How to fix "Uncaught SyntaxError: Unexpected identifier" on yield

Question

我想在遍历数组时使用生成器函数来调用 API 函数。

我试过使用 setTimeout，但函数没有暂停。它进行了超过 2500 次调用并导致 CORS 提取 API 错误。

function* subjectGenerator(){
    subjects.forEach(subject=>{
        let examyear =  startYear; 
        while (examyear <= endYear) {
            const api = createQuestionsURLApi(subject, examyear);
            // this.subject = subject.toLowerCase();
            getQuestionFromURL(api, subject);
            console.log(subject, api);
            yield examyear++;
        }

    });
}

我希望 yield 被接受，所以我可以使用 subjectGenerator.next() 循环。

Answer 1

感谢@briosheje

function* subjectGenerator(){
    for(let i = 0; i < subjects.length; i++){
        const subject = subjects[i];
        let examyear =  startYear; 
        while (examyear <= endYear) {
            const api = createQuestionsURLApi(subject, examyear);
            getQuestionFromURL(api, subject);
            console.log(subject, api);
            yield examyear++;
        }
    }
}