javascript - 箭头函数不是函数

Question

我收到以下错误TypeError: f is not a function:我做错了什么？

var expressws = require("express");
var appws = expressws();
var expressWs = require('express-ws')(appws);

function x(ws)
{
    console.log("send");
}

function loop(f,t)
{
    setTimeout(() => loop(), t);
    f();
}

appws.ws('/', function(ws, req) {
    ws.on('message', function(msg){
        var data = JSON.parse(msg);
        if(data.action == "Logged in"){
            loop(() => x(ws),1000);
        }
    });

});

Answer 1

以下间接递归调用不会将任何内容作为参数传递给 loop，因此会出现错误。

setTimeout(() => loop(/* should pass two arguments here */), t);