Path “/ngsw-config.json” already exists

Question

I have created a new angular project. Then I add

ng add @angular/pwa I got an error like this even I can't find the ngsw-config.json file

Path "/ngsw-config.json" already exist.

In angular CLI version is 6.1.1.

Invalid rule result: Function().

In angular CLI version is 6.0.3

Answer 1

Try to install the CLI version 6.0.8 and then install in a clean project try ng add @angular/pwa@0.6.8

Seems like the error hasn't been solved by the core team so in the meanwhile we have to use a lower version

Answer 2

I had the same issue. I came from Angular 5 and updated to Angular 6.

I use these specific versions to get it work:

npm install --save @angular/cli@6.0.8

npm install --save @angular/pwa@0.6.8

And I had also to remove this entry from angular.json:

"ngswConfigPath": "src/ngsw-config.json"

Answer 3

When you move your @angular/cli version to 6.0.8 then you will face another issue while adding ng add @angular/material ------- to add both the latest Angular Material and PWA into your project Please read below.

This is just the turnaround after reading many slackoverflow and github solution. I was successfully able to add angular material when my @angular/cli was at version 6.1.2 --> then to add Pwa I downgrade the @angular/cli version to 6.0.8 and after I successfully added PWA again I upgraded the @angular/cli to next version v6.2.0-beta.1 then I upgraded my angular/core and angular/material.

My cli code-

**

> npm install --save @angular/cli@6.1.2
> ng new project
> ng add @angular/material
> npm install --save-dev @angular/cli@6.0.8
> ng add @angular/pwa --project <project_name>
> npm install --save @angular/cli@next
> ng update @angular/core
> ng update @angular/material

**

Hope this workaround works for you.

My Version at the moment

@angular/cli - 6.2.0-beta.1
@angular/material & @angular/cdk - 6.4.3
@angular/pwa - 0.6.8

Answer 4

Can you post your angular.json here?

I had the problem that I had defined "configurations: {...}" in my angular.json file. After removing it I was able ng add @angular/pwa

Answer 5

 npm i @angular/cli@6.0.8

 npm add @angular/pwa@6.0.8

it will be ok