JS source map broken in Safari with Angular CLI 1.4.2

[waimun]

Bug Report or Feature Request (mark with an x)

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- [ ] feature request

Versions.

@angular/cli: 1.4.2
node: 6.11.3
os: darwin x64
@angular/animations: 4.4.1
@angular/common: 4.4.1
@angular/compiler: 4.4.1
@angular/core: 4.4.1
@angular/forms: 4.4.1
@angular/http: 4.4.1
@angular/platform-browser: 4.4.1
@angular/platform-browser-dynamic: 4.4.1
@angular/router: 4.4.1
@angular/cli: 1.4.2
@angular/compiler-cli: 4.4.1
@angular/language-service: 4.4.1
typescript: 2.3.4

Repro steps.

ng new --skip-install --skip-git --skip-commit my-dream-app
Edit package.json and add these entries under "devDependencies"
"bootstrap": "^4.0.0-beta",
"jquery": "^3.2.1",
"popper.js": "1.11.0"

Edit .angular-cli.json and add entry under "styles"
"../node_modules/bootstrap/dist/css/bootstrap.css",
"styles.css"

Add entry under "scripts" in the following order.
"../node_modules/jquery/dist/jquery.slim.js",
"../node_modules/popper.js/dist/umd/popper.js",
"../node_modules/bootstrap/dist/js/bootstrap.js"

Run npm install then ng serve

Open Safari, open inspector first (need to enable Developer menu in preferences if you don't have it initially) before going to http://localhost:4200/

You will see the 404 error for the missing http://localhost:4200/popper.js.map

Go to Chrome, open inspector first and go to http://localhost:4200/

You won't see the 404 error for the missing http://localhost:4200/popper.js.map

So this issue pertains to Safari browser only.

I found out about this error only after I upgraded from angular CLI 1.2.7 to 1.4.2. Try creating new app under CLI 1.27 version, repeating the same steps above, there is no 404 error about the popper.js.map.

I think something broke with the source maps in Safari. Could be similar issue with the issue #6697 but I am not sure if it is related.

The log given by the failure.

Failed to load resource: the server responded with a status of 404 (Not Found)
http://localhost:4200/popper.js.map

Desired functionality.

This 404 error should not appear as tested in CLI 1.2.7.

Mention any other details that might be useful.

I am using Safari Version 10.1.2 (12603.3.8) if that matters.

[skiabox]

I get the same exact error with safari 11.

[filipesilva]

This is related to the changes in #7279, but I need to investigate further what's going wrong. It should be a harmless 404 though, your application won't be affected by a missing sourcemap.

[waimun]

Agreed, it is a harmless bug and I deployed my application without any concerns at all.

[waimun]

As of today, I just verified that this bug is still valid with Angular CLI 1.6.3, the only thing different is it complains about missing bootstrap.js.map instead of popper.js.map after I upgraded bootstrap to 4.0.0-beta.2.

[dhniels]

I am having this issue as well.Safari (11.0.2) and Angular (5.0.0)

[workfel]

I am having the issue with Safari 10.1 , Angular 5.1.1, Angular cli 1.6.1

[waimun]

Looks like this is de-prioritized. Issue with Safari 11.0.3 , Angular 5.2 and CLI 1.7.3

[waimun]

This is finally fixed. I just verified with Angular 6.0.3 and Bootstrap 4.1.1. No longer giving 404 error about missing popper.js.map or bootstrap.js.map in Safari 11.1.