how to hide some content in react js code code example

Example 1: react hide source code

in package.json file as follows.
add GENERATE_SOURCEMAP=false to build

scripts: {
"build": "GENERATE_SOURCEMAP=false react-scripts build"
}

Example 2: hide react source

In in package.json (Windows)

"scripts": {
...
    "cleanBuild": "rimraf ./build/*",
    "build": "npm run cleanBuild && set \"GENERATE_SOURCEMAP=false\" && react-scripts build ",