Question

我的问题分为三个问题：

1.它甚至可能吗？

2.如果我们可以使用默认值吗？

3.或者可以在switch语句之外执行此操作吗？

问题2的例子：

switch(stuff) {
    case 'something':
        some event;
        break;
    case 'the case that could be add by the default element':
        some event that could happen only after the code was executed
    default:
        magic code that would add another case element
}

问题3的示例：

switch(stuff) {
    case 'something':
        some event;
        break;
    case 'the case that could be add by the magic code':
        some event that could happen only after the code was executed
    default:
        some default event
}

magic code that would be executed after the switch and that would add a case

Answer 1

您无法对JavaScript进行真正的编码以使其自行修改，但您可以对switch语句进行编码，以便最初会忽略某些情况，然后启用＆＃34;＆＃34;后：

var enableCase = false;

switch(true) {
    case stuff === 'something':
        // some code;
        break;
    case enableCase && stuff === 'the case not initially enabled':
        // some code
        break;
    default:
        // turn on previous case:
        enableCase = true;
        break;
}

话虽如此，我并不是真的建议这样做。根据你想要解决的根本问题，几乎可以肯定有一种更明智的方法来实现它。也许使用if / if else / else块来测试其他地方设置的标志。

是否可以在javascript中添加用于切换语句的案例？

1 个答案: