CanvasRenderingContext2D.measureText()

The CanvasRenderingContext2D.measureText() method returns a TextMetrics object that contains information about the measured text (such as its width, for example).

Syntax

ctx.measureText(text);

Parameters

text
The text String to measure.

Return value

A TextMetrics object.

Example

Given this <canvas> element:

<canvas id="canvas"></canvas>

... you can get a TextMetrics object using the following code:

const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');

let text = ctx.measureText('Hello world');
console.log(text.width);  // 56;

Specifications

Specification Status Comment
HTML Living Standard
The definition of 'CanvasRenderingContext2D.measureText' in that specification.
Living Standard

Browser compatibility

DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
measureTextChrome Full support YesEdge Full support 12Firefox Full support 2IE Full support 9Opera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesFirefox Android Full support 4Opera Android Full support YesSafari iOS Full support YesSamsung Internet Android Full support Yes

Legend

Full support
Full support

See also