JavaScript Switch 语句 - 可能用例值？

Question

我想知道在执行代码块时是否可以在 Javascript switch 语句中使用类似于“this”的东西。

例如:

switch(x) {
    case 'The pyramids of Giza':
        console.log(this);
        break;
    case 'The Leaning Tower of Pisa':
        console.log(this);
        break;
    default:
        console.log('Not found');
}

等同于:

switch(x) {
    case 'The pyramids of Giza':
        console.log('The pyramids of Giza');
        break;
    case 'The Leaning Tower of Pisa':
        console.log('The Leaning Tower of Pisa');
        break;
    default:
        console.log('Not found');
}

这纯粹是为了提高效率，谢谢!

Answer 1

您可以访问您在 switch 语句中测试的变量；毕竟，如果 x 等于“The pyramids of Giza”，那么 x 也必须是您希望在该 case 中使用的值.

switch(x) {
    case 'The pyramids of Giza':
        console.log(x); // output: 'The pyramids of Giza'
        break;
    case 'The Leaning Tower of Pisa':
        console.log(x); // output: 'The Leaning Tower of Pisa'
        break;
    default:
        console.log('Not found');
}