【www.bbyears.com--jquery】
有些公司手机网站开发不用第三方的jquery或者zeptio，直接用原生的javascript。原生javascript功能是蛮强大的，只不过部分属性不支持IE8以下浏览器。下面对jquery相关方法，如何用js来实现，做一些简单总结。
元素操作
Add Class
//JQUERY
$(el).addClass(className);
//js
//谷歌浏览器，火狐浏览器，IE8+
if (el.classList)
el.classList.add(className);
else
el.className += " " + className;
//谷歌浏览器，火狐浏览器，IE10+
el.classList.add(className);
After
//JQUERY
$(el).after(htmlString);
//js 谷歌浏览器，火狐浏览器，IE8+
el.insertAdjacentHTML("afterend", htmlString);
Append
//JQUERY
$(parent).append(el);
//js谷歌浏览器，火狐浏览器，IE8+
parent.appendChild(el);
Before
//JQUERY
$(el).before(htmlString);
//js谷歌浏览器，火狐浏览器，IE8+
el.insertAdjacentHTML("beforebegin", htmlString);
Children
//JQUERY
$(el).children();
//js
//谷歌浏览器，火狐浏览器，IE8+
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]);
}
//谷歌浏览器，火狐浏览器，IE9+
el.children
Clone
//JQUERY
$(el).clone();
//谷歌浏览器，火狐浏览器，IE8+
el.cloneNode(true);
Contains
//JQUERY
$.contains(el, child);
//谷歌浏览器，火狐浏览器，IE8+
el !== child && el.contains(child);
Contains Selector
//JQUERY
$(el).find(selector).length;
//谷歌浏览器，火狐浏览器，IE8+
el.querySelector(selector) !== null
Each
//JQUERY
$(selector).each(function(i, el){
});
//js谷歌浏览器，火狐浏览器，IE8+
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){
});
//js谷歌浏览器，火狐浏览器，IE9+
var elements = document.querySelectorAll(selector);
Array.prototype.forEach.call(elements, function(el, i){
});
Empty
//JQUERY
$(el).empty();
//js谷歌浏览器，火狐浏览器，IE8+
while(el.firstChild)
el.removeChild(el.firstChild);
//js谷歌浏览器，火狐浏览器，IE9+
el.innerHTML = "";
过滤filter
//JQUERY
$(selector).filter(filterFn);
//谷歌浏览器，火狐浏览器，IE8+
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);
//谷歌浏览器，火狐浏览器，IE9+
Array.prototype.filter.call(document.querySelectorAll(selector), filterFn);
查找子元素
//JQUERY
$(el).find(selector);
//谷歌浏览器，火狐浏览器，IE8+
el.querySelectorAll(selector);
查找、选择器
//JQUERY
$(".my #awesome selector");
//谷歌浏览器，火狐浏览器，IE8+
document.querySelectorAll(".my #awesome selector");
获取属性值attr
//JQUERY
$(el).attr("tabindex");
//谷歌浏览器，火狐浏览器，IE8+
el.getAttribute("tabindex");
获取Html内容
//JQUERY
$(el).html();
//js
el.innerHTML
获取CSS样式
//JQUERY
$(el).css(ruleName);
//谷歌浏览器，火狐浏览器，IE9+
getComputedStyle(el)[ruleName];
获取文本内容
//JQUERY
$(el).text();
//谷歌浏览器，火狐浏览器，IE8+
el.textContent || el.innerText
//谷歌浏览器，火狐浏览器，IE9+
el.textContent
Has Class
//JQUERY
$(el).hasClass(className);
//谷歌浏览器，火狐浏览器，IE8+
if (el.classList)
el.classList.contains(className);
else
new RegExp("(^| )" + className + "( |$)", "gi").test(el.className);
//谷歌浏览器，火狐浏览器，IE10+
el.classList.contains(className);
元素比较
JQUERY
$(el).is($(otherEl));
//js
el === otherEl
比较类名
//JQUERY
$(el).is(".my-class");
//谷歌浏览器，火狐浏览器，IE8+
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");
//谷歌浏览器，火狐浏览器，IE9+
var matches = function(el, selector) {
return (el.matches || el.matchesSelector || el.msMatchesSelector || el.mozMatchesSelector || el.webkitMatchesSelector || el.oMatchesSelector).call(el, selector);
};
matches(el, ".my-class");
Next
//JQUERY
$(el).next();
//谷歌浏览器，火狐浏览器，IE8+
// nextSibling can include text nodes
function nextElementSibling(el) {
do { el = el.nextSibling; } while ( el && el.nodeType !== 1 );
return el;
}
el.nextElementSibling || nextElementSibling(el);
//谷歌浏览器，火狐浏览器，IE9+
el.nextElementSibling
Offset
//JQUERY
$(el).offset();
//js谷歌浏览器，火狐浏览器，IE8+
var rect = el.getBoundingClientRect()
{
top: rect.top + document.body.scrollTop,
left: rect.left + document.body.scrollLeft
}
Outer Width
//JQUERY
$(el).outerWidth();
//js
el.offsetWidth
Parent
//JQUERY
$(el).parent();
//js
el.parentNode
Position
//JQUERY
$(el).position();
//js
{left: el.offsetLeft, top: el.offsetTop}
Prev
//JQUERY
$(el).prev();
//谷歌浏览器，火狐浏览器，IE8+
// prevSibling can include text nodes
function previousElementSibling(el) {
do { el = el.previousSibling; } while ( el && el.nodeType !== 1 );
return el;
}
el.previousElementSibling || previousElementSibling(el);
//谷歌浏览器，火狐浏览器，IE9+
el.previousElementSibling
Remove
//JQUERY
$(el).remove();
//js谷歌浏览器，火狐浏览器，IE8+
el.parentNode.removeChild(el);
Remove Class
//JQUERY
$(el).removeClass(className);
//js谷歌浏览器，火狐浏览器，IE8+
if (el.classList)
el.classList.remove(className);
else
el.className = el.className.replace(new RegExp("(^|\\b)" + className.split(" ").join("|") + "(\\b|$)", "gi"), " ");
//谷歌浏览器，火狐浏览器，IE10+
el.classList.remove(className);
Replace From Html
//JQUERY
$(el).replaceWith(string);
//谷歌浏览器，火狐浏览器，IE8+
el.outerHTML = string;
Set Attributes
//JQUERY
$(el).attr("tabindex", 3);
//谷歌浏览器，火狐浏览器，IE8+
el.setAttribute("tabindex", 3);
Set Html
//JQUERY
$(el).html(string);
//谷歌浏览器，火狐浏览器，IE8+
el.innerHTML = string;
Set Style
//JQUERY
$(el).css("border-width", "20px");
//谷歌浏览器，火狐浏览器，IE8+
// Use a class if possible
el.style.borderWidth = "20px";
Set Text
//JQUERY
$(el).text(string);
//谷歌浏览器，火狐浏览器，IE8+
if (el.textContent !== undefined)
el.textContent = string;
else
el.innerText = string;
//谷歌浏览器，火狐浏览器，IE9+
el.textContent = string;
Siblings
//JQUERY
$(el).siblings();
//谷歌浏览器，火狐浏览器，IE8+
var siblings = Array.prototype.slice.call(el.parentNode.children);
for (var i = siblings.length; i--;) {
if (siblings[i] === el) {
siblings.splice(i, 1);
break;
}
}
//谷歌浏览器，火狐浏览器，IE9+
Array.prototype.filter.call(el.parentNode.children, function(child){
return child !== el;
});
Toggle Class
//JQUERY
$(el).toggleClass(className);
//谷歌浏览器，火狐浏览器，IE8+
if (el.classList) {
el.classList.toggle(className);
} else {
var classes = el.className.split(" ");
var existingIndex = -1;
for (var i = classes.length; i--;) {
if (classes[i] === className)
existingIndex = i;
}
if (existingIndex >= 0)
classes.splice(existingIndex, 1);
else
classes.push(className);
el.className = classes.join(" ");
}
//谷歌浏览器，火狐浏览器，IE9+
if (el.classList) {
el.classList.toggle(className);
} else {
var classes = el.className.split(" ");
var existingIndex = classes.indexOf(className);
if (existingIndex >= 0)
classes.splice(existingIndex, 1);
else
classes.push(className);
el.className = classes.join(" ");
}
//谷歌浏览器，火狐浏览器，IE10+
el.classList.toggle(className);
事件
Off
//JQUERY
$(el).off(eventName, eventHandler);
//谷歌浏览器，火狐浏览器，IE8+
function removeEventListener(el, eventName, handler) {
if (el.removeEventListener)
el.removeEventListener(eventName, handler);
else
el.detachEvent("on" + eventName, handler);
}
removeEventListener(el, eventName, handler);
//谷歌浏览器，火狐浏览器，IE9+
el.removeEventListener(eventName, eventHandler);
On
//JQUERY
$(el).on(eventName, eventHandler);
//谷歌浏览器，火狐浏览器，IE8+
function addEventListener(el, eventName, handler) {
if (el.addEventListener) {
el.addEventListener(eventName, handler);
} else {
el.attachEvent("on" + eventName, function(){
handler.call(el);
});
}
}
addEventListener(el, eventName, handler);
谷歌浏览器，火狐浏览器，IE9+
el.addEventListener(eventName, eventHandler);
Ready
//JQUERY
$(document).ready(function(){
});
//谷歌浏览器，火狐浏览器，IE8+
function ready(fn) {
if (document.readyState != "loading"){
fn();
} else if (document.addEventListener) {
document.addEventListener("DOMContentLoaded", fn);
} else {
document.attachEvent("onreadystatechange", function() {
if (document.readyState != "loading")
fn();
});
}
}
//谷歌浏览器，火狐浏览器，IE9+
function ready(fn) {
if (document.readyState != "loading"){
fn();
} else {
document.addEventListener("DOMContentLoaded", fn);
}
指定事件触发
//JQUERY
$(el).trigger("my-event", {some: "data"});
//js谷歌浏览器，火狐浏览器，IE9+
if (window.CustomEvent) {
var event = new CustomEvent("my-event", {detail: {some: "data"}});
} else {
var event = document.createEvent("CustomEvent");
event.initCustomEvent("my-event", true, true, {some: "data"});
}
el.dispatchEvent(event);
Trigger Native
//JQUERY
$(el).trigger("change");
//谷歌浏览器，火狐浏览器，IE8+
if (document.createEvent) {
var event = document.createEvent("HTMLEvents");
event.initEvent("change", true, false);
el.dispatchEvent(event);
} else {
el.fireEvent("onchange");
}
//谷歌浏览器，火狐浏览器，IE9+
// For a full list of event types: https://developer.mozilla.org/en-US/docs/Web/API/document.createEvent
var event = document.createEvent("HTMLEvents");
event.initEvent("change", true, false);
el.dispatchEvent(event);
技巧
Array Each
//JQUERY
$.each(array, function(i, item){
});
谷歌浏览器，火狐浏览器，IE8+
function forEach(array, fn) {
for (i = 0; i < array.length; i++)
fn(array[i], i);
}
forEach(array, function(item, i){
});
//谷歌浏览器，火狐浏览器，IE9+
array.forEach(function(item, i){
});
深度扩展
//JQUERY
$.extend(true, {}, objA, objB);
//谷歌浏览器，火狐浏览器，IE8+
var deepExtend = function(out) {
out = out || {};
for (var i = 1; i < arguments.length; i++) {
var obj = arguments[i];
if (!obj)
continue;
for (var key in obj) {
if (obj.hasOwnProperty(key)) {
if (typeof obj[key] === "object")
deepExtend(out[key], obj[key]);
else
out[key] = obj[key];
}
}
}
return out;
};
deepExtend({}, objA, objB);
proxy
//JQUERY
$.proxy(fn, context);
//谷歌浏览器，火狐浏览器，IE8+
fn.apply(context, arguments);
//谷歌浏览器，火狐浏览器，IE9+
fn.bind(context);
bind
//jQuery
$.extend({}, objA, objB);
//谷歌浏览器，火狐浏览器，IE8+
var extend = function(out) {
out = out || {};
for (var i = 1; i < arguments.length; i++) {
if (!arguments[i])
continue;
for (var key in arguments[i]) {
if (arguments[i].hasOwnProperty(key))
out[key] = arguments[i][key];
}
}
return out;
};
extend({}, objA, objB);
Index Of
//JQUERY
$.inArray(item, array);
//谷歌浏览器，火狐浏览器，IE8+
function indexOf(array, item) {
for (var i = 0; i < array.length; i++) {
if (array[i] === item)
return i;
}
return -1;
}
indexOf(array, item);
谷歌浏览器，火狐浏览器，IE9+
array.indexOf(item);
Is Array
//JQUERY
$.isArray(arr);
//谷歌浏览器，火狐浏览器，IE8+
isArray = Array.isArray || function(arr) {
return Object.prototype.toString.call(arr) == "[object Array]";
}
isArray(arr);
//谷歌浏览器，火狐浏览器，IE9+
Array.isArray(arr);
Map
//JQUERY
$.map(array, function(value, index){
});
//js谷歌浏览器，火狐浏览器，IE8+
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){
});
//谷歌浏览器，火狐浏览器，IE9+
array.map(function(value, index){
});
Now
//JQUERY
$.now();
//谷歌浏览器，火狐浏览器，IE8+
new Date().getTime();
//谷歌浏览器，火狐浏览器，IE9+
Date.now();
Parse Html
//JQUERY
$.parseHTML(htmlString);
谷歌浏览器，火狐浏览器，IE8+
var parseHTML = function(str) {
var el = document.createElement("div");
el.innerHTML = str;
return el.children;
};
parseHTML(htmlString);
谷歌浏览器，火狐浏览器，IE9+
var parseHTML = function(str) {
var tmp = document.implementation.createHTMLDocument();
tmp.body.innerHTML = str;
return tmp.body.children;
};
parseHTML(htmlString);
解析 Json
//JQUERY
$.parseJSON(string);
//谷歌浏览器，火狐浏览器，IE8+
JSON.parse(string);
Trim
//JQUERY
$.trim(string);
//谷歌浏览器，火狐浏览器，IE8+
string.replace(/^\s+|\s+$/g, "");
//谷歌浏览器，火狐浏览器，IE9+
string.trim();
Type
//JQUERY
$.type(obj);
谷歌浏览器，火狐浏览器，IE8+
Object.prototype.toString.call(obj)
.replace(/^\[object (.+)\]$/, "$1")
.toLowerCase();
ajax
新AJAX方法fetch()
基本Fetch用法
让我们先用一个例子来比较一下使用 XMLHttpRequest 和使用 fetch 之间的不同。我们要请求一个URL，获取JSON格式的返回结果。
原来的XMLHttpRequest
一个 XMLHttpRequest 请求需要两个监听器来捕捉 success 和 error 两种情形，而且需要调用 open() 和 send() 方法。
function reqListener() {
var data = JSON.parse(this.responseText);
console.log(data);
}
function reqError(err) {
console.log("Fetch Error :-S", err);
}
var oReq = new XMLHttpRequest();
oReq.onload = reqListener;
oReq.onerror = reqError;
oReq.open("get", "./api/some.json", true);
oReq.send();
Fetch方法：
我们的 fetch 请求的代码基本上是这样的：
fetch("./api/some.json")
.then(
function(response) {
if (response.status !== 200) {
console.log("Looks like there was a problem. Status Code: " +
response.status);
return;
}
// Examine the text in the response
response.json().then(function(data) {
console.log(data);
});
}
)
.catch(function(err) {
console.log("Fetch Error :-S", err);
});
用fetch执行表单数据提交
在WEB应用中，提交表单是非常常见的操作，用fetch来提交表单数据也是非常简洁。
fetch里提供了 method 和 body 参数选项。
fetch(url, {
method: "post",
headers: {
"Content-type": "application/x-www-form-urlencoded; charset=UTF-8"
},
body: "foo=bar&lorem=ipsum"
})
.then(json)
.then(function (data) {
console.log("Request succeeded with JSON response", data);
})
.catch(function (error) {
console.log("Request failed", error);
});
在Fetch请求里发送用户身份凭证信息
如果你想在fetch请求里附带cookies之类的凭证信息，可以将 credentials 参数设置成 “include” 值。
fetch(url, {
credentials: "include"
})
JSON
//JQUERY
$.getJSON("/my/url", function(data) {
});
//谷歌浏览器，火狐浏览器，IE8+
var request = new XMLHttpRequest();
request.open("GET", "/my/url", true);
request.onreadystatechange = function() {
if (this.readyState === 4) {
if (this.status >= 200 && this.status < 400) {
// Success!
var data = JSON.parse(this.responseText);
} else {
// Error :(
}
}
};
request.send();
request = null;
//谷歌浏览器，火狐浏览器，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();
//谷歌浏览器，火狐浏览器，IE10+
var request = new XMLHttpRequest();
request.open("GET", "/my/url", true);
request.onload = function() {
if (this.status >= 200 && this.status < 400) {
// Success!
var data = JSON.parse(this.response);
} 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
});
//谷歌浏览器，火狐浏览器，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() {
}
});
//谷歌浏览器，火狐浏览器，IE8+
var request = new XMLHttpRequest();
request.open("GET", "/my/url", true);
request.onreadystatechange = function() {
if (this.readyState === 4) {
if (this.status >= 200 && this.status < 400) {
// Success!
var resp = this.responseText;
} else {
// Error :(
}
}
};
request.send();
request = null;
//谷歌浏览器，火狐浏览器，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();
//谷歌浏览器，火狐浏览器，IE10+
var request = new XMLHttpRequest();
request.open("GET", "/my/url", true);
request.onload = function() {
if (this.status >= 200 && this.status < 400) {
// Success!
var resp = this.response;
} else {
// We reached our target server, but it returned an error
}
};
request.onerror = function() {
// There was a connection error of some sort
};
request.send();
特效
淡入淡出
//JQUERY
$(el).fadeIn();
//谷歌浏览器，火狐浏览器，IE8+
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);
//谷歌浏览器，火狐浏览器，IE9+
function fadeIn(el) {
el.style.opacity = 0;
var last = +new Date();
var tick = function() {
el.style.opacity = +el.style.opacity + (new Date() - last) / 400;
last = +new Date();
if (+el.style.opacity < 1) {
(window.requestAnimationFrame && requestAnimationFrame(tick)) || setTimeout(tick, 16)
}
};
tick();
}
fadeIn(el);
//谷歌浏览器，火狐浏览器，IE10+
el.classList.add("show");
el.classList.remove("hide");
.show {
transition: opacity 400ms;
}
.hide {
opacity: 0;
}
Hide
//JQUERY
$(el).hide();
//谷歌浏览器，火狐浏览器，IE8+
el.style.display = "none";
Show
//JQUERY
$(el).show();
//谷歌浏览器，火狐浏览器，IE8+
el.style.display = "";