可以直接拿來用的15個jQuery程式碼片段
阿新 • • 發佈:2019-01-28
1.預載入圖片
from:http://snipplr.com/view/62552/mage-resize/
from:http://demos.flesler.com/jquery/scrollTo/
from:http://remysharp.com/2007/01/20/auto-populating-select-boxes-using-jquery-ajax/
from:http://snipplr.com/view/18606/
from:http://www.jquery4u.com/forms/jquery-function-clear-form-data/#.UI02J2knDF8
11.預防對錶單進行多次提交
(function($) { var cache = []; // Arguments are image paths relative to the current page. $.preLoadImages = function() { var args_len = arguments.length; for (var i = args_len; i--;) { var cacheImage = document.createElement('img'); cacheImage.src = arguments[i]; cache.push(cacheImage); } } })(jQuery)
2.
讓頁面中的每個元素都適合在移動裝置上展示
from : http://snipplr.com/view/66826var scr = document.createElement('script'); scr.setAttribute('src', 'https://ajax.googleapis.com/ajax/libs/jquery/1.5.2/jquery.min.js'); document.body.appendChild(scr); scr.onload = function(){ $('div').attr('class', '').attr('id', '').css({ 'margin' : 0, 'padding' : 0, 'width': '100%', 'clear':'both' }); };
3.影象等比例縮放
$(window).bind("load", function() { // IMAGE RESIZE $('#product_cat_list img').each(function() { var maxWidth = 120; var maxHeight = 120; var ratio = 0; var width = $(this).width(); var height = $(this).height(); if(width > maxWidth){ ratio = maxWidth / width; $(this).css("width", maxWidth); $(this).css("height", height * ratio); height = height * ratio; } var width = $(this).width(); var height = $(this).height(); if(height > maxHeight){ ratio = maxHeight / height; $(this).css("height", maxHeight); $(this).css("width", width * ratio); width = width * ratio; } }); //$("#contentpage img").show(); // IMAGE RESIZE });
from:http://snipplr.com/view/62552/mage-resize/
4.返回頁面頂部
// Back To Top
$(document).ready(function(){
$('.top').click(function() {
$(document).scrollTo(0,500);
});
});
//Create a link defined with the class .top
<a href="#" class="top">Back To Top</a>
from:http://demos.flesler.com/jquery/scrollTo/
5.使用jQuery打造手風琴式的摺疊效果
var accordion = {
init: function(){
var $container = $('#accordion');
$container.find('li:not(:first) .details').hide();
$container.find('li:first').addClass('active');
$container.on('click','li a',function(e){
e.preventDefault();
var $this = $(this).parents('li');
if($this.hasClass('active')){
if($('.details').is(':visible')) {
$this.find('.details').slideUp();
} else {
$this.find('.details').slideDown();
}
} else {
$container.find('li.active .details').slideUp();
$container.find('li').removeClass('active');
$this.addClass('active');
$this.find('.details').slideDown();
}
});
}
};
6.通過預載入圖片廊中的上一幅下一幅圖片來模仿Facebook的圖片展示方式
var nextimage = "/images/some-image.jpg";
$(document).ready(function(){
window.setTimeout(function(){
var img = $("").attr("src", nextimage).load(function(){
//all done
});
}, 100);
});
from:http://snipplr.com/view/51943/emulate-facebook-by-preloading-previous--next-photo-gallery-images/
7.使用jQuery和Ajax自動填充選擇框
$(function(){
$("select#ctlJob").change(function(){
$.getJSON("/select.php",{id: $(this).val(), ajax: 'true'}, function(j){
var options = '';
for (var i = 0; i < j.length; i++) {
options += '
' + j[i].optionDisplay + '
';
}
$("select#ctlPerson").html(options);
})
})
})
from:http://remysharp.com/2007/01/20/auto-populating-select-boxes-using-jquery-ajax/
8.自動替換丟失的圖片
// Safe Snippet
$("img").error(function () {
$(this).unbind("error").attr("src", "missing_image.gif");
});
// Persistent Snipper
$("img").error(function () {
$(this).attr("src", "missing_image.gif");
});
from:http://fatfolderdesign.com/525/auto-replace-broken-images
9.在滑鼠懸停時顯示淡入/淡出特效
$(document).ready(function(){
$(".thumbs img").fadeTo("slow", 0.6);
// This sets the opacity of the thumbs to fade down to 60% when the page loads
$(".thumbs img").hover(function(){
$(this).fadeTo("slow", 1.0);
// This should set the opacity to 100% on hover
},function(){
$(this).fadeTo("slow", 0.6);
// This should set the opacity back to 60% on mouseout
});
});
from:http://snipplr.com/view/18606/
10.清空表單資料
function clearForm(form) {
// iterate over all of the inputs for the form
// element that was passed in
$(':input', form).each(function() {
var type = this.type;
var tag = this.tagName.toLowerCase();
// normalize case
// it's ok to reset the value attr of text inputs,
// password inputs, and textareas
if (type == 'text' || type == 'password' || tag == 'textarea')
this.value = "";
// checkboxes and radios need to have their checked state cleared
// but should *not* have their 'value' changed
else if (type == 'checkbox' || type == 'radio')
this.checked = false;
// select elements need to have their 'selectedIndex' property set to -1
// (this works for both single and multiple select elements)
else if (tag == 'select')
this.selectedIndex = -1;
});
};
from:http://www.jquery4u.com/forms/jquery-function-clear-form-data/#.UI02J2knDF8
11.預防對錶單進行多次提交
$(document).ready(function() {
$('form').submit(function() {
if(typeof jQuery.data(this, "disabledOnSubmit") == 'undefined') {
jQuery.data(this, "disabledOnSubmit", { submited: true });
$('input[type=submit], input[type=button]', this).each(function() {
$(this).attr("disabled", "disabled");
});
return true;
}
else
{
return false;
}
});
});
from:http://damienalexandre.fr/post/2009/08/02/jQuery-eviter-la-soumission-multiple-d-un-formulaire
12.動態新增表單元素
//change event on password1 field to prompt new input
$('#password1').change(function() {
//dynamically create new input and insert after password1
$("#password1").append("");
});
from:http://www.jquery4u.com/forms/jquery-dynamically-add-form-elements/
13.讓整個Div可點選
$(".myBox").click(function(){
window.location=$(this).find("a").attr("href");
return false;
});
from:http://css-tricks.com/snippets/jquery/make-entire-div-clickable/14.平衡高度或Div元素
var maxHeight = 0;
$("div").each(function(){
if ($(this).height() > maxHeight) { maxHeight = $(this).height(); }
});
$("div").height(maxHeight);
from:http://css-tricks.com/snippets/jquery/equalize-heights-of-divs/15.
在視窗滾動時自動載入內容
var loading = false;
$(window).scroll(function(){
if((($(window).scrollTop()+$(window).height())+250)>=$(document).height()){
if(loading == false){
loading = true;
$('#loadingbar').css("display","block");
$.get("load.php?start="+$('#loaded_max').val(), function(loaded){
$('body').append(loaded);
$('#loaded_max').val(parseInt($('#loaded_max').val())+50);
$('#loadingbar').css("display","none");
loading = false;
});
}
}
});
$(document).ready(function() {
$('#loaded_max').val(50);
});