existence vs hasown

Benchmark created by Rick Waldron on March 30, 2011

Preparation HTML

<script>
  var hasOwn = Object.prototype.hasOwnProperty,
      fakeReg = {
    alpha: "alpha data"
      };
  
  
  function useCheckProp(prop) {
   if (fakeReg[prop]) {
    return fakeReg[prop];
   }
  }
  
  function useHasOwn(prop) {
   if (hasOwn.call(fakeReg, prop)) {
    return fakeReg[prop];
   }
  }
</script>

Test runner

useCheckProp("alpha")

useCheckProp("beta")

useHasOwn("alpha")

useHasOwn("beta")

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.

• Revision 1: published by Rick Waldron on March 30, 2011