How to show WhatsApp button only for mobile users on your website

Create a javascript file identifydeviceos.js with below code to identify the device OS [crayon-59ebd6c8bf64c234098598/] The above JS returns the userAgent based on the device. Call the above JS in your header. [crayon-59ebd6c8bf658388902250/] Above JQuery just shows or hides the WhatsApp button based on the OS. The button needs to applied .whatsapp_btn class....
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