To add a simple onClick event handler to a canvas element with JavaScript, we set the canvas’ onclick property to the click handler.
For instance, we write
const elem = document.getElementById("myCanvas");
elem.onclick = () => {
console.log("hello world");
};
to select the canvas with getElementById.
And then we set its onclick property to a function that logs 'hello world'.
As a result, when we click on the canvas, we see 'hello world'. logged.