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I have function that is going to display message containing product name. But problem appeared when Item contained ' inside. Can this be prevented to take whole string as it is and ignore ' character

Calling function

cart.add('<?php echo($imeProizvoda); ?>')

NOT WORKING FOR -> Razer Blade 15'

javascript

var cart = 
 'add': function(product_id) 
 addProductNotice('Proizvod dodat u korpu', '<h3>'+product_id+' dodat u <a href="cart.php">korpu</a>!</h3>', 'success');
 
 

You could use a template literal instead of ' delimiters, allowing you to use both ' and " (relatively common characters), but you would have to escape backticks (which are relatively uncommon):

cart.add(`<?php echo($imeProizvoda); ?>`)

If you want to be able to use backticks as well, you can replace all backticks in your PHP variable with a backslash plus that backtick:

<?php echo(str_replace('`', '\`', $imeProizvoda)); ?>

I have faced this problem before, and solved it using json_encode() on the PHP response, like this:

cart.add(<?php echo json_encode($imeProizvoda);?>)