I'm not familiar with modern JS and tooling to even try something.
References:
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2MDN BigInt#browser_compatibility what's your target audience/device that you think it might not be available?Thomas– Thomas2023-11-16 07:04:14 +00:00Commented Nov 16, 2023 at 7:04
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@Thomas 1. I use really old browsers sometimes. 2. ActionScript won't get updates any time soon.user894319twitter– user894319twitter2023-11-16 07:35:24 +00:00Commented Nov 16, 2023 at 7:35
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4 Answers
Simply invoke BigInt and catch a possible exception:
let BigIntSupported = true
try {
BigInt(1)
} catch (e) {
BigIntSupported = false
}
Comments
if('BigInt' in window) (or if(window.BigInt)) should suffice.
2 Comments
user894319twitter
I can't find any references yet... developer.mozilla.org/en-US/docs/Web/API/Window or developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/…
globalThis.BigInt === BigInt without any polyfill.
console.log(globalThis.BigInt === BigInt);
I did just 2 tests with Firefox 119.1.1 and it seems to work... Second test had intentional typo and failed as expected.
References:
https://github.com/tc39/proposal-global
I can't edit my older answer for some reason...
Comments
globalThis.BigInt === BigInt
core-js's polyfill requires Chrome 71 or Firefox 65.
References:
2 Comments
AKX
This won't do what you want – you'll get either a NameError if
Foo is not defined, or if Foo is undefined, you'll get true when they're both undefined.user894319twitter
@AKX I did just 2 tests with Firefox 119.1.1 and it seems to work... Second test had intentional typo and failed as expected.