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javascript异常档案：http://errors.totorojs.org/wiki/
Script error.
| Language | Message | Browser | 备注 |
|---|---|---|---|
| 英文 | Script error. | Firefox, Chrome, Safari, Opera. | |
| Script Error: 0x80072ee4 |
分析
异常信息通常如下：
| 异常字段 | 值 |
|---|---|
| Message | Script error. |
| File | (空) |
| Line | 0 |
- 在某些版本的 Firefox 中，地址栏执行脚本
javascript:notExistFunction()代码，Firebug 可以提示正确的"notExistFunction" is undefined， 但是 onerror 异常事件处理函数中得到的错误消息却是Script error.。 - 用户脚本(userscript) 异常导致。
- 因为同源策略，Firefox, Chrome, Safari 等浏览器， 页面引用的非同域的外部脚本中抛出了异常，本页面无权限获得这个异常详情， 所以就成了
Script error.。
通常大型网站会将静态资源使用独立域名进行管理，这样可以有以下优点：
- 使用 CDN 加速。
- 避免 Cookie 等头信息传输的影响。
- 避免浏览器并发量限制的影响。
但是这样就会带来异常捕获与分析的麻烦。解决办法有：
- 静态文件服务器设置
Access-Control-Allow-Origin头信息。 script标签添加crossorigin属性。
案例
a.com/a.html
|
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<script type="text/javascript"> window.onerror = function(m,f,l){ var s = "message:"+m+", file:"+f+", line:"+l; console.log(s); window.status = s; }; </script> <script type="text/javascript" src="b.com/b.html"></script> |
这里 a.com/a.html 页面引用了 b.com/b.html 脚本『注意：b.html 是一个页面』， 这时会抛出异常：
| Browser | type | Message | File | Line |
|---|---|---|---|---|
| IE | console | 语法错误 | b.com/b.html | 1 |
| onerror | 语法错误 | b.com/b.html | 1 | |
| Firefox | console | syntax error | b.com/b.html | 1 |
| onerror | Script error. | 0 | ||
| Chrome | console | Uncaught SyntaxError: Unexpected token < | b.com/b.html | 1 |
| onerror | Script error. | 0 | ||
| Safari | console | |||
| onerror | Script error. | 0 | ||
| Opera | console | Syntax error at line 1 while loading: expected expression, got ‘<‘ <!DOCTYPE html PUBLI ^ |
a.com/a.html | 4 |
| onerror | Script error. | 0 |
引入外部脚本，该外部脚本会抛出异常：
a.com/a.html
|
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<script type="text/javascript"> window.onerror = function(m,f,l){ var s = "message:"+m+", file:"+f+", line:"+l; console.log(s); window.status = s; }; </script> <script type="text/javascript" src="b.com/b.js"></script> |
b.com/b.js
|
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// some comments // for lines. var a = ; |
| Browser | type | Message | File | Line |
|---|---|---|---|---|
| IE | console | 语法错误 | b.com/b.js | 3 |
| onerror | 语法错误 | b.com/b.js | 3 | |
| Firefox | console | syntax error | b.com/b.js | 3 |
| onerror | Script error. | 0 | ||
| Chrome | console | Uncaught SyntaxError: Unexpected token ; | b.com/b.js | 3 |
| onerror | Script error. | 0 | ||
| Safari | console | Script error. | 0 | |
| onerror | Script error. | 0 | ||
| Opera | console | Syntax error at line 3 while loading: expected expression, got ‘;’ var a = ; ——–^ |
a.com/a.html | 4 |
| onerror | Script error. | 0 |
特殊的，如果是脚本中主动掷出的异常，Safari 会稍有不同。
b.com/b.js
|
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// some comments // for lines. throw new Error("test error on b."); |
| Browser | type | Message | File | Line |
|---|---|---|---|---|
| IE | console | test error on b. | b.com/b.js | 3 |
| onerror | test error on b. | b.com/b.js | 3 | |
| Firefox | console | test error on b. | b.com/b.js | 3 |
| onerror | Script error. | 0 | ||
| Chrome | console | Uncaught Error: test error on b. | b.com/b.js | 3 |
| onerror | Script error. | 0 | ||
| Safari | console | Error: test error on b. | ||
| onerror | undefined | 0 | ||
| Opera | console | Uncaught exception: Error: test error on b. | a.com/a.html | 4 |
| onerror | Script error. | 0 |
参考
- I want to add CORS support to my server
- Cryptic “Script Error.” reported in Javascript in Chrome and Firefox
- WebKit source that checks origin
- Firefox source that checks
- Same origin policy
- “Script Error” on line 0
- Catching Cross-Domain JS Errors
- window.error “Script error”问题跟进
- How to catch JavaScript Errors with window.onerror (even on Chrome and Firefox)
参考自：javascript异常档案
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