How to Efficiently Clear an HTML5 Canvas?

Erasing the Canvas for a Refresh

When working with HTML canvases, it's common to need to refresh the drawing surface to remove elements or compositions. This ensures a clean slate for new graphics. Let's explore how to achieve this efficiently.

Instead of drawing a rectangle to cover the canvas, which can be inefficient, you can utilize the clearRect method.

const context = canvas.getContext('2d');
context.clearRect(0, 0, canvas.width, canvas.height);

By providing the coordinates and dimensions of the entire canvas, clearRect effectively erases previous drawings and prepares the canvas for new ones.

This method allows for optimal performance, especially if multiple redraws are necessary during a prolonged drawing session.

The above is the detailed content of How to Efficiently Clear an HTML5 Canvas?. For more information, please follow other related articles on the PHP Chinese website!