Hello! Tell me why when submitting an ad and specifying the price, for example, in the format 0.50 in the normal version of the price with a point can be specified, and in the mobile version of the site is not?

Or tell me where is the part of the code that checks the characters that are entered in the price field. Thanks

@atba
code for checking (looking on id of character pressed) is in item-post.php and global.js