43 ms·

I think "foo.bar is undefined, not a function" might be clearer.

• deleted 12y ago
  [deleted]
• schrijver 12y ago
  Not just clearer, transmits more information!
• kevan 12y ago
  This would help a lot in case where you have multiple calls chained together. foo.bar().fiz().buz() What's undefined, bar, fiz, or buz? Then you have to set a breakpoint to find out. Most people I know try to avoid writing code like this, but Knockout ViewModels are a common place where this bites me.
  • eyko 12y ago
    If bar() or fiz() return undefined (i.e. don't return at all), then you will still get the same error as usual undefined is not an object, I reckon.
    • saraid216 12y ago
      The issue isn't that the functions are returning undefined. It's... foo = {} foo.bar() Or, more commonly, foo = {}; bar = 'bar'; foo[bar]();
• CmonDev 12y ago
  Even better: "Error, you are using JavaScript."