CORS issue in Twitter OAuth API [duplicate]

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I am implementing twitter signin in angular5.
To get access token from client side i am following https://developer.twitter.com/en/docs/twitter-for-websites/log-in-with-twitter/guides/implementing-sign-in-with-twitter

I am getting Cross Origin error on accessing twitter apis.

Failed to load https://api.twitter.com/oauth/request_token: Response to preflight request doesn’t pass access control check: No ‘Access-Control-Allow-Origin’ header is present on the requested resource. Origin ‘http://localhost:4200’ is therefore not allowed access. The response had HTTP status code 400.

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1 Answer
1

The guide you are following is designed for use with server-side code.

It will not work for client-side JavaScript. Twitter provides a JavaScript API but it is more limited.

You should use server-side code instead. You could use Node.JS if you want to continue to use JavaScript.