How to enable fetch support in internet explorer?

Question

JavaScript

Need fetch support in IE... Googled, put polyfills and nothing helped. I get this error all the time . The following response comes in response . That is, in response.body - undefined. How to be? Everything works fine in Chrome and Firefox

Answer 1

function myFetch(params){
    return new Promise(function(resolve, reject){
       const xhr = new XMLHttpRequest();
        xhr.open(params.method, params.url, true);
        xhr.send();
        xhr.addEventListener('readystatechange', function(e){
              if( xhr.readyState != 4  ) return;
              if( xhr.status == 200 ){
                   resolve( xhr.responseText );
               } else{ reject( xhr.statusText ); }
        });
}
myFetch(//parameters...).then(//...... код который у Вас в then).

Answer 2

The issue is solved by polymorph
https://github.com/github/fetch

Answer 3

Are you trying to save a file? ie has truncated save support, you need to do it through save file