所有功能都必须有名字吗？

问题描述

在这段代码中，我只是想知道为什么函数没有名字，为什么它以分号结尾};而不只是一个大括号}

In this code, I was just wondering why the function doesn't have a name, and why does it end with a semicolon }; instead of just a curly bracket }

window.onload = function() {
    var x = document.getElementById("demo");
    x.style.color = '#6600FF';
    x.style.width = '100px';
};

我尝试过：



我也尝试在函数中添加一个名称，它给出了相同的答案，所以我猜它是可选的？

What I have tried:

I also tried adding a name to the function, and it gave the same answer so I'm guessing it's optional?

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