appleseed-iii/express-server

A simple Express Server to run on Localhost for testing

Fetch Failure Tester

install

yarn

run the app with

node index.js

usage from a js console

a succesful fetch

var response = await fetch("http://localhost:3000", {
  method: "GET",
}).then(resp => {return resp.json()});

an unsuccesful fetch

var response = await fetch("http://localhost:3000/failure", {
  method: "GET",
}).then(resp => {
  // first handle the status
  if (!resp.ok) {
      throw Error(resp.statusText);
  }
  return resp;
}).then(resp => {
  // then handle the json response
  return resp.json()
});
console.log("this won't fire bc we didn't catch");

catching that unsuccessful fetch v1

try{
  var response = await fetch("http://localhost:3000/failure", {
    method: "GET",
  }).then(resp => {
    // first handle the status
    if (!resp.ok) {
        throw Error(resp.statusText);
    }
    return resp;
  }).then(resp => {
    // then handle the json response
    return resp.json()
  });
  console.log("this won't fire");
} catch (e) {
  console.log(e.message);
}
console.log("this fires because we caught");

catching that unsuccessful fetch v2

var response = await fetch("http://localhost:3000/failure", {
  method: "GET",
}).then(resp => {
  // first handle the status
  if (!resp.ok) {
      throw Error(resp.statusText);
  }
  return resp;
}).then(resp => {
  // then handle the json response
  return resp.json()
  console.log("this won't fire");
}).catch(error => {
  // also catch any other errors
  console.log(error);

});
console.log("this fires because we caught");