[Solved] CORS error :Request header field Authorization is not allowed by Access-Control-Allow-Headers in preflight response

Hello Guys, How are you all? Hope You all Are Fine. Today I am trying to make request But I am facing following error: CORS error :Request header field Authorization is not allowed by Access-Control-Allow-Headers in preflight response in JavaScript. So Here I am Explain to you all the possible solutions here.

Without wasting your time, Let’s start This Article to Solve This Error.

How CORS error :Request header field Authorization is not allowed by Access-Control-Allow-Headers in preflight response Error Occurs ?

I am trying to make request But I am facing following error.

CORS error :Request header field Authorization is not allowed by Access-Control-Allow-Headers in preflight response

How To Solve CORS error :Request header field Authorization is not allowed by Access-Control-Allow-Headers in preflight response Error ?

Solution 1: Set Access-Control-Allow-Methods

You Need to set Access-Control-Allow-Methods in your header just like this.

 res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE,PATCH,OPTIONS');

Now, Your error must be solved.

Solution 2: Use cors

If You are using nodejs then Just install cors with help of this command.

npm install cors --save

Then, add following code in your app.js or server.js

var express = require('express');
var app = express();

var cors = require('cors');
var bodyParser = require('body-parser');

//enables cors
app.use(cors({
  'allowedHeaders': ['sessionId', 'Content-Type'],
  'exposedHeaders': ['sessionId'],
  'origin': '*',
  'methods': 'GET,HEAD,PUT,PATCH,POST,DELETE',
  'preflightContinue': false
}));

require('./router/index')(app);

Now, Your error must be solved.

Summary

It’s all About this issue. Hope all solution helped you a lot. Comment below Your thoughts and your queries. Also, Comment below which solution worked for you?

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