How HTML draws paths and shapes on canvas

This article mainly introduces HTML how to draw the path and shape on the canvas related knowledge, the content is detailed and easy to understand, the operation is simple and fast, has a certain reference value, I believe that after reading this HTML how to draw the path and shape on the canvas article will have a harvest, let's take a look.

Code

Drawing on Canvas

_ window.onload = function () {

Var canvas = document.getElementById ("myCanvas")

Var context = canvas.getContext ("2d")

/ / draw stuff here

}

Except for all lines from 7 to 11, all the other lines are very simple. When the _ window.onload page loads, the anonymous function attached to the event is executed. After the page is loaded, we can use the document.getElementById () method to access the canvas element. Later, we define the 2D canvas context by passing 2d to the method of the getContext () canvas object.

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