HTMLCanvasElement.height

The HTMLCanvasElement.height property is a positive integer reflecting the height HTML attribute of the <canvas> element interpreted in CSS pixels. When the attribute is not specified, or if it is set to an invalid value, like a negative, the default value of 150 is used.

This is one of the two properties, the other being HTMLCanvasElement.width, that controls the size of the canvas.

Given this <canvas> element:

<canvas id="canvas" width="300" height="300"></canvas>

You can get the height of the canvas with the following code:

var canvas = document.getElementById('canvas');
console.log(canvas.height); // 300

• The interface defining it, HTMLCanvasElement.
• The other property controlling the size of the canvas, HTMLCanvasElement.width.