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概要
<noscript> 标签 当某个script类型在浏览器中不受支持或者被关闭时作为替代的内容
| 内容分类 | Metadata content, flow content, phrasing content. |
|---|---|
| Permitted content | When scripting is disabled and when it is a descendant of the <head> element: in any order, zero or more <link> elements, zero or more <style> elements, and zero or more <meta> elements.When scripting is disabled and when it isn't a descendant of the <head> element: any transparent content, but no <noscript> element must be among its descendants.Otherwise: flow content or phrasing content. |
| Tag omission | 不允许，开始标签和结束标签都不能省略。 |
| Permitted parent elements | Any element that accepts phrasing content, if there are no ancestor <noscript> element, or in a <head> element (but only for an HTML document), here again if there are no ancestor <noscript> element. |
| DOM interface | HTMLElement |
Attributes
This element only includes the global attributes.
Example
<noscript> <!-- anchor linking to external file --> <a href="https://www.mozilla.com/">External Link</a> </noscript> <p>Rocks!</p>
Result with scripting enabled
Rocks!
Result with scripting disabled
Rocks!
Specifications
| Specification | Status | Comment |
|---|---|---|
| WHATWG HTML Living Standard <noscript> |
Living Standard | |
| HTML5 <noscript> |
Recommendation | |
| HTML 4.01 Specification <noscript> |
Recommendation |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | (Yes) | 1.0 (1.7 or earlier) | (Yes) | (Yes) | (Yes) |
| Feature | Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|
| Basic support | (Yes) | 1.0 (1.0) | (Yes) | (Yes) | (Yes) |