在Javascript中使用带有多个情况的switch语句时，如何引用情况？

Question

So I have some code:

var Animal = 'Giraffe';
switch (Animal) {
  case 'Cow':
  case 'Giraffe':
  case 'Dog':
  case 'Pig':
    console.log('This animal will go on Noah\'s Ark.');
    break;
  case 'Dinosaur':
  default:
    console.log('This animal will not.');
}

Ideally, I'd like the first console.log to print "This Giraffe will go on Noah's Ark", or whatever the variable Animal happened to be. I want to refer to the case. However, I'm not sure how to write that code. Can someone help?

Answer 1

只需使用其他参数log和Animal 。

console.log('This', Animal, 'will go on Noah\'s Ark.');

Answer 2

You could use a token %s ( string in this case) and than after a comma use your variable:

 var Animal = 'Giraffe'; switch (Animal) { case 'Cow': case 'Giraffe': case 'Dog': case 'Pig': console.log('This %s will go on Noah\\'s Ark.', Animal); break; case 'Dinosaur': default: console.log('%s will not.', Animal); } 

Answer 3

Just use your variable:

var Animal = 'Giraffe';
switch (Animal) {
  case 'Cow':
  case 'Giraffe':
  case 'Dog':
  case 'Pig':
    console.log('This ' + Animal + ' will go on Noah\'s Ark.');
    break;
  case 'Dinosaur':
  default:
    console.log('This animal will not.');
}

(note: I'm using string concatenation here under the assumption that you may actually want to do something other than use the console.log function to do something like this - if you really just want to use console.log , it may be more reasonable to use one of the other answers provided)