Why does dependency injection appear at the front end, and in what scenarios will it be used?

Sorry, the comprehension is poor. I can understand the back-end dependency injection a little, but I really can"t understand it with the same concept at the front end. I can"t think of a suitable scenario. Please help me explain it. Thank you very much

.
Angularjs vue.js java javascript
Feb.15,2022

there is also a scenario in which one class depends on another, and it is very common. At this time, using dependency injection looks much better than new N classes.

dependency injection is a design idea, and it has nothing to do with front-end and back-end

.

Previous: What if the CSS selector cannot be located in pyspider

Next: The problem of href attribute splicing of a tag in vue

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e67f03-66281.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e67f03-66281.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?