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//()()写法：后面括号指的是"立即执行一次前面括号里的代码(不只是函数,全部执行一次)"
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(() => {
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const f1 = () => { console.log("---- 执行函数 f1 ----"); };
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const f2 = () => { console.log("---- 执行函数 f2 ----"); };
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console.log("====================== ES6学习 =====================");
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f1();
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f2();
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//其它业务逻辑
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})(); |