无法运行JavaScript
[英]Can't run JavaScript
问题描述
I'm following tutorial cideon on JavaScript and wrote some examples in Notepad++ and saved them as something.html. 
我正在关注JavaScript教程cideon并在Notepad ++中编写了一些示例并将它们保存为something.html。 The problem is when I open it with IE or Chrome, the code between <script> and </script> tags doesn't run at all. 问题是当我用IE或Chrome打开它时， <script>和</script>标签之间的代码根本不运行。 What is wrong with that? 这有什么问题？
<!doctype html>
<html>
<head>
<title>Example of prompt()</title>
<script>
var user_name;
user_name = prompt("What is your name?");
document.write("welcome to my page ")
+ user_name + "!");
</script>
</head>
</html>
4 个解决方案
解决方案1
7 已采纳 2016-04-20 08:44:36
There is a syntax error in document.write statement. document.write语句中存在语法错误。
Write it as follow 写如下
document.write("welcome to my page "+ user_name + "!");
解决方案2
0 2016-04-20 08:46:38
有一个太多“）”
document.write("welcome to my page " + user_name + "!");
解决方案3
0 2016-04-20 08:47:27
First, move the script part out of the head to the body tag. 首先，将脚本部分从头部移动到body标签。
Second, write 第二，写
document.write("welcome to my page " + user_name + "!");
in one line and remove the first closing parenthesis. 在一行中删除第一个右括号。
<!doctype html> <html> <head> <title>Example of prompt()</title> </head> <body> <script> var user_name; user_name = prompt("What is your name?"); document.write("welcome to my page " + user_name + "!"); </script> </body> </html>
解决方案4
0 2016-04-20 08:54:03
When you open in chrome. 当你用chrome打开时。 Press F12 or Right Click > Inspect Element. 按F12或右键单击>检查元素。 Make sure you select "Console" at the top. 确保在顶部选择“控制台”。 Pay attention and try to understand what the console tells you. 注意并尝试了解控制台告诉您的内容。
In your case, this is what it says when I paste that code into my console: 在您的情况下，当我将该代码粘贴到我的控制台时，这就是它所说的：
"Unexpected token" This means that it can't understand the script, it was expecting a ; “意外的令牌”这意味着它无法理解脚本，它正在期待一个; or a new line because you have a bracket at the end. 或者是新行，因为最后有一个括号。 Remove that and it should work. 删除它，它应该工作。
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