Meta for mobile page development and meta for Mobile Page Development

Meta for mobile page development and meta for Mobile Page Development

<Meta name = "viewport" content = "width = device-width, initial-scale = 1">

In the mobile phone environment, the font size is applicable to the mobile phone, and the text in a large segment is subject to automatic line breaks.
<Meta name = "viewport" content = "width = device-width, minimum-scale = 1.0, maximum-scale = 1.0, user-scalable = no"/>

This prevents the page from being enlarged or reduced by double-clicking on the mobile phone screen.

The preceding two statements are only used in this way, and I am not sure about the specific parameter interpretation.