Javascript's Snippets

simple-ajax.js

const $ajax = (url, data) => new function() {
    this.success
    this.error
    
    let xhr = new XMLHttpRequest();
    xhr.onreadystatechange = e => {
        if (xhr.readyState == 4) {
            if(xhr.status == 200) this.success(xhr.responseText);
            else this.error(xhr.status);
        }
    }
    
    this.get = (s, e) => {
        if(s) this.success = s;
        if(e) this.error = e;
        
        xhr.open('GET', url + '?data=' + JSON.stringify(data), true);
        xhr.send()
    }
    
    this.put = (s, e) => {
        if(s) this.success = s;
        if(e) this.error = e;
        
        xhr.open('PUT', url, true);
        xhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
        xhr.setRequestHeader('X-HTTP-Method-Override', 'PUT');
        xhr.send(JSON.stringify(data))
    }        
    
    this.post = (s, e) => {
        if(s) this.success = s;
        if(e) this.error = e;
        
        xhr.open('POST', url, true);
        xhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
        xhr.send(JSON.stringify(data))
    }
            
    this.delete = (s, e) => {
        if(s) this.success = s;
        if(e) this.error = e;

        xhr.open('DELETE', url, true);    
        xhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');    
        xhr.setRequestHeader('X-HTTP-Method-Override', 'DELETE');
        xhr.send(JSON.stringify(data));
    }
}

sleep-without-promise.js

//ONLY FOR DEVELOPMENT ENVIRONMENT
const sleep = milliseconds => {
  const now = new Date().getTime();
  while(new Date().getTime() < now + milliseconds);
}