Promise

點擊打開連接 javascript 語法：java new Promise(function(resolve,reject){...}/*executor*/); Promise構造函數執行時當即調用executor函數，resolve和reject兩個函數做爲參數傳遞給executor（executor函數在Promise構造函數返回新建對象前被調用）。resolve和reject函數被調用時，

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