Node.js + Express solves cross-domain problems

code

Open app.js file in var app = express(); Add this code below

app.all("*", (req, res, next) = {
  res.setHeader("Access-Control-Allow-Origin", "*");
  res.setHeader("Access-Control-Allow-Headers", "*");
  res.setHeader("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");
  res.setHeader("Access-Control-Allow-Credentials", "true")
  next()
});
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Pay attention to

Var app = express(); It is even better to add the above snippet after this line