make a http request with a custom header in typescript

index.ts
import axios, { AxiosRequestConfig } from 'axios';

const config: AxiosRequestConfig = {
  headers: { 'Custom-Header': 'Some value' },
};

axios.get('https://example.com/api/data', config)
  .then(response => {
    console.log(response.data);
  })
  .catch(error => {
    console.log(error);
  });
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The header field in the config object can be used to specify any custom headers that need to be sent with the request. In this case, the Custom-Header with a value of Some value is being sent along with the GET request to https://example.com/api/data.

The axios library is being used here for making the HTTP request. It is a popular client for making HTTP requests in JavaScript/TypeScript.