moxunpw
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layui_toolnb


			
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  <div class="layui-col-md9 site-content">
    <h1 class="site-h1"><i class="layui-icon">&#xe631;</i> 工具集文档 - layui.util</h1>
    <blockquote class="site-text layui-elem-quote">
      我们将一些工具性元素放入 <em>util</em> 模块中，以供选择性使用。其内部由多个小工具组件组成，他们也许不是必须的，但很多时候却能为你的页面提供良好的辅助作用。
    </blockquote>
     <blockquote class="site-text layui-elem-quote">
      模块加载名称：<em>util</em>
    </blockquote>
    
    
    <fieldset class="layui-elem-field layui-field-title site-title">
      <legend><a name="fixbar">固定块</a></legend>
    </fieldset> 
    <div class="site-text">
      <p>
        语法：<em>util.fixbar(options)</em>
        <br>其中参数 <em>options</em> 是一个对象，可支持的key如下表：
      </p>
      <table class="layui-table">
        <colgroup>
          <col width="120">
          <col width="120">
          <col>
        </colgroup>
        <thead>
          <tr>
            <th>参数</th>
            <th>类型</th>
            <th>描述</th>
          </tr> 
        </thead>
        <tbody>
          <tr>
            <td>bar1</td>
            <td>Boolean/String</td>
            <td>默认false。如果值为true，则显示第一个bar，带有一个默认图标。<br>如果值为图标字符，则显示第一个bar，并覆盖默认图标</td>
          </tr>
          <tr>
            <td>bar2</td>
            <td>Boolean/String</td>
            <td>默认false。如果值为true，则显示第二个bar，带有一个默认图标。<br>如果值为图标字符，则显示第二个bar，并覆盖默认图标</td>
          </tr>
          <tr>
            <td>bgcolor</td>
            <td>String</td>
            <td>自定义区块背景色</td>
          </tr>
          <tr>
            <td>showHeight</td>
            <td>Number</td>
            <td>用于控制出现TOP按钮的滚动条高度临界值。默认：200</td>
          </tr>
          <tr>
            <td>css</td>
            <td>Object</td>
            <td>你可以通过重置bar的位置，比如 css: {right: 100, bottom: 100}</td>
          </tr>
          <tr>
            <td>click</td>
            <td>Function</td>
            <td>点击bar的回调，函数返回一个type参数，用于区分bar类型。<br>支持的类型有：bar1、bar2、top</td>
          </tr>
          <tr>
        </tbody>
      </table>
      <pre class="layui-code" lay-title="例子">
layui.use('util', function(){
  var util = layui.util;
  
  //执行
  util.fixbar({
    bar1: true
    ,click: function(type){
      console.log(type);
      if(type === 'bar1'){
        alert('点击了bar1')
      }
    }
  });
});
      </pre>
    </div>
    
    <fieldset class="layui-elem-field layui-field-title site-title">
      <legend><a name="countdown">倒计时</a></legend>
    </fieldset> 
    <div class="site-text">
      <p>这是一个精致的封装，它并不负责视图的呈现，而仅返回倒计时数值，这意味着你可以将它应用在任何倒计时相关的业务中。</p>
      <p>
        语法：<em>util.countdown(endTime, serverTime, callback)</em>
      </p>
      <table class="layui-table">
        <colgroup>
          <col width="120">
          <col>
        </colgroup>
        <thead>
          <tr>
            <th>参数</th>
            <th>说明</th>
          </tr> 
        </thead>
        <tbody>
          <tr>
            <td>endTime</td>
            <td>结束时间戳或Date对象，如：4073558400000，或：new Date(2099,1,1).</td>
          </tr>
          <tr>
            <td>serverTime</td>
            <td>当前服务器时间戳或Date对象</td>
          </tr>
          <tr>
            <td>callback</td>
            <td>
              回调函数。如果倒计时尚在运行，则每一秒都会执行一次。并且返回三个参数：
              <em>date</em>（包含天/时/分/秒的对象）、 <em>serverTime</em>（当前服务器时间戳或Date对象）, <em>timer</em>（计时器返回的ID值，用于clearTimeout）
            </td>
          </tr>
        </tbody>
      </table>
      <pre class="layui-code" lay-title="例子">
&lt;div id="test">&lt;/div>
 
&lt;script&gt;
layui.use('util', function(){
  var util = layui.util;
  
  //示例
  var endTime = new Date(2099,1,1).getTime() //假设为结束日期
  ,serverTime = new Date().getTime(); //假设为当前服务器时间，这里采用的是本地时间，实际使用一般是取服务端的
   
  util.countdown(endTime, serverTime, function(date, serverTime, timer){
    var str = date[0] + '天' + date[1] + '时' +  date[2] + '分' + date[3] + '秒';
    layui.$('#test').html('距离2099年1月1日还有：'+ str);
  });
});
&lt;/script&gt;
      </pre>
    </div>
    
    <fieldset class="layui-elem-field layui-field-title site-title">
      <legend><a name="method">其它方法</a></legend>
    </fieldset> 
    <table class="layui-table">
      <colgroup>
        <col width="220">
        <col>
      </colgroup>
      <thead>
        <tr>
          <th>方法</th>
          <th>说明</th>
        </tr> 
      </thead>
      <tbody>
        <tr>
          <td>util.timeAgo(time, onlyDate)</td>
          <td>
            某个时间在当前时间的多久前。
            <br>参数 <em>time</em>：即为某个时间的时间戳或日期对象
            <br>参数 <em>onlyDate</em>：是否在超过30天后，只返回日期字符，而不返回时分秒
            <br>
            <br>如果在3分钟以内，返回：<em>刚刚</em>
            <br>如果在30天以内，返回：<em>若干分钟前</em>、<em>若干小时前</em>、<em>若干天前</em>，如：5分钟前
            <br>如果在30天以上，返回：<em>日期字符</em>，如：2017-01-01
          </td>
        </tr>
        <tr>
          <td>util.toDateString(time, format)</td>
          <td>
            转化时间戳或日期对象为日期格式字符
            <br>参数 <em>time</em>：可以是日期对象，也可以是毫秒数
            <br>参数 <em>format</em>：日期字符格式（默认：yyyy-MM-dd HH:mm:ss），可随意定义，如：yyyy年MM月dd日
          </td>
        </tr>
        <tr>
          <td>util.digit(num, length)</td>
          <td>
            数字前置补零
            <br>参数 <em>num</em>：原始数字
            <br>参数 <em>length</em>：数字长度，如果原始数字长度小于 length，则前面补零，如：util.digit(7, 3) //007
          </td>
        </tr>
        <tr>
          <td>util.escape(str)</td>
          <td>
            转义 xss 字符
            <br>参数 <em>str</em>：任意字符
          </td>
        </tr>
        <tr>
          <td>util.event(attr, obj, eventType)</td>
          <td>
            用于更好地批量处理事件。
            <br>参数 <em>attr</em>：绑定需要监听事件的元素属性
            <br>参数 <em>obj</em>：事件回调链
            <br>参数 <em>eventType</em>：事件类型（默认 click）
            <br><br>示例：
            <pre class="layui-code">
HTML：
&lt;button class="layui-btn" lay-active="e1">事件1&lt;/button>
&lt;button class="layui-btn" lay-active="e2">事件2&lt;/button>
&lt;button class="layui-btn" lay-active="e3">事件3&lt;/button>
 
JavaScript：
&lt;script>
layui.use('util', function(){
  var util = layui.util;
  
  //处理属性 为 lay-active 的所有元素事件
  util.event('lay-active', {
    e1: function(othis){
      alert('触发了事件1');
    }
    ,e2: function(othis){
      alert('触发了事件2');
    }
    ,e3: function(othis){
      alert('触发了事件3');
    }
  });
});
&lt;/script>
            </pre>
          </td>
        </tr>
      </tbody>
    </table>
    
    <fieldset class="layui-elem-field layui-field-title site-title">
      <legend><a name="other">结语</a></legend>
    </fieldset> 
    <div class="site-text">
      <p>工具模块往往应用在边边角角，将不定期增加。</p>
    </div>
    
    <div class="layui-elem-quote">
  <p>layui - 在每一个细节中，用心与你沟通</p>
</div>
    
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