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小試 JavaScript Promise
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非同步邏輯是寫 JavaScript 逃不掉的複雜課題,古早流行的做法是傳入 Callback 函式當參數,待特定作業完成再呼叫,缺點是串接程序一旦變多,就會出現波動拳式排版,寫到渾然不知身處夢境第幾層: asyncJob1( function () { //Callback 函式: asyncJob1 完成後呼叫 //...... ayncJob2( function () { //Callback 函式: asyncJob2 完成後呼叫 //...... ayncJob3( function...