I want to execute something after rendering the DOM tree.

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I'm trying to build an app by using canvas. In this process,

I try to do below.

getElementsByTagName('canvas');

But there is nothing.

If I surround my code with this.

setTimeout(...,0)

It will work.

I think it is caused by rendering. How to execute after render?

about 4 years ago · Juan Pablo Isaza

Answer question

Accepted Answer · 2022-07-10T21:08:47.512Z

document.body.onload = function() {
  var canvas = getElementsByTagName('canvas')[0]
  // do something with canvas
}