By it's nature switch only compares the value of a single variable.
Generally a switch works best when comparing the value/state of a single variable against a known set of possibilities. Think of incoming keystroke and you want to act differently depending on what key is pressed. A switch here makes much more sense than multiple if/else.
switch(key.value) {
case 'a':
// do something...
break
case 'b':
// do something else...
break
// etc
}
If you are comparing different variables - rather than one single, maybe also using functions as conditions, a switch statement would not be appropriate at all - if even possible.
Sample pseudo code for a login to validate username and password.
signup(username, password) {
let errorMessage = ''
if (username.length < 3 && username.length > 12)
errorMessage = `Username must be at least 4 chars long but no longer than 12.`
else if (isUsernameTaken(username))
errorMessage = `Username is already taken.`
else if (isPasswordTooWeak(password))
errorMessage = `Password must bla bla`
if (errorMessage)
alert(errorMessage)
else
createUser(user, password)
I generally consider a lot of trailing if else as bad practice and try to solve things with a different approach, depending on situation. I think it is pain to maintain, can be hard to follow and bug prone. A switch statement however are usually pretty straight forward, just avoid magic numbers/strings and use constants, enums or similar instead.
Happy coding!
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By it's nature switch only compares the value of a single variable.
Generally a switch works best when comparing the value/state of a single variable against a known set of possibilities. Think of incoming keystroke and you want to act differently depending on what key is pressed. A switch here makes much more sense than multiple if/else.
If you are comparing different variables - rather than one single, maybe also using functions as conditions, a switch statement would not be appropriate at all - if even possible.
Sample pseudo code for a login to validate username and password.
I generally consider a lot of trailing
if elseas bad practice and try to solve things with a different approach, depending on situation. I think it is pain to maintain, can be hard to follow and bug prone. A switch statement however are usually pretty straight forward, just avoid magic numbers/strings and use constants, enums or similar instead.Happy coding!