0x800a138f - JavaScript runtime error: Unable to set property 'width' of undefined or null reference File

Question

I'm navigating back and forth in my application and I get this error a number of times.

It comes from default.js file.

function button1Click(x,y,rowz,cols) {
        document.getElementById("circlecanvas").width = x;

What should I do to prevent this error.

I'm using RC.

Answer 1

width property is under style property

you can write it like this:

document.getElementById("circlecanvas").style.width = x;

Answer 2

You got "Unable to set property 'width' of undefined or null.

This means that the thing before .width was null/undefined

Debug with:

function buttion1Click(x,y,rowz,cols) {
  var circleCanvasEl = document.getElementById('circlecanvas');
  if (circleCanvasEl) {
    circleCanvasEl.width = x;
  } else {
    debugger;
  }

One thing you may be doing is writing it in default.js before the app.onactivate event? Before the DOM was parsed by the browser - some libraries call this document.ready event. However the name of your event makes it seem like it was caused by someone clicking a button so maybe that's wrong...