Fixed Javascript Heap Out Of Memory Error.

Error:

FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed - process out of memory (Reactjs, Webpack, javascript Heap Out of memory )

Sol-1:

Run below command in case of "npm start" failed

 E:\Project\ui> node --max-old-space-size=8192 node_modules/webpack-dev-server/bin/webpack-dev-server.js

Run below command in case of "npm run build" failed

 E:\Project\ui> node --max-old-space-size=8192 node_modules/webpack/bin/webpack.js

Sol-2:

Do this if npm start failed. Open node_modules\.bin\webpack-dev-server.cmd and replace node "%~dp0\..\webpack-dev-server\bin\webpack-dev-server.js" %* with below line

 node --max-old-space-size=2048 node_modules/webpack-dev-server/bin/webpack-dev-server.js

Do this if npm start failed.Open node_modules\.bin\webpack.cmd and replace node "%~dp0\..\webpack-dev-server\bin\webpack.js" %* with below line

 node --max-old-space-size=2048 node_modules/webpack/bin/webpack.js

Sol-3:

Run below commands

 npm i increase-memory-limit

 increase-memory-limit

 npm i cross-env

Add below line in package.json under script object

  "fix-memory-limit": "cross-env LIMIT=2048 increase-memory-limit"

Add below line in package.json under devDependencies object

   "increase-memory-limit": "^1.0.3","cross-env": "^5.0.5"

Finally run below command

 npm run fix-memory-limit

Note- Since my project was running succesfullly with 2GB that's why i have set max space 2048 like this "--max-old-space-size=2048". You can increase as per your requirement.

Note- Try any one among above 3 Solutions. But Sol-3 is the best way to increase the heap size.