HTML canvas measureText() Method
Example
Check the width of the text, before writing it on the canvas:
JavaScript:
var c=document.getElementById("myCanvas");
var
ctx=c.getContext("2d");
ctx.font="30px Arial";
var txt="Hello World"
ctx.fillText("width:" + ctx.measureText(txt).width,10,50)
ctx.fillText(txt,10,100);
Try it Yourself »
Browser Support
The numbers in the table specify the first browser version that fully supports the method.
| Method | |||||
|---|---|---|---|---|---|
| measureText() | 4.0 | 9.0 | 3.6 | 4.0 | 10.1 |
Definition and Usage
The measureText() method returns an object that contains the width of the specified text, in pixels.
Tip: Use this method if you need to know the width of a text, before writing it on the canvas.
| JavaScript syntax: | context.measureText(text).width; |
|---|
Parameter Values
| Parameter | Description | Play it |
|---|---|---|
| text | The text to be measured | Play it » |
Canvas Object
