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by genrez
1887 days ago
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I'm learning all sorts of things today! handleEvent certainly seems like the language certified way to do this. It does seem like that means you need a case statement in handleEvent if you want to listen for multiple events, which I guess is not the end of the world. It does solve the "redefine the function for every object" problem though, provided any third party apis understand the EventListener interface. |
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It's a platform API (the browser DOM). It's a completely separate matter from JS the language. It has, though, been the "correct" way to work with events since at least as far back as 1998 or so. It's the official platform APIs that had to change to accommodate the function-as-a-listener pattern (requiring an entire revision to the interface definition language itself so that it would have the power to express it), since so many browsers implemented that non-standard extension, and so many programmers insisted on using it. And that pattern is also directly responsible for why arrow functions and Function.prototype.bind were added to the language itself. If only it had been addressed differently, writing programs for the web browser might look a lot different than the way it does today.