koa yield next; ReferenceError: next is not defined
var koa = require(‘koa’); var app = koa();
app.use(function *(){ var start = new Date(); yield next; var ms = new Date - start; this.set(‘X-Response-Time’,ms+‘ms’); });
app.use(function *(){ this.body = ‘hello world’; }); app.listen(3000); yield next;不是跟express中的next();类似吗，为什么会报错？
5 回复
官方是这样说的吧
app.use(co.wrap(function *(ctx, next) {
const start = new Date();
yield next();
const ms = new Date() - start;
console.log(`${ctx.method} ${ctx.url} - ${ms}ms`);
}));
