Custom HTTP library version 2 using Fetch & Promise

app.js

let instance = new azHTTPLibrary();

// Make get HTTP request
// instance.get('https://jsonplaceholder.typicode.com/posts')
// .then( res => console.log(res) )
// .catch( err => console.log(err) );

// Make post HTTP request
// instance.post('https://jsonplaceholder.typicode.com/users', { name: 'azadd', username: 'ab_azad' } )
// .then( res => console.log(res) )
// .catch( err => console.log('something wrong') );

// Make PUT HTTP request
// instance.put('https://jsonplaceholder.typicode.com/users/2', { name: 'azadd', username: 'ab_azad' } )
// .then( res => console.log(res) )
// .catch( err => console.log('something wrong') );

// Make Delete HTTP request
instance.delete('https://jsonplaceholder.typicode.com/users/2' )
.then( res => console.log(res) )
.catch( err => console.log('something wrong') );

azHTTPLibrary2.js

/**
 * azHTTPLibrary Library
 * Library for making HTTP requests
 *
 * @version 2.0.0
 **/

class azHTTPLibrary{
    // Make an HTTP GET reuest
    get( url ){
        return new Promise( (resolvee, rejectt) => {
            fetch( url )
            .then( res => res.json() )
            .then( data => resolvee(data) )
            .catch( err => rejectt(err) );
        });
    }

    // Make an HTTP POST reuest
    post( url, user ){
        return new Promise( (resolvee, rejectt) => {
            fetch( url, {
                method: 'POST',
                headers: {
                    'content-type': 'application/json'
                },
                body: JSON.stringify(user)
            })
            .then( res => res.json() )
            .then( data => resolvee(data) )
            .catch( err => rejectt(err) );
        });
    }

    // Make an HTTP PUT reuest
    put( url, user ){
        return new Promise( (resolvee, rejectt) => {
            fetch( url, {
                method: 'PUT',
                headers: {
                    'content-type': 'application/json'
                },
                body: JSON.stringify(user)
            })
            .then( res => res.json() )
            .then( data => resolvee(data) )
            .catch( err => rejectt(err) );
        });
    }

    // Make an HTTP DELETE reuest
    delete( url, user ){
        return new Promise( (resolvee, rejectt) => {
            fetch( url, {
                method: 'DELETE'
            })
            .then( res => res.json() )
            .then( () => resolvee('User deleted') )
            .catch( err => rejectt(err) );
        });
    }
}