Step 1: Create a JSON File
Put your JSON file in the project directory. For example, src/assets/json/data.json
{
  "key": "value"
}
Step 2: Configure tsconfig.json
Update tsconfig.json, under compilerOptions
{
  "compilerOptions": {
    "resolveJsonModule": true,
    "esModuleInterop": true
  }
}
resolveJsonModule: Enables importing JSON files.
Step 3: Import the JSON File
You can now import the JSON file in your components, services, or directives like so:
import data from '././assets/json/data.json';
console.log(data.key); // Access JSON properties