Failed to load module script: Expected a JavaScript module script but the server responded with a MIME type of "text/html" - Nginx

suku
April 30, 2022
333 views
5 votes
7 Answers

I deployed my angular application(Static webpage) on kubernetes and tried launching it from Google Chrome. I see app is loading, however there is nothing displayed on the browser. Upon checking on browser console , I could see this error

"Failed to load module script: Expected a JavaScript module script but the server responded with a MIME type of "text/html". Strict MIME type checking is enforced for module scripts per HTML spec."
for (main.js,poylfill.js,runtime.js) files . I research few forums and one possible rootcause could because of type attribute in <script> tag should be type=text/javascript instead of type=module in my index.html file that is produced under dist folder after executing ng build. I don’t how to make that change as to these tags as generated during the build process, and my ng-build command is taken care by a docker command.

URL i’m trying to access will be something like : "http://xxxx:portnum/issuertcoetools

note: The host xxxx:portnum will be used by many other apps as well.

Are there any work-arounds or solutions to this issue?

index.html – produced after running ng-build in local, (which is the same i see in kubernetes POD too)

<!DOCTYPE html><html lang="en"><head>
    <meta charset="utf-8">
    <title>Data Generator</title>
    <base href="/">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="icon" type="image/x-icon" href="favicon.ico">
    <link rel="preconnect" href="https://fonts.gstatic.com">
    <style type="text/css">@font-face{font-family:'Roboto';font-style:normal;font-weight:300;font-display:swap;src:url(https://fonts.gstatic.com/s/roboto/v29/KFOlCnqEu92Fr1MmSU5fCRc4AMP6lbBP.woff2) format('woff2');unicode-range:U+0460-052F, U+1C80-1C88, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F;}@font-face{font-family:'Roboto';font-style:normal;font-weight:300;font-display:swap;src:url(https://fonts.gstatic.com/s/roboto/v29/KFOlCnqEu92Fr1MmSU5fABc4AMP6lbBP.woff2) format('woff2');unicode-range:U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;}@font-face{font-family:'Roboto';font-style:normal;font-weight:300;font-display:swap;src:url(https://fonts.gstatic.com/s/roboto/v29/KFOlCnqEu92Fr1MmSU5fCBc4AMP6lbBP.woff2) format('woff2');unicode-range:U+1F00-1FFF;}@font-face{font-family:'Roboto';font-style:normal;font-weight:300;font-display:swap;src:url(https://fonts.gstatic.com/s/roboto/v29/KFOlCnqEu92Fr1MmSU5fBxc4AMP6lbBP.woff2) format('woff2');unicode-range:U+0370-03FF;}@font-face{font-family:'Roboto';font-style:normal;font-weight:300;font-display:swap;src:url(https://fonts.gstatic.com/s/roboto/v29/KFOlCnqEu92Fr1MmSU5fCxc4AMP6lbBP.woff2) format('woff2');unicode-range:U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+1EA0-1EF9, U+20AB;}@font-face{font-family:'Roboto';font-style:normal;font-weight:300;font-display:swap;src:url(https://fonts.gstatic.com/s/roboto/v29/KFOlCnqEu92Fr1MmSU5fChc4AMP6lbBP.woff2) format('woff2');unicode-range:U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;}@font-face{font-family:'Roboto';font-style:normal;font-weight:300;font-display:swap;src:url(https://fonts.gstatic.com/s/roboto/v29/KFOlCnqEu92Fr1MmSU5fBBc4AMP6lQ.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;}@font-face{font-family:'Roboto';font-style:normal;font-weight:400;font-display:swap;src:url(https://fonts.gstatic.com/s/roboto/v29/KFOmCnqEu92Fr1Mu72xKKTU1Kvnz.woff2) format('woff2');unicode-range:U+0460-052F, U+1C80-1C88, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F;}@font-face{font-family:'Roboto';font-style:normal;font-weight:400;font-display:swap;src:url(https://fonts.gstatic.com/s/roboto/v29/KFOmCnqEu92Fr1Mu5mxKKTU1Kvnz.woff2) format('woff2');unicode-range:U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;}@font-face{font-family:'Roboto';font-style:normal;font-weight:400;font-display:swap;src:url(https://fonts.gstatic.com/s/roboto/v29/KFOmCnqEu92Fr1Mu7mxKKTU1Kvnz.woff2) format('woff2');unicode-range:U+1F00-1FFF;}@font-face{font-family:'Roboto';font-style:normal;font-weight:400;font-display:swap;src:url(https://fonts.gstatic.com/s/roboto/v29/KFOmCnqEu92Fr1Mu4WxKKTU1Kvnz.woff2) format('woff2');unicode-range:U+0370-03FF;}@font-face{font-family:'Roboto';font-style:normal;font-weight:400;font-display:swap;src:url(https://fonts.gstatic.com/s/roboto/v29/KFOmCnqEu92Fr1Mu7WxKKTU1Kvnz.woff2) format('woff2');unicode-range:U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+1EA0-1EF9, U+20AB;}@font-face{font-family:'Roboto';font-style:normal;font-weight:400;font-display:swap;src:url(https://fonts.gstatic.com/s/roboto/v29/KFOmCnqEu92Fr1Mu7GxKKTU1Kvnz.woff2) format('woff2');unicode-range:U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;}@font-face{font-family:'Roboto';font-style:normal;font-weight:400;font-display:swap;src:url(https://fonts.gstatic.com/s/roboto/v29/KFOmCnqEu92Fr1Mu4mxKKTU1Kg.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;}@font-face{font-family:'Roboto';font-style:normal;font-weight:500;font-display:swap;src:url(https://fonts.gstatic.com/s/roboto/v29/KFOlCnqEu92Fr1MmEU9fCRc4AMP6lbBP.woff2) format('woff2');unicode-range:U+0460-052F, U+1C80-1C88, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F;}@font-face{font-family:'Roboto';font-style:normal;font-weight:500;font-display:swap;src:url(https://fonts.gstatic.com/s/roboto/v29/KFOlCnqEu92Fr1MmEU9fABc4AMP6lbBP.woff2) format('woff2');unicode-range:U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;}@font-face{font-family:'Roboto';font-style:normal;font-weight:500;font-display:swap;src:url(https://fonts.gstatic.com/s/roboto/v29/KFOlCnqEu92Fr1MmEU9fCBc4AMP6lbBP.woff2) format('woff2');unicode-range:U+1F00-1FFF;}@font-face{font-family:'Roboto';font-style:normal;font-weight:500;font-display:swap;src:url(https://fonts.gstatic.com/s/roboto/v29/KFOlCnqEu92Fr1MmEU9fBxc4AMP6lbBP.woff2) format('woff2');unicode-range:U+0370-03FF;}@font-face{font-family:'Roboto';font-style:normal;font-weight:500;font-display:swap;src:url(https://fonts.gstatic.com/s/roboto/v29/KFOlCnqEu92Fr1MmEU9fCxc4AMP6lbBP.woff2) format('woff2');unicode-range:U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+1EA0-1EF9, U+20AB;}@font-face{font-family:'Roboto';font-style:normal;font-weight:500;font-display:swap;src:url(https://fonts.gstatic.com/s/roboto/v29/KFOlCnqEu92Fr1MmEU9fChc4AMP6lbBP.woff2) format('woff2');unicode-range:U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;}@font-face{font-family:'Roboto';font-style:normal;font-weight:500;font-display:swap;src:url(https://fonts.gstatic.com/s/roboto/v29/KFOlCnqEu92Fr1MmEU9fBBc4AMP6lQ.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;}</style>
    <style type="text/css">@font-face{font-family:'Material Icons';font-style:normal;font-weight:400;src:url(https://fonts.gstatic.com/s/materialicons/v128/flUhRq6tzZclQEJ-Vdg-IuiaDsNcIhQ8tQ.woff2) format('woff2');}.material-icons{font-family:'Material Icons';font-weight:normal;font-style:normal;font-size:24px;line-height:1;letter-spacing:normal;text-transform:none;display:inline-block;white-space:nowrap;word-wrap:normal;direction:ltr;-webkit-font-feature-settings:'liga';-webkit-font-smoothing:antialiased;}</style>
<style>.mat-typography{font:400 14px/20px Roboto,Helvetica Neue,sans-serif;letter-spacing:normal}html,body{height:100%}body{margin:0;font-family:Roboto,Helvetica Neue,sans-serif}</style><link rel="stylesheet" href="styles.9c0548760c8b22be.css" media="print" onload="this.media='all'"><noscript><link rel="stylesheet" href="styles.9c0548760c8b22be.css"></noscript></head>

<body class="mat-typography">
    <app-root></app-root>
 
<script src="runtime.397c3874548e84cd.js" type="module">
</script><script src="polyfills.2145acc81d0726ab.js" type="module">
</script><script src="main.a655dca28148b7e2.js" type="module"></script>

</body></html>

nginx.conf file

worker_processes 4;

events { worker_connections 1024; }

http {
    server {
        listen 8080;
        include /etc/nginx/mime.types;

  location /issuertcoetools {
    root /usr/share/nginx/html;
    index index.html index.htm;
    try_files $uri $uri/ /index.html =404;
  }
}
}

Answers

- Leo
- May 19, 2022 at 7:48 pm
- 0 votes
0
This error usually happens because you deployment was into a subfolder, so it seems like Angular is fetching you app directly from your base URL, so your html is found when you go to your domain.com/mysubfolder/index.html, but as the Angular fetches your resources from domain.com/index.html instead of domain.com/mysubfolder/index.html; I’m pretty sure this is the cause of your issue. You can resolve it building your app with:
```
ng build --prod --base-href mysubfolder
```
Login or Signup to reply.

- WILMERAYALAGARCIA
- August 6, 2022 at 10:27 pm
- 0 votes
0
Check include /etc/nginx/mime.types; In the NGINX conf, that path may have an error, lean on the logs (nginx).

Login or Signup to reply.

- SachinChillal
- October 1, 2022 at 4:24 am
- 0 votes
0
I was trying to add an Angular app in a subdirectory.

@Leo‘s
answer is correct.
I made it manually by changing the base reference in index.html.

From <base href=""> to <base href="http://subdomain.domain.com/subdirectory/"> and it worked!
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>Website</title>  <base href="http://subdomain.domain.com/subdirectory/"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="icon" type="image/x-icon" href="favicon.ico"> <body>...</body> </html>
Login or Signup to reply.

- goldax
- January 9, 2023 at 7:12 am
- 0 votes
0
when you host angular projects on virtual directory, you need to add:
```
 APP_BASE_HREF, useValue: '/YOUR VIRTUAL DIRECTORY NAME'
```
to "app.module.ts" in "NgModule" section. like this:
```
import { APP_BASE_HREF } from '@angular/common';

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    AppRoutingModule,
    NgbModule
  ],
  providers: [{provide: APP_BASE_HREF, useValue: '/YOUR_VIRTUALDIRECTORY_NAME'}],
  bootstrap: [AppComponent]
})
```
and rebuild your project.

don’t forget to use:
```
import { APP_BASE_HREF } from '@angular/common';
```
you can see about this, on https://angular.io/api/common/APP_BASE_HREF

and finally run:
```
ng build --base-href  YOUR_VIRTUAL_DIRECTORY_NAME
```
have a good time!
Login or Signup to reply.

- Franco
- January 25, 2023 at 12:50 pm
- 0 votes
0
Solution:

Go to angular.json and update the outputPath parameter to just dist instead of dist/YourAppName. Now you can use ng build --configuration production to build your app.

Explanation:

The problem is that when you run the command ng build --configuration production then the solution is outputted into dist/YourAppName and then paths get’s broken because Angular think your app is in your root folder, but it is in root/YourAppName. Doing the above puts your app in root folder.

Login or Signup to reply.

- ThomasDavidKehoe
- April 16, 2023 at 12:17 am
- 0 votes
0
I commented out <base href="/"> from index.html and my app displays on the server.

And I changed the outputPath in angular.json to not include the subdomain: "outputPath": "dist",.

I also changed the public setting in firebase.json to include the subdomain: "public": "dist/en-US",.

Why the different settings in angular.json and firebase.json? Before these changes, I had angular.json set to "outputPath": "dist/language-two13",. The result was that ng build transpiled my Angular project into dist/language-two13/en-US. By changing this setting I got rid of one subdomain.

In the browser neither subdomain appeared in the URL.

Where the en-US subdomain is coming from I have no idea. I’m using Transloco for i18n but searching through transloco-root.module.ts I see en and es as the languages of my project, not en-US. I searched my entire app and found only a few instances of en-US, only in code that corrects this to en, and never in settings that would affect the transpiler.

I tried switching the default language of Transloco from en to es. Nada cambios…no changes.

I tried commenting out Transloco in app.module.ts but Angular won’t compile.

I tried moving my files from dist/en-US/ to dist, removing the en-US folder, changing firebase.json to "public": "dist", and commenting <base href="/"> back into index.html, and deploying to Firebase Hosting. This works fine.

In conclusion, angular.json is set to transpile without a subdomain, but the en-US subdomain is magically getting inserted, so I set firebase.json to correct for this weird behavior.

My hat is off to dev-ops professionals who deal with this stuff all day!

Login or Signup to reply.