how to do a simple fetch api and connect to browser code example

Example 1: How to Use the JavaScript Fetch API to Get Data

fetch('http://api.steampowered.com/ISteamUserStats/GetGlobalAchievementPercentagesForApp/v0002/?gameid=221380')
    .then(function(response) {
        return response.json();
    })
    .then(function(myJson) {
        console.log(JSON.stringify(myJson));
    });

Example 2: fetch api tutorial

fetch('https://api.github.com/users/manishmshiva', {
  method: "GET",
  headers: {"Content-type": "application/json;charset=UTF-8"}
})
.then(response => response.json()) 
.then(json => console.log(json)); 
.catch(err => console.log(err));