javaScript中关于this之软绑定应用

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>this之软绑定</title>
</head>
<body>
<script type="text/javascript">
// 软绑定
if (!Function.prototype.softBind) {
    Function.prototype.softBind = function(obj) {
        var fn = this;
        // 捕获所有 curried 参数
        var curried = [].slice.call( arguments, 1 );
        
        var bound = function() {
            return fn.apply(
            (!this || this === (window || global)) ? obj : this,
                curried.concat.apply( curried, arguments )
            );
        };
        bound.prototype = Object.create( fn.prototype );
        return bound;
    };
}

var name1 = { name: 'agugua' };
var name2 = { name: 'LiMing' };

function showName(){
    console.log('My name is '  + this.name)
}

//未软绑定
name2.showName = showName;
name2.showName();                   // My name is LiMing"

//软绑定
name2.showName = showName.softBind(name1);
setTimeout(name2.showName, 60);       // My name is agugua 

</script>
</body>
</html>
javaScript中关于this之软绑定应用

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