使用字符串“includes()"；在切换 Javascript 的情况下

2022-01-19 00:00:00 switch-statement javascript

在Javascript中，有没有办法实现类似的东西?

In Javascript, is there a way to achieve something similar to this ?

const databaseObjectID = "someId"; // like "product/217637"

switch(databaseObjectID) {
    case includes('product'): actionOnProduct(databaseObjectID); break;
    case includes('user'): actionOnUser(databaseObjectID); break;
    // .. a long list of different object types
}

这更像是一个好奇的问题，以了解 switch/case 的可能性，因为在这种特殊情况下，我使用 const type = databaseObjectID.split('/')[0]; 解决了我的问题； 并在 type

This is more a curiosity question to understand the possibilities of switch / case, as in this particular case I have solved my problem using const type = databaseObjectID.split('/')[0]; and apply the switch case on type

推荐答案

您的使用将被视为滥用案例.

You usage would be considered an abuse of case.

而只是使用 ifs 

     if (databaseObjectId.includes('product')) actionOnProduct(databaseObjectID); 
else if (databaseObjectId.includes('user'))    actionOnUser(databaseObjectID); 
// .. a long list of different object types

如果 ObjectId 包含产品或用户周围的静态内容，您可以将其移除并使用用户或产品作为键:

If the ObjectId contains static content around the product or user, you can remove it and use the user or product as a key:

var actions = {
  "product":actionOnProduct,
  "user"   :actionOnUser
}

actions[databaseObjectId.replace(/..../,"")](databaseObjectId);

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