三等号是在哪一年引入 javascript 的？

Question

In which year was the triple equals sign introduced to JavaScript?

Bonus points for

==

===

Object.is

and any equality checks that I am missing.

Answer 1

According to the ECMA Standards, as found on: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Comparison_Operators#Specifications

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Object.is - June 2015

Object.is was introduced in Standard ECMA-262 6th Edition / June 2015

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=== - December 1999

=== was introduced in the 3rd edition of ECMAScript, aka JavaScript 1.3 .

ECMAScript 3rd Edition (ECMA-262) Standard

Adds === and !== operators.

Implemented in JavaScript 1.3 which is dated December 1999 on Standard ECMA-262 3rd Edition

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== - June 1997

I suspect == predates ECMAScript standards, but the closest standard i can find is

Standard ECMA-262 June 1997 aka JavaScript 1.0

However, this is merely the date they were standardized, if they existed pre-standardization, the dates may be incorrect.