Sometimes, we want to fix Cannot read property ‘getContext’ of null, using canvas with JavaScript.

In this article, we’ll look at how to fix Cannot read property ‘getContext’ of null, using canvas with JavaScript.

How to fix Cannot read property ‘getContext’ of null, using canvas with JavaScript?

To fix Cannot read property ‘getContext’ of null, using canvas with JavaScript, we should make sure the canvas element is loaded before we try to get it.

For instance, we write

<canvas id='canvas'></canvas>

to add a canvas element.

Then we write

const canvas = document.getElementById("canvas");

to select the canvas element with getElementById.

Conclusion

To fix Cannot read property ‘getContext’ of null, using canvas with JavaScript, we should make sure the canvas element is loaded before we try to get it.