Avoid auto zoom-in on iOS textarea/input

To avoid auto zoom on iOS a textarea/input, set the viewport's maximum-scale = 1:

html
<meta name = "viewport" content = "width=device-width, initial-scale=1, maximum-scale=1, shrink-to-fit=no, viewport-fit=cover">

Note: even if it's set to 1, users can pinch to zoom.

Parameters

width = device-width → Sets the viewport width with the device width
initial-scale = 1 → Zoom level when the page is loaded
maximum-scale = 1 → Maximum zoom that users are allowed to do
shrink-to-fit = no → Specific Safari option that prevents scaling down the page to fit in
viewport-fit = cover → Expands the website to the whole screen, useful for devices with notch devices