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HTML5 canvas measureText Method

HTML5 track Tag Reference HTML5 canvas reference

Example

Check the width of a text, before writing it on the canvas:

Yor browser does not support the canvas tag.

JavaScript:

var c=document.getElementById("myCanvas");
var ctx=c.getContext("2d");
var txt="Hello World"
ctx.font="30px Arial";
ctx.fillText("width:" + ctx.measureText(txt).width,10,50)
ctx.fillText(txt,10,100);

Try it yourself »

Definition and Usage

The measureText method returns an object, with one attribute: width.

The width attribute returns the width of the text, in pixels.

Can be useful if you must know the width of a text before writing it on the canvas.

JavaScript syntax: context.measureText(text).width;

Browser Support

Internet Explorer Firefox Opera Google Chrome Safari

The measureText method is supported in all major browsers.

Parameter Values

Parameter Values Description Play it
text text The text to be measured Play it »

HTML5 track Tag Reference HTML5 canvas reference

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