Question

How to draw on the canvas with JavaScript?

Answer 1

Example

<script>

var canvas = document.getElementById("myCanvas");

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

ctx.fillStyle = "#FF0000";

ctx.fillRect(0, 0, 150, 75);

</script>

STEPS

Step 1: Find the Canvas Element

First of all, you must find the <canvas> element.This is done by using the HTML DOM method get Element ById()

Step 2: Create a Drawing Object

Secondly, you need a drawing object for the canvas.The getContext() is a built-in HTML object, with properties and methods for drawing

Step 3: Draw on the Canvas

Finally, you can draw on the canvas.

Set the fill style of the drawing object to the color red:

The fillStyle property can be a CSS color, a gradient, or a pattern. The default fillStyle is black.

The fillRect(x,y,width,height) method draws a rectangle, filled with the fill style, on the canvas: