Menu
×
   ❮     
HTML CSS JAVASCRIPT SQL PYTHON JAVA PHP HOW TO W3.CSS C C++ C# BOOTSTRAP REACT MYSQL JQUERY EXCEL XML DJANGO NUMPY PANDAS NODEJS R TYPESCRIPT ANGULAR GIT POSTGRESQL MONGODB ASP AWS AI GO KOTLIN SASS VUE GEN AI SCIPY CYBERSECURITY DATA SCIENCE
     ❯   

Canvas Clock Start


In these chapters we build an analog clock using HTML Canvas.


Part V - Start the Clock

To start the clock, call the drawClock function at intervals:

JavaScript:

const canvas = document.getElementById("canvas");
const ctx = canvas.getContext("2d");
let radius = canvas.height / 2;
ctx.translate(radius, radius);
radius = radius * 0.90
//drawClock();
setInterval(drawClock, 1000);
Try it Yourself »

Example Explained

The only thing you have to do (to start the clock) is to call the drawClock function at intervals.

Substitute:

drawClock();

With:

setInterval(drawClock, 1000);

Note

Intervals are in milliseconds. drawClock() will be called for each 1000 milliseconds.


W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. While using W3Schools, you agree to have read and accepted our terms of use, cookie and privacy policy.

Copyright 1999-2023 by Refsnes Data. All Rights Reserved. W3Schools is Powered by W3.CSS.