Examples to explain how jQuery implements html two-way binding function-JS Tutorial-php.cn

Examples to explain how jQuery implements html two-way binding function

小云云

Release： 2017-12-27 09:19:19

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This article mainly introduces the two-way binding function of jQuery to realize html, and involves the operation skills related to jQuery's event binding for HTML page elements. Friends in need can refer to it. I hope it can help everyone.

The example in this article describes how jQuery implements the two-way binding function of html. Share it with everyone for your reference, as follows:

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript" src="jquery-1.9.1.js"></script>
<script>
var user = new User(&#39;123&#39;);
$(function(){
user.set( "name", "99" );
});
 function GetData() {
  alert(user.attributes.name);
 }
function DataBinder( object_id ) {
 var pubSub = jQuery({});
 var data_attr = "bind-" + object_id,
   message = object_id + ":change";
 jQuery( document ).on( "change", "[data-" + data_attr + "]", function( evt ) {
  var $input = jQuery( this );
  pubSub.trigger( message, [ $input.data( data_attr ), $input.val() ] );
 });
 pubSub.on( message, function( evt, prop_name, new_val ) {
  jQuery( "[data-" + data_attr + "=" + prop_name + "]" ).each( function() {
   var $bound = jQuery( this );
   if ( $bound.is("input, textarea, select") ) {
    $bound.val( new_val );
   } else {
    $bound.html( new_val );
   }
  });
 });
 return pubSub;
}
function User( uid ) {
 var binder = new DataBinder( uid ),
   user = {
    attributes: {},
    set: function( attr_name, val ) {
     this.attributes[ attr_name ] = val;
     binder.trigger( uid + ":change", [ attr_name, val, this ] );
    },
    get: function( attr_name ) {
     return this.attributes[ attr_name ];
    },
    _binder: binder
   };
 binder.on( uid + ":change", function( evt, attr_name, new_val, initiator ) {
  if ( initiator !== user ) {
   user.set( attr_name, new_val );
  }
 });
  return user;
 }
</script>
</head>
<body>
<input type="text" data-bind-123="name" /><br/>
<input type="button" onclick="GetData();" value="获取数据"></p>
</body>
</html>

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