Info

The smallest setTimeout timeout value allowed by the HTML5 specification is 4 ms. Smaller values should clamp to 4 ms.

Therefore, the first two tests below should have about the same result.

P.S. Some browsers freak out when you use a value greater than 599147937791 for the timeout (i.e. they use 0 or 4 ms instead), hence the last test.

Test runner

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Java applet disabled.

// async test
setTimeout(function() {
  deferred.resolve();
}, 0);

// async test
setTimeout(function() {
  deferred.resolve();
}, 4);

// async test
setTimeout(function() {
  deferred.resolve();
}, 10);

// async test
setTimeout(function() {
  deferred.resolve();
}, 40);

// async test
setTimeout(function() {
  deferred.resolve();
}, 599147937792);

Compare results of other browsers

Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

• Revision 1: published by Mathias Bynens on 15th June 2011 and last updated on 1st September 2011
• Revision 2: published by Thomas Aylott on 29th June 2011
• Revision 3: published on 29th June 2011
• Revision 6: published on 29th December 2011
• Revision 7: published on 2nd January 2012
• Revision 8: published on 2nd January 2012

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