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                >[success] # AOP -- 鏈式調用實現 ~~~ 1.給Function 封裝方法改變this指向讓其逐級調用 ~~~ ~~~ Function.prototype.after = function( fn ){ var self = this; return function(){ var ret = self.apply( this, arguments ); if ( ret === 'nextSuccessor' ){ return fn.apply( this, arguments ); } return ret; } }; // after 返回的是一個function 但是function 又有afer 方法因此形成鏈式 var order = order500yuan.after( order200yuan ).after( orderNormal ); order( 1, true, 500 ); // 輸出:500 元定金預購,得到 100 優惠券 order( 2, true, 500 ); // 輸出:200 元定金預購,得到 50 優惠券 order( 1, false, 500 ); // 輸出:普通購買,無優惠券 ~~~
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