js 冒号 等号

let person = {
    name: "John",
    age: 30
};

switch (day) {
    case 1:
        console.log("Monday");
        break;
    case 2:
        console.log("Tuesday");
        break;
    // ...
}

let x = 10;

function greet(name) {
    console.log("Hello, " + name);
}

greet("John"); // 这里"John"被赋值给形参name

let a = 5;
if (a = 10) { // 这里是赋值操作，不是比较操作
    console.log("This will always execute");
}

// 正确的比较方式
if (a === 10) {
    console.log("a is equal to 10");
}

let person = {
    name = "John", // 错误，应使用冒号
    age: 30
};

// 正确的方式
let person = {
    name: "John",
    age: 30
};