#cccccc则定义了右边没有滑到的区域为灰色。
而background-size设置了两个宽度百分比，分别是#40c35f占的百分比和#cccccc占的百分比，这里都是相对于整个滑块区域来讲的。
关于线性渐变，下面一张linear-gradient(#cccccc, #000000)供参考

linear-gradient(#cccccc, #000000).png

说完css，我们在来看看html

<input type=<span class="hljs-string">"range"</span> id=<span class="hljs-string">"slider"</span> name=<span class="hljs-string">"slider"</span> <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-range"</span> value=<span class="hljs-string">"0"</span> style=<span class="hljs-string">"margin-top: 4vw;"</span>/>

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<input type=<span class="hljs-string">"range"</span> id=<span class="hljs-string">"slider"</span> name=<span class="hljs-string">"slider"</span> <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-range"</span> value=<span class="hljs-string">"0"</span> style=<span class="hljs-string">"margin-top: 4vw;"</span>/>

和之前的基本一致，这里没有设置min,max,step等，留在后面js中设置，没什么大的区别

$.fn.RangeSlider = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">cfg</span>) </span>{ <span class="hljs-keyword">this</span>.sliderCfg = { <span class="hljs-attr">min</span>: cfg && !<span class="hljs-built_in">isNaN</span>(<span class="hljs-built_in">parseFloat</span>(cfg.min)) ? <span class="hljs-built_in">Number</span>(cfg.min) : <span class="hljs-literal">null</span>, <span class="hljs-attr">max</span>: cfg && !<span class="hljs-built_in">isNaN</span>(<span class="hljs-built_in">parseFloat</span>(cfg.max)) ? <span class="hljs-built_in">Number</span>(cfg.max) : <span class="hljs-literal">null</span>, <span class="hljs-attr">step</span>: cfg && <span class="hljs-built_in">Number</span>(cfg.step) ? cfg.step : <span class="hljs-number">1</span>, <span class="hljs-attr">callback</span>: cfg && cfg.callback ? cfg.callback : <span class="hljs-literal">null</span> }; <span class="hljs-keyword">var</span> $input = $(<span class="hljs-keyword">this</span>); <span class="hljs-keyword">var</span> min = <span class="hljs-keyword">this</span>.sliderCfg.min; <span class="hljs-keyword">var</span> max = <span class="hljs-keyword">this</span>.sliderCfg.max; <span class="hljs-keyword">var</span> step = <span class="hljs-keyword">this</span>.sliderCfg.step; <span class="hljs-keyword">var</span> callback = <span class="hljs-keyword">this</span>.sliderCfg.callback; $input.attr(<span class="hljs-string">'min'</span>, min) .attr(<span class="hljs-string">'max'</span>, max) .attr(<span class="hljs-string">'step'</span>, step); $input.bind(<span class="hljs-string">"input"</span>, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">e</span>) </span>{ $input.attr(<span class="hljs-string">'value'</span>, <span class="hljs-keyword">this</span>.value); $input.css(<span class="hljs-string">'background-size'</span>, <span class="hljs-keyword">this</span>.value * <span class="hljs-number">100.0</span> / max + <span class="hljs-string">'% 100%'</span>); <span class="hljs-keyword">if</span> ($.isFunction(callback)) { callback(<span class="hljs-keyword">this</span>); } }); }; <span class="hljs-keyword">var</span> change = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">$input</span>) </span>{ <span class="hljs-comment">/*拖动滑块的事件，内容可自行定义*/</span> } $(<span class="hljs-string">'#slider'</span>).RangeSlider({ <span class="hljs-attr">min</span>: <span class="hljs-number">0</span>, <span class="hljs-attr">max</span>: <span class="hljs-number">550</span>, <span class="hljs-attr">step</span>: <span class="hljs-number">1</span>, <span class="hljs-attr">callback</span>: change });

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        $.fn.RangeSlider = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">cfg</span>) </span>{
            <span class="hljs-keyword">this</span>.sliderCfg = {
                <span class="hljs-attr">min</span>: cfg && !<span class="hljs-built_in">isNaN</span>(<span class="hljs-built_in">parseFloat</span>(cfg.min)) ? <span class="hljs-built_in">Number</span>(cfg.min) : <span class="hljs-literal">null</span>,
                <span class="hljs-attr">max</span>: cfg && !<span class="hljs-built_in">isNaN</span>(<span class="hljs-built_in">parseFloat</span>(cfg.max)) ? <span class="hljs-built_in">Number</span>(cfg.max) : <span class="hljs-literal">null</span>,
                <span class="hljs-attr">step</span>: cfg && <span class="hljs-built_in">Number</span>(cfg.step) ? cfg.step : <span class="hljs-number">1</span>,
                <span class="hljs-attr">callback</span>: cfg && cfg.callback ? cfg.callback : <span class="hljs-literal">null</span>
            };

            <span class="hljs-keyword">var</span> $input = $(<span class="hljs-keyword">this</span>);
            <span class="hljs-keyword">var</span> min = <span class="hljs-keyword">this</span>.sliderCfg.min;
            <span class="hljs-keyword">var</span> max = <span class="hljs-keyword">this</span>.sliderCfg.max;
            <span class="hljs-keyword">var</span> step = <span class="hljs-keyword">this</span>.sliderCfg.step;
            <span class="hljs-keyword">var</span> callback = <span class="hljs-keyword">this</span>.sliderCfg.callback;

            $input.attr(<span class="hljs-string">'min'</span>, min)
                .attr(<span class="hljs-string">'max'</span>, max)
                .attr(<span class="hljs-string">'step'</span>, step);

            $input.bind(<span class="hljs-string">"input"</span>, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">e</span>) </span>{
                $input.attr(<span class="hljs-string">'value'</span>, <span class="hljs-keyword">this</span>.value);
                $input.css(<span class="hljs-string">'background-size'</span>, <span class="hljs-keyword">this</span>.value * <span class="hljs-number">100.0</span> / max + <span class="hljs-string">'% 100%'</span>);

                <span class="hljs-keyword">if</span> ($.isFunction(callback)) {
                    callback(<span class="hljs-keyword">this</span>);
                }
            });
        };

        <span class="hljs-keyword">var</span> change = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">$input</span>) </span>{
            <span class="hljs-comment">/*拖动滑块的事件，内容可自行定义*/</span>

        }

        $(<span class="hljs-string">'#slider'</span>).RangeSlider({ <span class="hljs-attr">min</span>: <span class="hljs-number">0</span>, <span class="hljs-attr">max</span>: <span class="hljs-number">550</span>, <span class="hljs-attr">step</span>: <span class="hljs-number">1</span>, <span class="hljs-attr">callback</span>: change });

这里注意，绑定的是 $公式输入有误$ input.css，这里我们改变background-size第一个百分比就可以达到左侧绿色覆盖的目的。
这里就完成了滑块的基本功能。

刻度绘制

但是，离上面效果图还有蛮大差距的。比如上面的刻度，这里我取巧使用了宽度百分比来直接绘制了数字：

<div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-cell-center"</span> style=<span class="hljs-string">"width: 9%"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color: #333333; font-size: 3.2vw"</span>></span>0<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span> <div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-cell-center"</span> style=<span class="hljs-string">"width: 9%"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color: #333333; font-size: 3.2vw"</span>></span>50<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span> <div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-cell-center"</span> style=<span class="hljs-string">"width: 9%"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color: #333333; font-size: 3.2vw"</span>></span>100<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span> <div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-cell-center"</span> style=<span class="hljs-string">"width: 9%"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color: #333333; font-size: 3.2vw"</span>></span>150<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span> <div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-cell-center"</span> style=<span class="hljs-string">"width: 9%"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color: #333333; font-size: 3.2vw"</span>></span>200<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span> <div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-cell-center"</span> style=<span class="hljs-string">"width: 9%"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color: #333333; font-size: 3.2vw"</span>></span>250<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span> <div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-cell-center"</span> style=<span class="hljs-string">"width: 9%"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color: #333333; font-size: 3.2vw"</span>></span>300<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span> <div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-cell-center"</span> style=<span class="hljs-string">"width: 9%"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color: #333333; font-size: 3.2vw"</span>></span>350<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span> <div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-cell-center"</span> style=<span class="hljs-string">"width: 9%"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color: #333333; font-size: 3.2vw"</span>></span>400<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span> <div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-cell-center"</span> style=<span class="hljs-string">"width: 9%"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color: #333333; font-size: 3.2vw"</span>></span>450<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span> <div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-cell-center"</span> style=<span class="hljs-string">"width: 9%"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color: #333333; font-size: 3.2vw"</span>></span>500<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span> <div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-cell-center"</span> style=<span class="hljs-string">"width: 9%"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color: #333333; font-size: 3.2vw"</span>></span>550<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span> <div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"align-right"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"font-size: 2.5vw"</span>></span>单位：毫升(ml)<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span>

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<div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-cell-center"</span> style=<span class="hljs-string">"width: 9%"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color: #333333; font-size: 3.2vw"</span>></span>0<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span>
<div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-cell-center"</span> style=<span class="hljs-string">"width: 9%"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color: #333333; font-size: 3.2vw"</span>></span>50<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span>
<div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-cell-center"</span> style=<span class="hljs-string">"width: 9%"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color: #333333; font-size: 3.2vw"</span>></span>100<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span>
<div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-cell-center"</span> style=<span class="hljs-string">"width: 9%"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color: #333333; font-size: 3.2vw"</span>></span>150<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span>
<div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-cell-center"</span> style=<span class="hljs-string">"width: 9%"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color: #333333; font-size: 3.2vw"</span>></span>200<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span>
<div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-cell-center"</span> style=<span class="hljs-string">"width: 9%"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color: #333333; font-size: 3.2vw"</span>></span>250<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span>
<div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-cell-center"</span> style=<span class="hljs-string">"width: 9%"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color: #333333; font-size: 3.2vw"</span>></span>300<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span>
<div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-cell-center"</span> style=<span class="hljs-string">"width: 9%"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color: #333333; font-size: 3.2vw"</span>></span>350<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span>
<div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-cell-center"</span> style=<span class="hljs-string">"width: 9%"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color: #333333; font-size: 3.2vw"</span>></span>400<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span>
<div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-cell-center"</span> style=<span class="hljs-string">"width: 9%"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color: #333333; font-size: 3.2vw"</span>></span>450<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span>
<div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-cell-center"</span> style=<span class="hljs-string">"width: 9%"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color: #333333; font-size: 3.2vw"</span>></span>500<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span>
<div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-cell-center"</span> style=<span class="hljs-string">"width: 9%"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"color: #333333; font-size: 3.2vw"</span>></span>550<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span>

<div <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"align-right"</span>><span class="xml"><span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ne-label"</span> <span class="hljs-attr">style</span>=<span class="hljs-string">"font-size: 2.5vw"</span>></span>单位：毫升(ml)<span class="hljs-tag"></<span class="hljs-name">label</span>></span></span><span class="xml"><span class="hljs-tag"></<span class="hljs-name">div</span>></span></span>

当然有很多更好的办法，至少可以写个js循环，但是第一次写h5，还是先实现功能再考虑优化吧。
到这里，我们就实现了一个滑块，效果图如下：

slider.jpg

与输入框联动

但是，最初的效果图中，滑块是可以和上方的输入框联动的。于是，我们再定义一个数字输入框：

<input id=<span class="hljs-string">"amount"</span> name=<span class="hljs-string">"amount"</span> <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-input"</span> placeholder=<span class="hljs-string">"只允许输入数字"</span> pattern=<span class="hljs-string">"\d*"</span> type=<span class="hljs-string">"number"</span>>

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<input id=<span class="hljs-string">"amount"</span> name=<span class="hljs-string">"amount"</span> <span class="hljs-class"><span class="hljs-keyword">class</span></span>=<span class="hljs-string">"ne-input"</span> placeholder=<span class="hljs-string">"只允许输入数字"</span> pattern=<span class="hljs-string">"\d*"</span> type=<span class="hljs-string">"number"</span>>

要达到输入框内容跟着滑块变化，我们需要改下上面js中的change方法，让滑块滑动时，改变amount输入框的值

<span class="hljs-keyword">var</span> change = <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-params">($input)</span> </span>{ <span class="hljs-comment">/*拖动滑块的事件，内容可自行定义*/</span> $(<span class="hljs-string">"#amount"</span>).val($input.value); }

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        <span class="hljs-keyword">var</span> change = <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-params">($input)</span> </span>{
            <span class="hljs-comment">/*拖动滑块的事件，内容可自行定义*/</span>
            $(<span class="hljs-string">"#amount"</span>).val($input.value);
        }

然后，当输入框输入数字时，我们的滑块也需要跟着一起移动：

$(<span class="hljs-string">'#amount'</span>).bind(<span class="hljs-string">"input"</span>, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">e</span>) </span>{ <span class="hljs-keyword">var</span> value = <span class="hljs-number">0</span>; <span class="hljs-comment">// 过滤下输入内容，因为个别特殊机型手机在input设置了只能输入数字后还是能输入符号</span> <span class="hljs-keyword">if</span> (<span class="hljs-regexp">/^[1-9][0-9]*/</span>.test(<span class="hljs-keyword">this</span>.value)) { value = <span class="hljs-keyword">this</span>.value; } <span class="hljs-comment">// 这里保证输入最大值为550，与滑块一致</span> <span class="hljs-keyword">if</span> (<span class="hljs-keyword">this</span>.value > <span class="hljs-number">550</span>) { value = <span class="hljs-number">550</span>; $(<span class="hljs-string">"#amount"</span>).val(<span class="hljs-number">550</span>); } <span class="hljs-comment">// 这里设置滑块的值和css</span> $(<span class="hljs-string">"#slider"</span>).val(value).css(<span class="hljs-string">'background-size'</span>, value * <span class="hljs-number">100.0</span> / <span class="hljs-number">550</span> + <span class="hljs-string">'% 100%'</span>); });

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        $(<span class="hljs-string">'#amount'</span>).bind(<span class="hljs-string">"input"</span>, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">e</span>) </span>{
            <span class="hljs-keyword">var</span> value = <span class="hljs-number">0</span>;
            <span class="hljs-comment">// 过滤下输入内容，因为个别特殊机型手机在input设置了只能输入数字后还是能输入符号</span>
            <span class="hljs-keyword">if</span> (<span class="hljs-regexp">/^[1-9][0-9]*/</span>.test(<span class="hljs-keyword">this</span>.value)) {
                value = <span class="hljs-keyword">this</span>.value;
            }
            <span class="hljs-comment">// 这里保证输入最大值为550，与滑块一致</span>
            <span class="hljs-keyword">if</span> (<span class="hljs-keyword">this</span>.value > <span class="hljs-number">550</span>) {
                value = <span class="hljs-number">550</span>;
                $(<span class="hljs-string">"#amount"</span>).val(<span class="hljs-number">550</span>);
            }
            <span class="hljs-comment">// 这里设置滑块的值和css</span>
            $(<span class="hljs-string">"#slider"</span>).val(value).css(<span class="hljs-string">'background-size'</span>, value * <span class="hljs-number">100.0</span> / <span class="hljs-number">550</span> + <span class="hljs-string">'% 100%'</span>);
        });

至此，我们就完成了滑块及相关功能：

h5 slider.jpg

ps：中间虽然还有一些css没有给出，但是都是无关紧要的，比如div的class中ne-cell对应的css，就是一些常规的布局，相信会h5的肯定比我这个刚接触几天时间的人熟悉。另外，刚接触h5，写得有问题的地方多谢指出及纠正。

完成滑块功能时，也是网上找资料，其中主要借鉴了以下博文：
https://blog.csdn.net/u013347241/article/details/51560290

作者：ThinkinLiu
链接：https://www.jianshu.com/p/54fd0f8f8481
來源：简书
简书著作权归作者所有，任何形式的转载都请联系作者获得授权并注明出处。

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