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Code as above; Write three functions of order500, order200 and orderNormal respectively, and process their own business logic in the functions respectively. If their own functions cannot be processed, they will return the string nextSuccessor to pass it back, then encapsulate the constructor Chain, pass an object fn into it, and have their own attribute Successor. There are two methods setNextSuccessor and passRequest on the prototype. The method setNextSuccessor specifies the order of nodes in the responsibility chain, and saves the corresponding method to the attribute this.Successor, chainOrder500. SetNextSuccessor (chainOrder200); ChainOrder200. SetNextSuccessor (chainOrderNormal); Specifies the order in the chain, so this.Successor references the order200 method and the orderNormal method, so if chainOrder500.passRequest (1, true, 500) is called for the first time, the order500 method is called, output directly, and chainOrder500.passRequ is called for the second time.众人都笑着表示，一定要把他编进去。那人就呸了一声，骂道：我当是谁？原来是这个混蛋。5.2. 5 Flatness Design Requirements白凡苦笑道：这可是任谁都想不到的，便是下官见了，也目瞪口呆……他将玉米从厨房烟道附近，掀开小瓦爬上房顶，从房顶上借着树枝荡去隔壁家，然后从狗洞钻出去的经过说了一遍。This is a high-speed shutter, which instantly solidifies water droplets.Before proxy!