JSFiddle - React, Tailwind, and code Playground

JavaScript

var getInfo = () => {
	fetch('https://jsonplaceholder.typicode.com/posts')
  	.then(response => response.json())
  	.then(json => {
    	const data = json.map(e => {
      	return e.userId
      })
      	.reduce((cum, cur) => {
        	cum[cur] = ++cum[cur] || 1;
        	return cum;
        }, {})
      console.log(data)
    	/* fetch('https://jsonplaceholder.typicode.com/todos') */
    })
}

getInfo()