What "implementation dependent" in javascript?
javascript
Solution
JavaScript (or ECMAScript, to be more precise) is defined by a standard. Implementations, like V8, JavaScriptCore, and JScript… well, implement that standard. If some functionality is implementation-dependent, then it might only work the same way in that implementation and work differently in other implementations.
Problem
I think that "implementation dependent" is implementation(in javascript) depend on something. Could you tell me What something is depended?? Thank you kindly. p.s. if my writing in English too bad,I'm so sorry. Update My question is about Property enumeration order.I forget to tell you.I'm Sorry.