String constructor

String constructor length 指定的函式，建立字串。

語法 string.constructor，constructor 屬性包含用來建構該特定物件執行個體的函式參考。
語法 string.length，length 字串是不可變的因此無法修改字串的長度。

<p id="demo"></p> <script> var x = "1234567890" , i = 1234; var out = "<font size='5'>"; out += 'x = "1234567890" is ' ; if (x.constructor == String){ out += "Object is a String.";} out += '<br>i = 1234 is ' ; if (i.constructor != String){ out += "Object is not a String.";} out += "<br>x.length = " + x.length; document.getElementById("demo").innerHTML = out ; </script>

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