Fix javascript heap out of memory error when running local SPFx web server via gulp

If you develop SPFx web part for Sharepoint and run local web server on dev env:

gulp serve –nobrowser

then you may face with famous “JaavaScript heap out of memory” error:

In order to avoid this error we need to increase nodejs heap size. On Windows it can be done by the following method:

1. Run the following command in your terminal client:
   setx -m NODE_OPTIONS "--max-old-space-size=8192"
   
   (after that NOTE_OPTIONS should be added to PC > Advanced properties > Environment variables)
2. Restart terminal session which is used for running gulp to ensure that new env variables will be applied.
3. Run web server:
        gulp serve --nobrowser

After that your solution should be built without heap out of memory error.