Sharing the differences between jquery and js for selecting all functions-JS Tutorial-php.cn

Sharing the differences between jquery and js for selecting all functions

小云云

Release： 2018-01-10 09:24:49

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This article mainly introduces the difference between jquery and js to implement the select all function. Friends in need can refer to it. I hope it can help everyone.

1. Commonly used events in jquery

click(),dbclick()

focus(),blur()

change()

keydown(),keypress(),keyup()

mousedown(),mouseup() mouseenter(),mouseleave() mouseover(),mouseout() mousemove()

2. jquery hanging event

$（“p”）.bind(“event name”, anonymous function to be executed)

$（“p”).unbind(“event name” )

3. jquery implements the select all function (the focus is on using .prop() for attributes instead of .attr())

The code is as follows:

<!DOCTYPE html>
<html>
  <head>
    <meta charset="{utf-8}">
    <title></title>
    <script src="../jquery-3.2.0.js"></script>
  </head>
  <body>
    <form>
      <input type="checkbox" class="all"/>省市<br />
      <input type="checkbox" class="a"/>山东
      <input type="checkbox" class="a"/>山西
      <input type="checkbox" class="a"/>北京
      <input type="checkbox" class="a"/>河北
      <input type="checkbox" class="a"/>江苏
    </form>
  </body>
</html>
<script>
  $(".all").click(function(){
//    alert($(this)[0].checked);//如果选中则返回true;否则返回false
    var a= $(this)[0].checked; //dom对象
//   alert($(this).prop("checked"));
     var a=$(this).prop("checked");//获取jquery对象
//改变子复选框的状态 用prop代替attr，解决了之前用js写出现的bug,但是在源代码中查不到
  $(".a").prop("checked",a); 
  })
</script>

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Compare js select all Code: {For details on 2017-05-03, see Data Access (Multiple Condition Query for Rent a House)}

function quanxuan(a,ff)
{
  var ck = document.getElementsByClassName(ff);
  if(a.checked)
  {
    for(var i=0;i<ck.length;i++)
    {
      ck[i].setAttribute("checked","checked");
    }
  }
  else
  {
    for(var i=0;i<ck.length;i++)
    {
      ck[i].removeAttribute("checked");
    }
  }
}
</script>

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In addition, jquery can replace all functions of js, except settimeout and setinterval.

Related recommendations:

Use Javscript to implement the all-select function of form check boxes_Form special effects

Write one with jquery checkbox——Similar to the mailbox select all function_jquery

Simple Jquery select all function_jquery

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