Jquery check duplicate input value

1. How to check duplicate entry in jQuery?
2. How to check duplicate values in HTML table in jQuery?
3. How to check duplicate values in textbox using javascript?
4. How to check duplicate values in array using jQuery?

How to check duplicate entry in jQuery?

count("$. value == '" + $(this). val() + "'") > 1) // If more than 1 have the same value than highlight this textbox and display an error message $(this). addClass('duplicate'); $('#custom-field-validator').

How to check duplicate values in HTML table in jQuery?

If your question is "How do I check that no two td elements have the same contents?" you can do something like this: var contents = , duplicates = false; $("#yourtableidhere td"). each(function() var tdContent = $(this).

How to check duplicate values in textbox using javascript?

You can refresh the value attribute using $(this). attr('value', $(this). val()); first, then check if there's any other field with class selector has the same value using value selector $('. selector[value="' + current_value + '"]').

How to check duplicate values in array using jQuery?

You can check if an array has duplicates using $. unique function on jQuery.