5 ms·

Well, you’d typically want to do visual updates when document.hidden wasn’t true, which would work fine.

• ErikBjare 10y ago
  He probably meant `(browser.hidden === false)` which wouldn't work if browser.hidden is undefined. Use == instead of === and it will work fine.
  • minitech 10y ago
    `!document.hidden` would work, and it’s what most people would normally write already. `document.hidden == false` would not work; `false != undefined`.
  • artursapek 10y ago
    No, the opposite of that. If document.hidden === undefined, you don't want to use this optimization at all. What I was saying is, if you initialize doVisualUpdates as "document.hidden === true", in the case where it's undefined, you will never do visual updates.