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函数内部重新声明参数
函数内部重新声明参数在函数声明时不会报错,在使用时才会报错
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@ -201,14 +201,16 @@ function func() {
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```javascript
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function func(arg) {
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let arg; // 报错
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let arg;
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}
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func() // 报错
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function func(arg) {
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{
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let arg; // 不报错
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let arg;
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}
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}
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func() // 不报错
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```
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## 块级作用域
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