Could not find plugin "proposal-numeric-separator" in angular app

Question

I am getting below error on running ng build --prod.

An unhandled exception occurred: [BABEL] /root/catch-up-enterprise/dist/polyfills-es5.8e4ba13e1c10f0a37bb4.js: Could not find plugin "proposal-numeric-separator". Ensure there is an entry in ./available-plugins.js for it. (While processing: "/root/catch-up-enterprise/node_modules/@angular-devkit/build-angular/node_modules/@babel/preset-env/lib/index.js") See "/tmp/ng-sg4wHH/angular-errors.log" for further details

Error log:

[root@localhost ~]# more /tmp/ng-sg4wHH/angular-errors.log
[error] Error: [BABEL] /root/catch-up-enterprise/dist/polyfills-es5.8e4ba13e1c10f0a37bb4.js: Could not find plugin "proposal-numeric-separator". Ensure there is an entry 
in ./available-plugins.js for it. (While processing: "/root/catch-up-enterprise/node_modules/@angular-devkit/build-angular/node_modules/@babel/preset-env/lib/index.js")
    at getPlugin (/root/catch-up-enterprise/node_modules/@angular-devkit/build-angular/node_modules/@babel/preset-env/lib/index.js:67:11)
    at Array.from.map.pluginName (/root/catch-up-enterprise/node_modules/@angular-devkit/build-angular/node_modules/@babel/preset-env/lib/index.js:258:62)
    at Array.map (<anonymous>)
    at _default (/root/catch-up-enterprise/node_modules/@angular-devkit/build-angular/node_modules/@babel/preset-env/lib/index.js:258:43)
    at /root/catch-up-enterprise/node_modules/@babel/helper-plugin-utils/lib/index.js:19:12
    at /root/catch-up-enterprise/node_modules/@babel/core/lib/config/full.js:179:14
    at Generator.next (<anonymous>)
    at Function.<anonymous> (/root/catch-up-enterprise/node_modules/@babel/core/lib/gensync-utils/async.js:26:3)
    at Generator.next (<anonymous>)
    at step (/root/catch-up-enterprise/node_modules/gensync/index.js:254:32)
    at evaluateAsync (/root/catch-up-enterprise/node_modules/gensync/index.js:284:5)
    at Function.errback (/root/catch-up-enterprise/node_modules/gensync/index.js:108:7)
    at errback (/root/catch-up-enterprise/node_modules/@babel/core/lib/gensync-utils/async.js:70:18)
    at async (/root/catch-up-enterprise/node_modules/gensync/index.js:183:31)
    at onFirstPause (/root/catch-up-enterprise/node_modules/gensync/index.js:209:13)
    at Generator.next (<anonymous>)

Steps tried: I thought the issue is missing proposal-numeric-separator module, so installed the module via below command

    npm i @babel/plugin-proposal-numeric-separator

Still the issue did not resolved, so tried the answer given in the similar issue, still same error occurred.

How to fix this issue?

score 40 · Accepted Answer · edited Mar 21 '20 at 20:52

40

Thanks to nicolo-ribaudo from issue8680

Adding the dependency @babel/compat-data": "7.8.0" fixed the issue for me.

vi package.json

    "dependencies": {
        "@babel/compat-data": "7.8.0",
        ...
    }

npm install

ng build --prod

edited Mar 21 '20 at 20:52

Dharman

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answered Mar 21 '20 at 18:29

Mohan

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Don't forget to run `npm i` after adding the dependency. – Stack Underflow May 01 '20 at 21:44

score 7 · Answer 2 · answered Mar 28 '20 at 21:29

7

It work's for me

Step 1: add in in your devDependencies: "@babel/compat-data": "7.8.0"

Step 2: run - npm install

answered Mar 28 '20 at 21:29

Abdullah

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Could not find plugin "proposal-numeric-separator" in angular app

2 Answers2