Question

my HTML:

<form>
    <input type="text" name="url" maxlength="10" />
</form>

my JS:

$(document).ready(function(){
    var inputUrl =  $('input[name=url]');
    inputUrl.change(function() {
        alert(inputUrl);
        if ($(inputUrl).contains('watch'))
        {
            alert ('Contains watch: yes');
        }
        else
        {
            alert ('Contains watch: no');
        }
    });
});

Chrome Console shows:

Uncaught TypeError: Object [object Object] has no method 'contains'

What’s the correct syntax for:

if ($(inputUrl).contains('watch'))

Answer 1

if (inputUrl.val().indexOf('watch') > -1) {

Or perhaps you only want to operate on the current one that received the event.

if ($(this).val().indexOf('watch') > -1) {

Or make it case insensitive:

if (/watch/i.test($(this).val())) {