Catch block not working in node fetch

Question

Trying to learn, Javascript. Pardon if this is really a basic thin i am missing.

I am trying to run node-fetch to a wrong url, and i expect that it should be catched and log my appropriate message. However when i run this file through node, it gives me uncatched error

    const fetch = require('node-fetch');

    fetch('http://api.icnd.com/jokes/random/10')
        .then(response => {
            response.json().then((data) => {
                console.log(data)
            });
        }).
        catch(error => {
            console.log('There is some error');
        });



(node:864) UnhandledPromiseRejectionWarning: FetchError: invalid json response body at http://api.icnd.com/jokes/random/10 reason: Unexpected token < in JSON at position 0
    at /Users/raheel/code/js-tutorial/node_modules/node-fetch/lib/index.js:254:32
    at <anonymous>
    at process._tickCallback (internal/process/next_tick.js:118:7)
(node:864) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)
(node:864) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

Answer 1

Because you are not throwing a specific error for catch block to catch.

const fetch = require('node-fetch');

fetch('http://api.icnd.com/jokes/random/10/api/1')
  .then(response => {
    if(response.ok){
      response.json().then((data) => {
        console.log(data)
      });  
    }else{
      throw 'There is something wrong'
    }
  }).
  catch(error => {
      console.log(error);
  });