create-react-app is deployed on Heroku but page is blank

Question

I'm trying to deploy a react app on heroku but after deploying it on heroku its showing blank page,I've also created this app using buildpack mars/create-react-app

This is what I'm getting on deployed project:

Here's my package.json file:

    {
      "name": "covid-19",
      "version": "0.1.0",
      "private": true,
      "homepage": "covid-19-stats-by-anny-v3",
      "dependencies": {
        "@material-ui/core": "^4.11.0",
        "@material-ui/icons": "^4.9.1",
        "@testing-library/jest-dom": "^4.2.4",
        "@testing-library/react": "^9.5.0",
        "@testing-library/user-event": "^7.2.1",
        "axios": "^0.19.2",
        "express": "^4.17.1",
        "fetch": "^1.1.0",
        "gh-pages": "^3.1.0",
        "material-table": "^1.65.0",
        "mui-datatables": "^3.3.1",
        "react": "^16.13.1",
        "react-dom": "^16.13.1",
        "react-social-icons": "^4.1.0"
      },
      "scripts": {
        "start": "react-scripts start",
        "predeploy": "npm run build",
        "build": "react-scripts build",
        "test": "react-scripts test",
        "eject": "react-scripts eject"
      },
      "eslintConfig": {
        "extends": "react-app"
      },
      "browserslist": {
        "production": [
          ">0.2%",
          "not dead",
          "not op_mini all"
        ],
        "development": [
          "last 1 chrome version",
          "last 1 firefox version",
          "last 1 safari version"
        ]
      },
      "devDependencies": {
        "react-scripts": "^3.4.1"
      }
    }

Answer 1

The reason behind this white screen is JavaScript files are loaded into the browser.

There is the publicPath setting in your Webpack configuration to tell an app what its root path is. In our example, that would be https://www.yourwebsite.com/

If set correctly, it will base links like above from that URL – and your application will load like expected.

Put this information is package.json file add these lines after version in package.json

"homepage":"your app link"

and build the application again it will work.