自己动手实现jQuery Callbacks完整功能代码详解

                        {
                            break;
                        }
                    }
                }

                firedTimes++;

                if ( ops.memory )
                {
                    lastArgs = args;
                }

                return this;
            };
        };
 

 测试函数如下：（注意fn1 fn2是匿名函数， fn2返回false , fn3是有“名”函数）

 
 var fn1 = function ( v )
        {
            console.log( ‘fn1 ‘ + ( v || ” ) );
        };

        var fn2 = function ( v )
        {
            console.log( ‘fn2 ‘ + ( v || ” ) );
            return false;
        };

        function fn3( v )
        {
            console.log( ‘fn3 ‘ + ( v || ” ) );
        };
 

 1 . 测试add & fire

var cb=new MyCallbacks();

cb.add(fn1)

cb.add(fn2)

cb.add(fn3)

cb.fire(‘hello’)

输出：

fn1 hello
fn2 hello
fn3 hello
2.测试remove
var cb=new MyCallbacks();

cb.add(fn1)

cb.add(fn2)

cb.add(fn3)

cb.remove(fn1)
cb.fire(‘hello’)
cb.remove(fn3)
cb.fire(‘hello’)