Example of js monitoring real-time changes in input input box value

1. Bind oninput and onporpertychanger events to the element at the same time

Example:

<script type="text/JavaScript">
function aa(e){alert("inputting!!");}
</script>
 
<input type="text" id="a" oninput="aa(event)" onporpertychange="aa(event)" />

2. Use native js to add listening events

<script type="text/javascript">
 $(function(){
if("\v"=="v"){//true为IE浏览器，感兴趣的同学可以去搜下，据说是现有最流行的判断浏览器的方法
document.getElementById("a").attachEvent("onporpertychange",function(e){
console.log("inputting!!");
}
}else{
document.getElementById("a").addEventListener("onporpertychange",function(e){
console.log("inputting!!");
}
}
});
</script>
<input type="text" id="a"/>

3. Use the jQuery method to bind events

<script type="text/javascript">
 $(function(){
$("#a").bind(&#39;input porpertychange&#39;,function(){
console.log("e");
});
});
</script>
<input type="text" id="a"/>

After listening to onpropertychange After the event, you can use the event's propertyName attribute to get the changed property name, event.propertyName

Instance 1:

Example 2:

$("#name").bind('input porpertychange',function(){
    var thisTxt=$("#name").val();
    $(this).siblings("p").html(thisTxt)
  })

Example 3:

//手机号码分段显示
register.phonePropertychange = function() {
  _this = register;
  _input = $(this);
  var v = $(this).val();
  v = v.replace(new RegExp(/ /g),'');
  var v1 = v.slice(0,3);
  var v2 = v.slice(3,7);
  var v3 = v.slice(7,11);
  if(v2==''){
    _input.focus().val(v1);
  }else if(v3==''){
    _input.focus().val(v1+' '+v2);
  }else{
    _input.focus().val(v1+' '+v2+ ' '+v3);
  };
  
  //手机号输入完成字体颜色改变
  if (v.length === 11) {
    if(_this.regexpPhone(v)){
      _input.css('color','#000');
      $('#btnSendCode').addClass('c-26a949');
      _input.blur();;
    }else{
      layer.open({content: '手机号码不正确，请重新输入',time: 2, end:function(){
        _input.val('');
      }});
    }
  }else{
    _input.css('color','#26a949');
  }
}
 
//验证手机号
register.regexpPhone = function(phone){
  return /^1[3|4|5|7|8]\d{9}$/.test(phone);
}

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