String.prototype.bold() - JavaScript | MDN
Syntax
Parameters
None.
Return value
A string beginning with a <b> start tag, then the text str, and then a </b> end tag.
Examples
Using bold()
The code below creates an HTML string and then replaces the document's body with it:
js
const contentString = "Hello, world";
document.body.innerHTML = contentString.bold();
This will create the following HTML:
Instead of using bold() and creating HTML text directly, you should use DOM APIs such as document.createElement(). For example:
js
const contentString = "Hello, world";
const elem = document.createElement("b");
elem.innerText = contentString;
document.body.appendChild(elem);
Specifications
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-string.prototype.bold |