Initially, on the project page, forms were used to send data to the server:

<input type="text" id="text" size="35" pattern="^[0-9a-zA-Z, ]+$" required>

The minimum validation was in the form pattern = "^ [0-9a-zA-Z,] + $" required

It worked only in PC browsers.

Now I redo everything on Jquery.

  • At number 3, it seems to be something similar. sitepoint.com/10-jquery-form-validation-plugins - Sleepy Panda
  • I'll keep it on mind. In other questions, I also saw a mention about the jquery.validate plugin, but are there really no simple options not to load a bunch of extra code? - Xstroy

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