原创  js html双向绑定Demo

分类: 2015-01-09T17:41:38    775人阅读   
<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('123');
$(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"></div>


</body>
</html>
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