Question

How can I do the opposite of the following code.
I need to check if it’s false at the first place not if it’s right.

var a = $("#phone").val();
var filter = /^[0-9]{8}$/;

if(filter.test(a)) {

} else {

}

Answer 1

Just put ! before filter.test(a) or use filter.test(a) == false

var a = $("#phone").val();
var filter = /^[0-9]{8}$/;

if(!filter.test(a)) { // or if(filter.test(a) == false)

} else {

}