When I use the yield* expression on TypeScript, it always gets an error.
Type 'IterableIterator' is not an array type.
How can I set the types correctly without using any to avoid the errors?
function* g1(): IterableIterator<number> {
yield 2;
yield 3;
yield 4;
}
function* g2(): IterableIterator<number> {
yield 1;
// ERROR: Type 'IterableIterator<number>' is not an array type.
yield* g1();
yield 5;
}
const iterator = g2();
If possible update target to es2015 (or above) in the tsconfig to resolve the error without enabling down level iteration`:
{
"compilerOptions": {
"target": "es2015"
}
}
If you target es5, enable downLevelIteration explicitly in the tsconfig:
{
"compilerOptions": {
"target": "es5",
"downlevelIteration": true
}
}
for (let i = 0; i < arr.length; i++) is every bit readable than any (of these showoff) for-of arrays :)
tsc demo.ts --lib "es6","dom" --downLevelIteration
Use this command for compilation. It will solve the issue. Adding these values in tsconfig.json will not solve the problem, if tsconfig.json is created with target:es5. updating tsconfig.json manually will not work. Use this command, just change the name of your .ts file.
