$.ajax({  type: ‘POST‘,  url: ‘/my/url‘,  data: data});

var request = new XMLHttpRequest();request.open(‘POST‘, ‘/my/url‘, true);request.send(data);

$.ajax({  type: ‘GET‘,  url: ‘/my/url‘,  success: function(resp) {  },  error: function() {  }});　

request = new XMLHttpRequest();request.open(‘GET‘, ‘/my/url‘, true);request.onreadystatechange = function() {  if (this.readyState === 4){    if (this.status >= 200 && this.status < 400){      // Success!      resp = this.responseText;    } else {      // Error :(    }  }}request.send();request = null;

$.getJSON(‘/my/url‘, function(data) {});

request = new XMLHttpRequest();request.open(‘GET‘, ‘/my/url‘, true);request.onreadystatechange = function() {  if (this.readyState === 4){    if (this.status >= 200 && this.status < 400){      // Success!      data = http://www.mamicode.com/JSON.parse(this.responseText);>

$(el).fadeIn();　　

function fadeIn(el) {  var opacity = 0;  el.style.opacity = 0;  el.style.filter = ‘‘;  var last = +new Date();  var tick = function() {    opacity += (new Date() - last) / 400;    el.style.opacity = opacity;    el.style.filter = ‘alpha(opacity=‘ + (100 * opacity)|0 + ‘)‘;    last = +new Date();    if (opacity < 1) {      (window.requestAnimationFrame && requestAnimationFrame(tick)) || setTimeout(tick, 16);    }  };  tick();}fadeIn(el);

$(el).show();$(el).hide();

el.style.display = ‘‘;el.style.display = ‘none‘;

$(el).addClass(className);

if (el.classList)  el.classList.add(className);else  el.className += ‘ ‘ + className;

$(el).before(htmlString);$(parent).append(el);$(el).after(htmlString);

el.insertAdjacentHTML(‘beforebegin‘, htmlString);parent.appendChild(el);el.insertAdjacentHTML(‘afterend‘, htmlString);

$(el).children();

var children = [];for (var i=el.children.length; i--;){  // Skip comment nodes on IE8  if (el.children[i].nodeType != 8)    children.unshift(el.children[i]);}

$(selector).each(function(i, el){});

function forEachElement(selector, fn) {  var elements = document.querySelectorAll(selector);  for (var i = 0; i < elements.length; i++)    fn(elements[i], i);}forEachElement(selector, function(el, i){});

$(el).empty();

while(el.firstChild)  el.removeChild(el.firstChild)

$(selector).filter(filterFn);

function filter(selector, filterFn) {  var elements = document.querySelectorAll(selector);  var out = [];  for (var i = elements.length; i--;) {    if (filterFn(elements[i]))      out.unshift(elements[i]);  }  return out;}filter(selector, filterFn);

$(el).find(selector);$(‘.my #awesome selector‘);

el.querySelectorAll(selector);document.querySelectorAll(‘.my #awesome selector‘);

$(el).attr(‘tabindex‘);$(el).html();$(‘<div>‘).append($(el).clone()).html();$(el).text();

el.getAttribute(‘tabindex‘);el.innerHTMLel.outerHTMLel.textContent || el.innerText

$(el).hasClass(className);

if (el.classList)  el.classList.contains(className);else  new RegExp(‘(^| )‘ + className + ‘( |$)‘, ‘gi‘).test(el.className);　

$(el).is(‘.my-class‘);

var matches = function(el, selector) {  var _matches = (el.matches || el.matchesSelector || el.msMatchesSelector || el.mozMatchesSelector || el.webkitMatchesSelector || el.oMatchesSelector);  if (_matches) {    return _matches.call(el, selector);  } else {    var nodes = el.parentNode.querySelectorAll(selector);    for (var i = nodes.length; i--;)      if (nodes[i] === el) {        return true;    }    return false;}matches(el, ‘.my-class‘);

$(el).prev();

// prevSibling can include text nodesfunction previousElementSibling(el) {  do { el = el.previousSibling; } while ( el && el.nodeType !== 1 );  return el;}el.previousElementSibling || previousElementSibling(el);

$(el).next();

// nextSibling can include text nodesfunction nextElementSibling(el) {  do { el = el.nextSibling; } while ( el && el.nodeType !== 1 );  return el;}el.nextElementSibling || nextElementSibling(el);

$(el).outerHeight()

function outerHeight(el, includeMargin){  var height = el.offsetHeight;  if(includeMargin){    var style = el.currentStyle || getComputedStyle(el);    height += parseInt(style.marginTop) + parseInt(style.marginBottom);  }   return height;}outerHeight(el, true);

$(el).outerWidth()

function outerWidth(el, includeMargin){  var height = el.offsetWidth;  if(includeMargin){    var style = el.currentStyle || getComputedStyle(el);    height += parseInt(style.marginLeft) + parseInt(style.marginRight);  }   return height;}outerWidth(el, true);

$.isArray(arr);

isArray = Array.isArray || function(arr) {  return Object.prototype.toString.call(arr) == ‘[object Array]‘;}isArray(arr);

$.map(array, function(value, index){})

function map(arr, fn) {  var results = []  for (var i = 0; i < arr.length; i++)    results.push(fn(arr[i], i))  return results}map(array, function(value, index){})