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Examples to explain how jQuery implements html two-way binding function
- 小云云Original
- 2017-12-27 09:19:191906browse
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('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"></p>
</body>
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