3 ms·

But for `Objects` (not primitves) it is the identity comparison operator, right?

• kccqzy 8y ago
  I wasn't aware of that. I thought ES2015 added Object.is() for this purpose: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe...
  • AgentME 8y ago
    The main difference between === and Object.is() is that === treats +0 and -0 as equivalent, despite the fact that some math operations treat them differently. I think they added Object.is() because it was awkwardly difficult to make code tell the difference between +0 and -0.
• scottmf 8y ago
  Yes
• ZenPsycho 8y ago
  technically for primatives too, since they are interned, immutable and their value is their identity?