如何在带有 yield 的生成器中使用 Array.prototype.reduce？

Question

I would like to run a reduce function in which I want pause it via yield. Here is what I tried and failed because error: Uncaught SyntaxError: Unexpected identifier

function* abc() {
    return [1,2,3].reduce((accumulator, currentValue) => {
        accumulator.push(currentValue); 
        yield currentValue;
        return accumulator;
    }, []);
}

Answer 1

You can't yield inside a callback - any yield s must be directly inside a generator function. You'll have to transform the reduce into something else.

 function* abc() { const accumulator = []; for (const currentValue of [1, 2, 3]) { yield currentValue; accumulator.push(currentValue); } // do something with accumulator? } console.log(...abc());