What is the best way to delete a component with CLI

Question

I tried using "ng destroy component foo" and it tells me "The destroy command is not supported by Angular-CLI"

How do we properly delete components with Angular CLI?

Answer 1

destroy or something similar may come to the CLI, but it is not a primary focus at this time. So you will need to do this manually.

Delete the component directory (assuming you didn't use --flat) and then remove it from the NgModule in which it is declared.

If you are unsure of what to do, I suggest you have a "clean" app meaning no current git changes. Then generate a component and see what is changed in the repo so you can backtrack from there what you will need to do to delete a component.

Update

If you're just experimenting about what you want to generate, you can use the --dry-run flag to not produce any files on disk, just see the updated file list.

Answer 2

1. Delete the folder containing this component under $PROJECT_DIR/src/app,
2. In the $PROJECT_DIR/src/app/app.module.ts file:
   • remove the import statement for this component,
   • remove its name from the declaration section of @NgModule,
3. Remove the line with the export statement for this component from index.ts if such a file exists.

Answer 3

Since it is not yet supported using angular CLI

so here is the possible way, before that please observe what happens when you create a component/service using CLI (ex. ng g c demoComponent).

1. It creates a separate folder named demoComponent (ng g c demoComponent).
2. It generate HTML,CSS,ts and a spec file dedicated to demoComponent.
3. Also, It adds dependency inside app.module.ts file to add that component to your project.

so do it in reverse order

1. Remove Dependency from app.module.ts
2. Delete that component folder.

when removing the dependency you have to do two things.

1. Remove the import line reference from app.module.ts file.
2. Remove the component declaration from @NgModule declaration array in app.module.ts.

Answer 4

Currently Angular CLI doesn't support an option to remove the component, you need to do it manually.

1. Remove import references for every component from app.module
2. Delete component folders.
3. You also need to remove the component declaration from @NgModule declaration array in app.module.ts file

Answer 5

Using Visual Studio Code, delete the component folder and see in the Project Explorer(left hand side) the files that colors Red that means the files are affected and produced errors. Open each files and remove the code that uses the component.

Answer 6

I wrote a bash script that should automate the process written by Yakov Fain below. It can be called like ./removeComponent myComponentName This has only been tested with Angular 6

#!/bin/bash
if [ "$#" -ne 1 ]; then
    echo "Input a component to delete"
    exit 1
fi

# finds folder with component name and deletes
find . -type d -name $1 | xargs rm -rf

# removes lines referencing the component from app.module.ts
grep -v $1 app.module.ts > temp
mv temp app.module.ts

componentName=$1
componentName+="Component"

grep -v -i $componentName app.module.ts > temp
mv temp app.module.ts

Answer 7

This is not supported by Angular CLI and they are in no mood to include it any time soon.

Here is the link to the actual created issue - https://github.com/angular/angular-cli/issues/1776

And a screenshot of the solution from the officials -

Answer 8

I am not sure if it is the best way, but it worked for me.

• First, I deleted the component folder.
• Then, I cleared app.module.ts, app.component.ts & app.component.html of the imports and declarations related to the component I wanted to delete.
• Similarly, I cleared main.ts.

I just saved and refreshed the app and it worked.

Answer 9

From app.module.ts:

• erase import line for the specific component;
• erase its declaration from @NgModule;

Then delete the folder of the component you want to delete and its included files (.component.ts, .component.html, .component.css and .component.spec.ts).

Done.

-

I read people saying about erasing it from main.ts. You were not supposed to import it from there in the first place as it already imports AppModule, and AppModule is the one importing all the components you created.

Answer 10

Answer for Angular 2+

Remove component from imports and declaration array of app.modules.ts.

Second check its reference is added in other module, if yes then remove it and

finally delete that component Manually from app and you are done.

Or you can do it in reverse order also.

Answer 11

I needed to delete an Angular 6 directive whose spec file was erroneous. Even after deleting the offending files, removing all references to it and rebuilding the app, TS was still reporting the same error. What worked for me was restarting Visual Studio - this cleared the error and all traces of the old unwanted directive.

Answer 12

Angular 10 now I am using. After manually deleting all files and references then I re-run "ng serve", it worked.

Answer 13

First of all, remove component folder, which you have to delete and then remove its entries which you have made in "ts" files.

Answer 14

If you looking for some command in CLI, Then ans is NO for now. But you can do manually by deleting the component folder and all the references.