HTML wrapper methodsLimited availability
JavaScript built-in methods such as, String.bold() and String.italics(), wrap strings in (often historic) HTML.
Not yet supported in all major browsers — check the table and provide a fallback.
Discouraged: HTML wrapper methods exist only for backwards compatibility. Use DOM APIs to create elements instead. Use instead: DOM
Browser support
DesktopChrome
1+Supportedsince Dec 11, 2008
Current: 155Edge
12+Supportedsince Jul 29, 2015
Current: 154Firefox
1+Supportedsince Nov 9, 2004
Current: 157Safari
1+Supportedsince Jun 23, 2003
Current: 27MobileChrome Android
18+Supportedsince Jun 27, 2012
Current: 155Firefox Android
4+Supportedsince Mar 29, 2011
Current: 157Safari iOS
1+Supportedsince Jun 29, 2007
Current: 27How to use
Support is still inconsistent across browsers. Use feature detection and test carefully.
Example
Full syntax and examples are on MDN: anchor.
Feature detection
JS · check before using
if ("anchor" in String || ("prototype" in String && "anchor" in String.prototype)) {
// String.anchor is available
}Sub-features
Support for each part of the feature (13). The overall table above shows when the whole feature works.
| Sub-feature | Chrome | Edge | Firefox | Safari | Chrome Android | Firefox Android | Safari iOS |
|---|---|---|---|---|---|---|---|
| String.anchor | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.big | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.blink | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.bold | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.fixed | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.fontcolor | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.fontsize | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.italics | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.link | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.small | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.strike | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.sub | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.sup | 1 | 12 | 1 | 1 | 18 | 4 | 1 |