1、jQuery实现的内链接平滑滚动
不需要使用太复杂的插件，只要使用下载这段代码即可实现基于内部链接的平滑滚动
$('a[href^="#"]').bind('click.smoothscroll',function (e) { e.preventDefault(); var anchor = this.hash, $target = $(target); $('html, body').stop().animate({ 'scrollTop': $target.offset().top }, 500, 'swing', function () { window.location.hash = anchor; }); });
2、使用jQuery获取所有节点
var $element = $('#gbtags'); var $nodes = $element.contents(); $nodes.each(function() { if(this.nodeType === 3 && $.trim($(this).text())) { $(this).wrap(''); } });
3、限制选择框选择个数
$("#categories option").click(function(e){ if ($(this).parent().val().length < 2) { $(this).removeAttr("selected"); } });
4、jQuery使用通配符来删除class
var _c = 'your-icon-class' $('.currency').removeClass (function (index, css) { return (css.match (/\bicon-\S+/g) || []).join(' '); }).addClass('icon-'+_c);
5、切换启用和禁用
/* HTML | | <input type="text" value="欢迎访问" /><input type="button" value="禁用按钮" /> | | */ // Plugin (function ($) { $.fn.toggleDisabled = function () { return this.each(function () { var $this = $(this); if ($this.attr('disabled')) $this.removeAttr('disabled'); else $this.attr('disabled', 'disabled'); }); }; })(jQuery); // TEST $(function () { $('input:button').click(function () { $('input:text').toggleDisabled(); }); });
6、平滑滚动返回顶端
<h1>admin10000.com</h1> <a href="#anchor">返回顶端</a> $(document).ready(function () { $("a.topLink").click(function () { $("html, body").animate({ scrollTop: $($(this).attr("href")).offset().top + "px" }, { duration: 500, easing: "swing" }); return false; }); });
7、使用jQuery和Google Analytics来跟踪表单
var array1 = []; $(document).ready(function () { $('input').change(function () { var formbox = $(this).attr('id'); array1.push(formbox); console.log("you filled out box " + array1); }); $('#submit').click(function () { console.log('tracked ' + array1); //alert('this is the order of boxes you filled out: ' + array1); _gaq.push(['_trackEvent', 'Form', 'completed', '"' + array1 + '"']); }); });
8、超简单的密码强度提示
$('#pass').keyup(function (e) { var strongRegex = new RegExp("^(?=.{8,})(?=.*[A-Z])(?=.*[a-z])(?=.*[0-9])(?=.*\W).*$", "g"); var mediumRegex = new RegExp("^(?=.{7,})(((?=.*[A-Z])(?=.*[a-z]))|((?=.*[A-Z])(?=.*[0-9]))|((?=.*[a-z])(?=.*[0-9]))).*$", "g"); var enoughRegex = new RegExp("(?=.{6,}).*", "g"); if (false == enoughRegex.test($(this).val())) { $('#passstrength').html('More Characters'); } else if (strongRegex.test($(this).val())) { $('#passstrength').className = 'ok'; $('#passstrength').html('Strong!'); } else if (mediumRegex.test($(this).val())) { $('#passstrength').className = 'alert'; $('#passstrength').html('Medium!'); } else { $('#passstrength').className = 'error'; $('#passstrength').html('Weak!'); } return true; });
9、jQuery生成一个自动停靠页尾效果
// Window load event used just in case window height is dependant upon images $(window).bind("load", function () { var footerHeight = 0, footerTop = 0, $footer = $("#footer"); positionFooter(); function positionFooter() { footerHeight = $footer.height(); footerTop = ($(window).scrollTop() + $(window).height() - footerHeight) + "px"; /* DEBUGGING console.log("Document height: ", $(document.body).height()); console.log("Window height: ", $(window).height()); console.log("Window scroll: ", $(window).scrollTop()); console.log("Footer height: ", footerHeight); console.log("Footer top: ", footerTop); */ if (($(document.body).height() + footerHeight) < $(window).height()) { $footer.css({ position: "absolute" }).stop().animate({ top: footerTop }); } else { $footer.css({ position: "static" }); } } $(window) .scroll(positionFooter) .resize(positionFooter); });
10、预防对表单进行多次提交
$(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; } }); });
11、图像等比例缩放