IF-block brackets: best practice
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by MasterPeter
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Published on 2010-03-13T13:33:12Z
Indexed on
2010/03/13
13:35 UTC
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I am preparing a short tutorial for level 1 uni students learning JavaScript basics. The task is to validate a phone number. The number must not contain non-digits and must be 14 digits long or less. The following code excerpt is what I came up with and I would like to make it as readable as possible.
if (
//set of rules for invalid phone number
phoneNumber.length == 0 //empty
|| phoneNumber.length > 14 //too long
|| /\D/.test(phoneNumber) //contains non-digits
) {
setMessageText(invalid);
} else {
setMessageText(valid);
}
A simple question I can not quite answer myself and would like to hear your opinions on: How to position the surrounding (outermost) brackets? It's hard to see the difference between a normal and a curly bracket. Do you usually put the last )
on the same line as the last condition? Do you keep the first opening (
on a line by itself? Do you wrap each individual sub-condition in brackets too? Do you align horizontally the first (
with the last )
, or do you place the last )
in the same column as the if
?
Do you keep ) {
on a separate line or you place the last )
on the same line with the last sub-condition and then place the opening {
on a new line? Or do you just put the ) {
on the same line as the last sub-condition?
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