【转】译- 26 个 jQuery使用技巧
- 禁用右键点击(Disable right-click)
$(document).bind("contextmenu",function(e){
return false;
});
});```
2. 禁用搜索文本框
```$(document).ready(function() {
$("input.text1").val("Enter your search text here");
textFill($('input.text1'));
});
function textFill(input){ //input focus text function
var originalvalue = input.val();
input.focus( function(){
if( $.trim(input.val()) == originalvalue ){ input.val(''); }
});
input.blur( function(){
if( $.trim(input.val()) == '' ){ input.val(originalvalue); }
});
}```
3. 新窗口打开链接
```$(document).ready(function() {
//Example 1: Every link will open in a new window
$('a[href^="http://"]').attr("target", "_blank");
//Example 2: Links with the rel="external" attribute will only open in a new window
$('a[@rel$='external']').click(function(){
this.target = "_blank";
});
});
// how to use
[open link](http://www.opensourcehunter.com)
- 检测浏览器
// Target Firefox 2 and above
if ($.browser.mozilla && $.browser.version >= "1.8" ){
// do something
}
// Target Safari
if( $.browser.safari ){
// do something
}
// Target Chrome
if( $.browser.chrome){
// do something
}
// Target Camino
if( $.browser.camino){
// do something
}
// Target Opera
if( $.browser.opera){
// do something
}
// Target IE6 and below
if ($.browser.msie && $.browser.version <= 6 ){
// do something
}
// Target anything above IE6
if ($.browser.msie && $.browser.version > 6){
// do something
}
});```
5. 预加载图片(Preloading images)
```$(document).ready(function() {
jQuery.preloadImages = function()
{
for(var i = 0; i<arguments.length; i++)="" {="" jquery("<img="">").attr("src", arguments[i]);
}
}
// how to use
$.preloadImages("image1.jpg");
});
- 样式筛选(CSS Style switcher)
$("a.Styleswitcher").click(function() {
//swicth the LINK REL attribute with the value in A REL attribute
$('link[rel=stylesheet]').attr('href' , $(this).attr('rel'));
});
// how to use
// place this in your header
// the links
[Default Theme](#)
[Red Theme](#)
[Blue Theme](#)
});```
7. 列高度相同
```$(document).ready(function() {
function equalHeight(group) {
tallest = 0;
group.each(function() {
thisHeight = $(this).height();
if(thisHeight > tallest) {
tallest = thisHeight;
}
});
group.height(tallest);
}
// how to use
$(document).ready(function() {
equalHeight($(".left"));
equalHeight($(".right"));
});
});
- 字体大小调整(Font resizing)
// Reset the font size(back to default)
var originalFontSize = $('html').css('font-size');
$(".resetFont").click(function(){
$('html').css('font-size', originalFontSize);
});
// Increase the font size(bigger font0
$(".increaseFont").click(function(){
var currentFontSize = $('html').css('font-size');
var currentFontSizeNum = parseFloat(currentFontSize, 10);
var newFontSize = currentFontSizeNum*1.2;
$('html').css('font-size', newFontSize);
return false;
});
// Decrease the font size(smaller font)
$(".decreaseFont").click(function(){
var currentFontSize = $('html').css('font-size');
var currentFontSizeNum = parseFloat(currentFontSize, 10);
var newFontSize = currentFontSizeNum*0.8;
$('html').css('font-size', newFontSize);
return false;
});
});
-
返回页面顶部(Smooth(animated) page scroll)
```$(document).ready(function() {
$(‘a[href*=#]').click(function() {
if (location.pathname.replace(/^//,'') == this.pathname.replace(/^//,'')
&& location.hostname == this.hostname) {
var $target = $(this.hash);
$target = $target.length && $target
|| $('[name=’ + this.hash.slice(1) +']');
if ($target.length) {
var targetOffset = $target.offset().top;
$(‘html,body’)
.animate({scrollTop: targetOffset}, 900);
return false;
}
}
});
// how to use
// place this where you want to scroll to
// the link
go to top
});
11. 获取鼠标的xy坐标(Get the mouse cursor x and y axis)
$(document).ready(function() {
$().mousemove(function(e){
//display the x and y axis values inside the div with the id XY
$('#XY').html(“X Axis : " + e.pageX + " | Y Axis " + e.pageY);
});
// how to use
<p>
});
</p>
12. 验证元素是否为空(Verify if an Element is empty)
```$(document).ready(function() {
if ($('#id').html()) {
// do something
}
});
- 替换元素(Replace a element)
$('#id').replaceWith('```
I have been replaced
<p>
‘); });
</p>
14. 延迟加载(jQuery timer callback functions)
```$(document).ready(function() {
window.setTimeout(function() {
// do something
}, 1000);
});```
15. 移除单词(Remove a word)
```$(document).ready(function() {
var el = $('#id');
el.html(el.html().replace(/word/ig, ""));
});```
<p>
</p>
16. 验证元素是否存在(Verify that an element exists in jQuery)
```$(document).ready(function() {
if ($('#id').length) {
// do something
}
});
- 使整个DIV可点击(Make the entire DIV clickable)
$("div").click(function(){
//get the url from href attribute and launch the url
window.location=$(this).find("a").attr("href"); return false;
});
// how to use```
[home](index.html)
<p>
});
</p>
18. id和class切换(Switch between classes or id’s when resizing the window)
```$(document).ready(function() {
function checkWindowSize() {
if ( $(window).width() > 1200 ) {
$('body').addClass('large');
}
else {
$('body').removeClass('large');
}
}
$(window).resize(checkWindowSize);
});
```$(document).ready(function() {
var cloned = $('#id').clone();
// how to use
<p>
});
</p>
20. 使元素居中屏幕(Center an element on the screen)
```$(document).ready(function() {
jQuery.fn.center = function () {
this.css("position","absolute");
this.css("top", ( $(window).height() - this.height() ) / 2+$(window).scrollTop() + "px");
this.css("left", ( $(window).width() - this.width() ) / 2+$(window).scrollLeft() + "px");
return this;
}
$("#id").center();
});```
21. 自定义选择器(Write our own selector)
```$(document).ready(function() {
$.extend($.expr[':'], {
moreThen1000px: function(a) {
return $(a).width() > 1000;
}
});
$('.box:moreThen1000px').click(function() {
// creating a simple js alert box
alert('The element that you have clicked is over 1000 pixels wide');
});
});
-
统计元素个数(Count a element)
```$(document).ready(function() {
$(“p”).size();
});```
-
自定义Bullets(Use Your Own Bullets)
```$(document).ready(function() {
$(“ul”).addClass(“Replaced”);
$(“ul > li”).prepend("‒ “);
// how to use
ul.Replaced { list-style : none; }
});```
- 引用google分发的jQuery(Let Google host jQuery for you)
//Example 1// Example 2:(the best and fastest way)
- 禁用jQuery动画(Disable jQuery animations)
jQuery.fx.off = true;
});```
26. 防止不兼容冲突(No conflict-mode)
```$(document).ready(function() {
var $jq = jQuery.noConflict();
$jq('#id').show();
});
jquery 速查表:
原贴地址:http://blog.csdn.net/sunboy_2050/article/details/8179162
- 原文作者:大鱼
- 原文链接:https://brucedone.com/archives/326/
- 版权声明:本作品采用知识共享署名-非商业性使用-禁止演绎 4.0 国际许可协议. 进行许可,非商业转载请注明出处(作者,原文链接),商业转载请联系作者获得授权。