In javascript-web, how does one count whether a user calls the phone?

On the web, how does one count whether a user calls the phone ?, How does one calculate whether a user calls a phone call on the web ?, Realistic ideas

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On the web, how does one count whether a user calls the phone ?, Realistic ideas

UseTel :******Register a touch event for the element, and then count the event

After the user calls the phone, he wants to trigger an event and store the database.

Is there no good way except the above methods?

I feel that I can only judge whether the user has clicked the number and whether the user has actually called the number, because the system interface is displayed after the number is clicked...