有没有办法在JavaScript中做类似if（Variable == 1或Variable == 2或Variable == 3）的事情？

Question

我对javascript有点陌生，我无法在google搜索中找到任何内容，我正在为某个程序编写程序，并且能够执行类似我所要求的操作： if (Variable == 1 or Variable == 2 or Variable == 3)对于我要在其中执行的操作将是一个更干净，更简单的解决方案。

Answer 1

Use this:

if(variable==1||variable==2||variable==3){
  //do some stuff
}

Answer 2

basically its depend on requirment. you can write this in some other more clear ways like

if ((Variable == 1 && Variable == 2) || Variable == 3)

if first 2 condition must be true an third one is OR

if (Variable == 1 && (Variable == 2 || Variable == 3))

if first condition must be true and second or third in one is true

Answer 3

The comments to your question make good points, but in case you have to test your variable within a large set of values, something like this will be better.

 // Define an array of accepted values; var acceptedValues = [1,2,3,4,5,6,7,8,9,10]; // Test the variable. var variable = 11; if (acceptedValues.includes(variable)) console.log("variable has a valid value"); else console.log("variable does not have a valid value");