access to xmlhttprequest has been blocked by cors policy node js

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Maite
16 Jan 2018
1/*
2npm i cors
3or
4 yarn add cors
5then in your node app
6*/
7const cors = require('cors');
8const corsOptions ={
9    origin:'http://localhost:3000', 
10    credentials:true,            //access-control-allow-credentials:true
11    optionSuccessStatus:200
12}
13app.use(cors(corsOptions));
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