JavaScript在代码中显示var [英] Javascript displaying a var in code

问题描述

  function test（）
 { 
 var first = document.getElementById（'first'）。value; // value == hello 
 var second = document.getElementById（second）。value; // value == bye 
 var third = document.getElementById（third）。value; //值==疯狂
 var forth = document.getElementById（forth）.value; // value == night 
 
 
 var myString =\ 
< script> \ 
 var firstValue =\+ first + \ ; \ 
 var secondValue =\+ second + \; \ 
 var thirdValue =\+ third + \; \ 
 var forthValue =\+ forth + \; \ 
 <\ / script>; 
  

我想显示字符串：

 < script> 
 var firstValue =hello; 
 var secondValue =bye; 
 var thirdValue =crazy; 
 var forthValue =night; 
< / script> ; 
  

解决方案

javascript中的变量名称无法启动一个数字。

因此请更改变量名称。

  var name1 = document.getElementById（'1'）。value; 
  

应该会更好。

I want the value of some vars to be shown in the string.

 function test()
 {
 var first = document.getElementById('first').value; //value ==hello
 var second = document.getElementById("second").value; //value == bye
 var third = document.getElementById("third").value;   //value == crazy
 var forth = document.getElementById("forth").value;    // value == night


 var myString = " \
 <script> \
 var firstValue = "\" + first + \""; \
 var secondValue = "\" + second + \""; \
 var thirdValue = "\" +third + \""; \
 var forthValue = "\" +forth + \""; \
 <\/script> ";

I want the string to display:

 <script> 
 var firstValue = " hello "; 
 var secondValue = "  bye "; 
 var thirdValue = " crazy "; 
 var forthValue = " night "; 
 </script> ";

解决方案

variables names in javascript can't start with a number.

So change your variable names.

var name1  = document.getElementById('1').value;

should be better.

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