How to decrease size of vendor.js in angular 2,4,6,7,8,9,10,11,12,13,14,15,16?

Question

Angular CLI creates vendor.js and I don't know Why and What is the use of it?? Size of this file is about 3.2MB for a new app!!

Does this file contains Angular 6 Javascript Source?

Don't you think this is big file for loading on internet on low speed connections?

score 41 · Accepted Answer · edited Dec 20 '21 at 15:42

41

This file includes all libraries that you added into your project. If you build your app on production mode the file size will be smaller.

ng build --prod

edited Dec 20 '21 at 15:42

gunr2171

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answered Jul 10 '18 at 05:45

molikh

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After using Prod also my project size is 8Mb which getting more time to load. May i know what to do ?? – Anandan K Dec 20 '18 at 10:30
you mean files inside dist folder? you can check in that folder which file cause this. – molikh Dec 20 '18 at 12:17

score 35 · Answer 2 · answered Dec 06 '19 at 08:19

35

Try

ng build --prod --aot --vendor-chunk --common-chunk --delete-output-path --buildOptimizer

I reduced my vender.**.js fromm 12mb to 2mb

answered Dec 06 '19 at 08:19

DV Singh

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In Angular 9 , I can't find the vendor-chunk anywhere after running ng build --prod – eddy May 12 '20 at 22:12
check here: https://stackoverflow.com/questions/52179853/angular-should-i-use-the-vendorchunk-in-production – DV Singh May 24 '20 at 04:03
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Didn't change antyhing for me – Azoulay Jason Aug 25 '20 at 09:54
Nice. 8mb to 880Kbs – Sharon Watinsan Nov 07 '21 at 18:36

Nanotron · Answer 3 · 2019-03-13T12:51:36.753

9

Instead of decreasing it you can remove the file completely By specifying the --build-optimizer flag, the cli will disable this file from the build output.

The CLI will now bundle the vendor code into the main.js bundle, which will also enable uglification to reduce the size.

So you will see a small increase in the size of the main.js bundle which is minimal in comparison to the size of the vendor chunks

edited Mar 13 '19 at 12:51

answered Mar 13 '19 at 12:44

Nanotron

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I didn't give any difference in our build – Karthikeyan May 16 '19 at 09:34
1

No difference for me and vendor remains – Azoulay Jason Aug 25 '20 at 09:45
1

@Karthikeyan then check the version doc. Its automatically done in more recent versions of angular – Nanotron Aug 20 '21 at 09:14

score 6 · Answer 4 · answered Mar 27 '19 at 19:13

You may also want to update your build script in package.json to generate a prod build by default. I ran into this deploying to Heroku, since it runs 'npm build' automatically. By default, 'npm build' runs the following script:

ng build

If you update it to

ng build --prod

in package.json, then Heroku/AWS/Azure will create a production build on deployment instead.

score 5 · Answer 5 · answered Apr 29 '22 at 23:13

At the angular.json configuration file you need to change the values:

 "production": {
          "fileReplacements": [
            {
              "replace": "src/environments/environment.ts",
              "with": "src/environments/environment.prod.ts"
            }
          ],
          "aot": true,
          "optimization": true,
          "outputHashing": "all",
          "sourceMap": false,
          "namedChunks": false,
          "extractLicenses": true,
          "vendorChunk": false,
          "buildOptimizer": true

score 1 · Answer 6 · answered Mar 07 '23 at 08:00

In case you are using C# as backend with the default template, make sure to actually use the production configuration from your angular.json:

...
<Exec WorkingDirectory="$(SpaRoot)" Command="npm run build-prod" />
...

Since I switched to a newer angular version, --prod was no longer supported and I incorrectly assumed that ng build would default to production... Furthermore I had to adapt the production configuration as described by @edyrkaj

You could change the package.json as well by adding all those options to the build command, but I prefer the angular.json approach since it's a lot nicer to read and maintain in my opinion

How to decrease size of vendor.js in angular 2,4,6,7,8,9,10,11,12,13,14,15,16?

6 Answers6