如果你只需要针对现代浏览器，很多功能使用原生的 JavaScript 就可以实现。
DOM Selectors
//jQuery
var ele = $("#id .class");
//native javascript
var ele = document.querySelectorAll("#id .class");
//or native javascript
var ele1 = document.getElementById("id");
var ele = ele1.getElementsByClassName("ele1");
DOM 操作
Create elements
//jQuery
var newEl = $('<div />');
//native javascript
var newEl = document.createElement('div');
Append
//jQuery
#("#container").append("<span>content</span>");
//native javascript
var span = document.createElement("span");
span.appendChild(document.createTextNode("content"));
document.getElementById("container").appendChild(span);
//or native javascript, jQuery uses the native innerHTML method
document.getElementById("container").innerHTML += "<span>content</span>";
remove all child nodes
//jQuery
$("container").empty();
//The native equivalent using innerHTML
document.getElementById("container").innerHTML = null;
//or native javascript using removeChild
var c = document.getElementById("container");
while(c.lastChild) c.removeChild(c.lastChild);
remove the whole elemet from the DOM
//jQuery
$("#container").remove();
//native javascript
var c = document.getElementById("container");
c.parentNode.removeChild(c);
Clone the whole element from the DOM
//jQuey
var cloneEl = $("#container").clone();
//native javasript
var cloneEl = document.getElementById("container").cloneNode(true);
parent
//jQuery
$('#el').parent();
//ntive javascript
document.getElementById('el').parentNode;
prev/next element
//jQuery
$("#el").prev();
$("#el").next();
//native javascript
document.getElementById("el").previousElementSibling;
document.getElementById("el").nexElementSibling;
css manipulation
class manipulation
//jQuery
$("#ele").addClass("myclass");
$("#ele").removeClass("myclass");
$("#ele").toggleClass("myclass");
//native javascript
function addClasses(node, cla){
if(!node.length) node = [node];
for(var n=0,m=node.length;n<m;n++){
if((" "+node[n].className+" ").indexOf(" "+cla+" ") <0){
node[n].className += " "+cla;
}
}
} function removeClass(node, cla){
if(!node.length) node = [node];
for(var n=0,m=node.length;n<m;n++){
if((" "+node[n].className+" ").indexOf(" "+cla+" ") >= 0){
node[n].className = (" "+node[n].className+" ").replace(" "+cla+" ", " ").replace( /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, "" );
}
} }
//remove myclass to all nodes
removeClass(document.querySelectorAll("p"), "myclass"); function toggleClass(node, cla){
if(!node.length) node = [node];
for(var n=0,m=node.length;n<m;n++){
if((" "+node[n].className+" ").indexOf(" "+cla+" ") >= 0){
node[n].className = (" "+node[n].className+" ").replace(" "+cla+" ", " ").replace( /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, "" );
}else{
node[n].className += " "+cla;
}
}
}
//toggle myclass to all nodes
toggleClass(document.querySelectorAll("p"), "myclass");
//or native javascript using classList
document.getElementById("ele").classList.add("myclass");
document.getElementById("ele").classList.remove("myclass");
document.getElementById("ele").classList.toggle("myclass");
style manipulation
//jQuery
$("#ele").css({
color: "#c00"
})
//native javascript
var ele = document.getElementById("ele");
ele.style.color = "#c00";
set/get attribute
//jQuery
$('#ele').attr('key', 'value');
$('#ele').attr('key');
//native javascript
document.getElementById("ele").setAttribute('key', 'value');
document.getElementById("ele").getAttribute("key");
event handling
document ready
//jQuery
$(start)
//native javascript
document.addEventListener("DOMContentLoaded", start);
forEach
//jQuery
$("p").each(function(i){
console.log("index " + i + ": " + this);
});
//native javascript
[].forEach.call(document.getElementsByTagName("p"),function(obj,i){consol.log("index "+i+": "+obj)})
Events
//jQuery
$('.el').on('event', functio(){ });
//Native javascript
[].forEach.call(document.querySelectorAll('.el'), function(el){
el.addEventListener('event', function(){
}, false);
});
Ajax
//jQuery
$.get('url', function(data){
});
$.post('url', {data: data}, function(data){ });
//native javascript
//get
var xhr = new XMLHttpRequest();
xhr.open('GET', url, true);
xhr.onreadystatechange = function(){ }
xhr.send();
//post
var xhr = new XMLHttpRequest();
xhr.open('POST', url, true);
xhr.onreadystatechange = function(){ }
xhr.send({data: data});
相关文章：
Native JavaScript Equivalents of jQuery Methods: the DOM and Forms
Native JavaScript Equivalents of jQuery Methods: Events, Ajax and Utilities