jQuery and un-jQuery

jQuery

$el.append(htmlString) $el.prepend(htmlString)

$newEl.insertBefore(queryString) $newEl.insertAfter(queryString)

un-jQuery

DOM 操作

选择器可以使用 querySelector 和 querySelectorAll, 但是这两个的性能太差了, 最好使用 getElementById, getElementsByTagName, getElementsByClassName

$el.val() 对应 el.value

获取 attr

$el.attr('id');
el.getAttribute('id);
el.setAttribute(attr, value)

parent and children

$el.children
$el.parent()
el.children
el.parentNode

设置 css

$el. css({color: '#000'});
el.style.color = '#000';
$el.css('color');
window.getComputedStyle(el)['color'];

特别地 $(el).hide(); // jQuery el.style.display = 'none'; // native $(el).show(); // jQuery el.style.dispaly = ''

设置 class

$el.addClass(className) // remove, has, toggle el.classList.add(className) // remove, contains, toggle

设置text Get text // jQuery $el.text(); // Native el.textContent;

Set text // jQuery $el.text(string);

// Native el.textContent = string;

设置html

Get HTML // jQuery $el.html();

// Native el.innerHTML; Set HTML // jQuery $el.html(htmlString);

// Native el.innerHTML = htmlString;

inserting html fragment to document

Have a look at insertAdjacentHTML

var element = document.getElementById("one");
var newElement = '<div id="two">two</div>'
element.insertAdjacentHTML( 'afterend', newElement )
// new DOM structure: <div id="one">one</div><div id="two">two</div>
position is the position relative to the element you are inserting adjacent to:

beforebegin Before the element itself

afterbegin Just inside the element, before its first child

beforeend Just inside the element, after its last child

afterend After the element itself

事件

绑定事件 $el.on(eventName, eventHandler); // jQuery el.addEventListener(eventName, eventHandler); // Native

解绑事件 $el.off(eventName, eventHandler); // jQuery el.removeEventListener(eventName, eventHandler); // Native

触发事件 // 用户事件 $(el).trigger('custom-event', {key1: 'data'}); // jQuery // Native, note that const event = new CustomEvent('custom-event', {detail: {key1: 'data'}}); el.dispatchEvent(event);

// 原生事件 $(el).trigger('change'); var ev = new Event("look", {"bubbles":true, "cancelable":false}); document.dispatchEvent(ev);

ajax

getJSON jQuery $.getJSON('/my/url', function(data) { }); IE9+ var request = new XMLHttpRequest(); request.open('GET', '/my/url', true); request.onload = function() { if (request.status >= 200 && request.status < 400) { // Success! var data = JSON.parse(request.responseText); } else { // We reached our target server, but it returned an error } }; request.onerror = function() { // There was a connection error of some sort }; request.send(); Post jQuery $.ajax({ type: 'POST', url: '/my/url', data: data }); IE8+ var request = new XMLHttpRequest(); request.open('POST', '/my/url', true); request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8'); request.send(data); Request jQuery $.ajax({ type: 'GET', url: '/my/url', success: function(resp) { }, error: function() { } }); IE9+ var request = new XMLHttpRequest(); request.open('GET', '/my/url', true); request.onload = function() { if (request.status >= 200 && request.status < 400) { // Success! var resp = request.responseText; } else { // We reached our target server, but it returned an error } }; request.onerror = function() { // There was a connection error of some sort }; request.send();

DOM Ready

https://github.com/oneuijs/You-Dont-Need-jQuery/blob/master/README.zh-CN.md http://youmightnotneedjquery.com/