Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

The bold() method creates a <b> HTML element that causes a string to be displayed as bold.



Return value

A string containing a <b> HTML element.


The bold() method embeds a string in a <b> element: "<b>str</b>".


Using bold()

The following example uses string methods to change the formatting of a string:

const worldString = 'Hello, world';

console.log(worldString.blink());   // <blink>Hello, world</blink>
console.log(worldString.bold());    // <b>Hello, world</b>
console.log(worldString.italics()); // <i>Hello, world</i>
console.log(worldString.strike());  // <strike>Hello, world</strike>


ECMAScript Language Specification
# sec-string.prototype.bold

Browser compatibility

BCD tables only load in the browser

See also