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Day47:写出执行结果,并解释原因 #96
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这个没懂,能否解释一下? |
// 答案 // 知识点 // 解析 2)函数提升
3)块级作用域的函数声明 /块级作用域函数声明**/ 如果改变了作用域内声明的函数的处理规则,显然会对老代码产生很大影响。为了减轻因此产生的不兼容问题,es6在附录B里面规定,浏览器的实现可以不遵守上面规定,有自己的行为方式 总结: 4)块级作用域中有同名的变量和函数声明 /* // 解析 // 写出打印结果 // 写出打印结果 |
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