How to realize form single selection and multiple selection deletion by Angular6

background api is deleted through id, but it is stuck here. I don"t know how to judge whether it is selected or not.
clipboard.png

clipboard.png

Angular6 node.js typescript
Dec.22,2021

check a field of control binding data such as selected , and control binding such as [(ngModel)] = "xxx.selected"

filter the selected id array before deleting 

xxxList.filter((item) => item.selected == true).map((item) => item.id)

Previous: Mini Program's acquisition of formId,submit event is interrupted by binding event

Next: Input type= "file" needs to be checked on the interface before the file is uploaded, and the file box can be opened only when the check is passed, otherwise a prompt is given.

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-64f5-42b6e2c-67db.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-42b6e2c-67db.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?