CanvasRenderingContext2D:measureText() 方法

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

CanvasRenderingContext2D.measureText() 方法返回一个包含被测量文本相关信息(例如它的宽度)的 TextMetrics 对象。

语法

js
measureText(text)

参数

text

需要测量的文本字符串。

返回值

TextMetrics 对象。

示例

给定 <canvas> 元素:

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

使用下面的代码,你能得到 TextMetrics 对象:

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

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

规范

Specification
HTML
# dom-context-2d-measuretext-dev

浏览器兼容性

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
measureText

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support

参见