ReferenceError：赋值中的左侧无效 [英] ReferenceError: Invalid left-hand side in assignment

问题描述

我的摇滚剪刀游戏代码（称为折腾）如下：

my code for a rock paper scissors game (called toss) is as follows:

var toss = function (one,two) {
    if(one = "rock" && two = "rock") {
        console.log("Tie! Try again!");
    }
    // more similar conditions with `else if`
};

当我输入参数时

toss("rock","rock")

我得到此错误代码：

ReferenceError：赋值中的左侧无效

"ReferenceError: Invalid left-hand side in assignment"

如何解决？此错误意味着什么以及发生此错误时的其他情况？

How to fix it? What this error means and what other cases when this error can happen?

推荐答案

您必须使用 == 进行比较（或甚至 === ，如果你想比较类型）。单个 = 用于分配。

You have to use == to compare (or even ===, if you want to compare types). A single = is for assignment.

if (one == 'rock' && two == 'rock') {
    console.log('Tie! Try again!');
}

这篇关于ReferenceError：赋值中的左侧无效的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！