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In Drupal 8.5, when you're adding a menu item, you can add a telephone number by setting the Link to tel:1-555-555-5555.
However, if you try to add an SMS link like sms:1-555-555-5555, it fails validation and says "The path 'sms:1-555-555-5555` is invalid."
What's the easiest way to override this so that I can add an sms link to the menu?
On the sites/default/services.yml
There is an option called filter_protocols
Add sms to it.
If file is not available, copy the file from default.services.yml to services.yml
