CanvasRenderingContext2D.textBaseline

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The CanvasRenderingContext2D.textBaseline property of the Canvas 2D API specifies the current text baseline being used when drawing text.

Syntax

ctx.textBaseline = "top" || "hanging" || "middle" || "alphabetic" || "ideographic" || "bottom";

Options

Possible values:

top
The text baseline is the top of the em square.
hanging
The text baseline is the hanging baseline.
middle
The text baseline is the middle of the em square.
alphabetic
The text baseline is the normal alphabetic baseline.
ideographic
The text baseline is the ideographic baseline; this is the bottom of the body of the characters, if the main body of characters protrudes beneath the alphabetic baseline.
bottom
The text baseline is the bottom of the bounding box. This differs from the ideographic baseline in that the ideographic baseline doesn't consider descenders.

The default value is alphabetic.

Examples

Using the textBaseline property

This is just a simple code snippet using the textBaseline property to set a different text baseline setting.

HTML

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

JavaScript

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

ctx.font = "48px serif";
ctx.textBaseline = "hanging";
ctx.strokeText("Hello world", 0, 100);

Edit the code below and see your changes update live in the canvas:

Specifications

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

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) 3.5 (1.9.1) 9 (Yes) (Yes)
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (Yes) (Yes) 1.0 (1.9.1) (Yes) (Yes) (Yes)

See also

Document Tags and Contributors

Contributors to this page: fscholz, Dmandelin
Last updated by: Dmandelin,
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