javascript - What does the following paragraph about meta mean?

Question

{Code...} Can any master explain it in detail, and share the complete collection of usage of meta written by that master?

迷茫 · Answer

These two are Apple-specific labels. Set this page to be launched from the home screen and use full screen. The style of the status bar in full screen mode is black.

These two are old tags from the feature phone era, used to mark mobile version pages, and are now basically abandoned.

This is a responsive tag.
width=device-width specifies that the viewport width is equal to the screen width;
target-densitydpi=160dpi is the scaling tag of the old Android era, which has now been abandoned by WebKit;
initial-scale=1.0 is the default scaling ratio;
maximum- scale=1 is the maximum zoom ratio;
user-scalable=no is whether users are allowed to zoom;
minimal-ui is an old label dedicated to Apple, used to hide the navigation bar and taskbar, and has been abandoned in ios8.

迷茫 · Answer

Various meta explanations

曾经蜡笔没有小新 · Answer

//删除苹果默认的工具栏和菜单栏


//设置苹果工具栏颜色


// 针对手持设备优化，主要是针对一些老的不识别viewport的浏览器，比如黑莓 


// 微软的老式浏览器


// 优化移动浏览器的显示 css像素宽度等于设备像素宽度，不允许缩放

meta manual