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-5927389b049ff338981805/] The above JS returns the userAgent based on the device. Call the above JS in your header. [crayon-5927389b04a0a880568471/] 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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