create-svelte: update tsconfig to allow es2020 module and lib #817
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Why
module es2020
?Currently, using dynamic imports with TypeScript results in:
Dynamic imports have been available unflagged since Node v12.17.
Why
lib es2020
?Node v12.10+ has support for
String.prototype.matchAll
,BigInt
,Promise.allSettled
, andglobalThis
.Since we target Node v12.17+ for ESM support, this allows TS users to use the new builtins and dynamic imports without forcing
target es2020
which lets the nullish coalescing operator??
and optional chaining operator?.
pass through and are undesirable.jsconfig
does not need these changes.