What does {[native code]} mean in WebKit Inspector?

Question

For example, open the JS console and enter toString<Enter> .

You will receive the following:

 function toString() { [native code] } 

Compare this to:

 function foo() { return 'bar'; } foo 

which produces:

 function foo() { return 'bar'; } 

Does this mean that its API for an interpreter that directly executes some internal procedures in C or something else is used to program it when calling this method?

Answer 1

[native code] is just a label that indicates that information about the implementation of the function body is processed by the browser “initially”.