JS_local variable－網頁前端新手上路辛酸史

青春是一個不堪回首卻有靦腆的衝動

Dec 30 Sun 2018 15:15
JS_local variable

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<!DOCTYPE html>
<html>
<head>
   <meta charset="utf-8">
   <title>index15-5</title>
   <script type="text/javascript">
       var Msg = "Hello, This in outside of Func1()."
       alert(Msg); //呼叫函式外的變數Msg
       Func1(); //因呼叫Func1函式，函式內又重心宣告一個Msg變數，所以呼叫函式內的Msg變數
       alert(Msg); //呼叫函式外的變數Msg

       function Func1(){
           var Msg = "Hello,This is inside of Func1()."
           alert(Msg);
       }
   </script>
</html>

即便使用相同的名稱做區域變數，JS一樣能夠正確的區分