setTimeout函数在浏览器中和Node.js中的区别

setTimeout函数delay时间之后执行一次func.

setTimeout函数原型:

var timeoutID = window.setTimeout(func, [delay, param1, param2, ...]);
var timeoutID = window.setTimeout(code, [delay]);//not recommended for the same reasons as using eval()

//param1, param2, and so forth are additional parameters which are passed through to the function specified by func.

 

区别:

• 浏览器中:func参数为函数对应的字符串
• Node.js中:func参数为函数名

//In Broswer
function f(){
    alert("H");
}
function f2(){
    setTimeout("f()", 2000);
}
window.onload = f2;

//In Node.js
function f(){
    console.log("H");
}
function f2(){
    setTimeout(f, 2000);
}
f2();