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timoxley | 8 years ago

> the behavior has always been

The ECMA spec only defines Javascript 1.3 and above. See this description for logical operators for Javascript 1.1: https://web.archive.org/web/20060318153542/wp.netscape.com/e...

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arghwhat|8 years ago

ECMA-262 defines ECMAScript. "JavaScript 1.3" refers to a Netscape-specific language implementation ("Mocha", "LiveScript", "JavaScript"), with version 1.3 being based partially based on ECMA-262 Second Edition. Some of it might still live on in Firefox, but it is certainly not what people refer to as "JavaScript".

Doing some research, it appears that Netscape changed the logical operator behavior in version 1.2 (https://web.archive.org/web/19981202065738if_/http://develop...).

However, they did not highlight this change at all (https://web.archive.org/web/19970630092641fw_/http://develop...), so I suspect it was just a minor cleanup, potentially related to the equality operator change.

As a side-note: Netscape scripting was awful. This was how you casted an object to a Number:

    Number(x) = x;