negate one textbox from $('input[type=“text”]')

Question

I have 4 textboxes, I wrote some code:

$('input[type="text"]').keyup(function () {
    if ($(this).val() == '') {
...

I do not want to apply this code to 1 texbox, what should I do ?

Answer 1

Give that textbox an id and update your code like this:

$('input[type="text"]:not("#id_of_txt")').keyup(function () {
    if ($(this).val() == '') {
    }
});

This solution is just to answer your question, and not to suggest as a good practice. You might at some point add further input boxes in the DOM, and you will have to keep adding to the :not list as everything else will be bound to the keyup event.

The better solution is to give the three input boxes a common class, and update your code like this:

$('input.class_of_txt').keyup(function () {

Answer 2

Add a common class to the 3 textboxes.

<input type="text" class="myclass" />

And then only reference that class:

$('.myclass').keyup(function () {

Any other solution will reduce the maintainability of your code. What if there will be another special textbox? You will make an exception for that also?