实例如下所示:
//1.解决异步回调问题
//1.1 如何同步异步请求
//如果几个异步操作之间并没有前后顺序之分,但需要等多个异步操作都完成后才能执行后续的任务,无法实现并行节约时间
const fs = require('fs');
let school = {};
fs.readFile('./name.txt','utf8',function (err,data) {
school.name = data;
});
fs.readFile('./age.txt','utf8',function (err,data) {
school.age = data;
});
conso