How to allow CORS in react.js?

Question

I\'m using Reactjs and using API through AJAX in javascript. How can we resolve this issue? Previously I used CORS tools, but now I need to enable CORS.

Answer 1

Use this.

app.use((req,res, next)=>{
    res.setHeader('Access-Control-Allow-Origin',"http://localhost:3000");
    res.setHeader('Access-Control-Allow-Headers',"*");
    res.header('Access-Control-Allow-Credentials', true);
    next();
});