How to save the site on the screen?

Question

Mobile development

What to write in the code so that, saved on the smartphone screen, the site opens outside the browser. Like how does the instagram site do it? Go to the site instagram.com on your phone, save it to the main screen and look. It will open outside the browser (the url is not shown) and other sites after saving are opened in the browser.

Answer 1

It's called PWA, google it.
You need to make a manifest, a worker, a site on https, a pack of icons, and so on and so forth.