The readonly TextMetrics.width property contains the text's advance width (the width of that inline box) in CSS pixels.
Syntax
readonly metrics.width;
Examples
Given this <canvas> element:
<canvas id="canvas"></canvas>
You can get a TextMetrics object using the following code:
var canvas = document.getElementById("canvas");
var ctx = canvas.getContext("2d");
var text = ctx.measureText("foo"); // TextMetrics object
text.width; // 16;
Specifications
| Specification | Status | Comment | 
|---|---|---|
| WHATWG HTML Living Standard The definition of 'TextMetrics.width' in that specification. | Living Standard | 
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari | 
|---|---|---|---|---|---|
| Basic support | 4.0 | 1.5 (1.8) | 9.0 | 9.0 | 3.1 | 
| Feature | Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile | 
|---|---|---|---|---|---|
| Basic support | 2.1 | 1.0 (1.8) | ? | 10.0 | 3.2 |