I have a website with a minimal, client-side HTML-CSS-JavaScript contact form but I desire to hide the destination email address of that form from the HTML source code so that form users would not be able to find it in HTML source codes from their web browsers.
I considered putting the destination email address in a configuration file and refer this configuration file somehow but the reference itself might appear in source code and expose the file containing the email so people could browse that file and find the email address.
What is the standard or common way to secure a destination email address of a client-side contact form?