trigger
描述 (Description)
它调用给定事件的回调函数。
语法 (Syntax)
object.trigger(event,[args])
参数 (Parameters)
event - 它绑定一个对象。
args - 它将值/参数传递给回调函数。
例子 (Example)
<!DOCTYPE html>
<html>
<head>
<title>Event Trigger Example</title>
<script src = "https://code.jquery.com/jquery-2.1.3.min.js"
type = "text/javascript"></script>
<script src = "https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.2/underscore-min.js"
type = "text/javascript"></script>
<script src = "https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.1.2/backbone-min.js"
type = "text/javascript"></script>
</head>
<body>
<script type = "text/javascript">
//Created an object 'myVal' and extended it using Backbone.Events method
var myVal = _.extend({title:'IoWiki!!!', site:'www.iowiki.com'}, Backbone.Events);
//The on() method will bind the callback function to an object
myVal.on('myFunc', function () {
document.write("The triggered value for site is: ");
document.write(this.site); //value of site will get displayed by referring the current object
});
// The trigger() method triggers the 'myFunc' event on 'myVal'
myVal.trigger('myFunc');
</script>
</body>
</html>
输出 (Output)
让我们执行以下步骤来查看上述代码的工作原理 -
将以上代码保存在trigger.htm文件中
在浏览器中打开此HTML文件。
