不得不分享的JavaScript常用方法函数集（下）

$(document).ready(function() { $('#id').replaceWith(' <DIV>I have been replaced</DIV> '); });

23. jQuery延时加载功能

$(document).ready(function() { window.setTimeout(function() { // do something }, 1000); });

24. 移除单词功能

$(document).ready(function() { var el = $('#id'); el.html(el.html().replace(/word/ig, "")); });

25. 验证元素是否存在于jquery对象集合中

$(document).ready(function() { if ($('#id').length) { // do something } });

26. 使整个DIV可点击

$(document).ready(function() { $("div").click(function(){ //get the url from href attribute and launch the url window.location=$(this).find("a").attr("href"); return false; });// how to use<DIV><A href="https://www.jb51.net/index.html">home</A></DIV>});

27. ID与Class之间转换
当改变Window大小时，在ID与Class之间切换

$(document).ready(function() { function checkWindowSize() { if ( $(window).width() > 1200 ) { $('body').addClass('large'); } else { $('body').removeClass('large'); } } $(window).resize(checkWindowSize); });

28. 克隆对象

$(document).ready(function() { var cloned = $('#id').clone();// how to use<DIV id=id></DIV>});

29. 使元素居屏幕中间位置

$(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(); });

30. 写自己的选择器

$(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'); }); });

31. 统计元素个数

$(document).ready(function() { $("p").size(); });

32. 使用自己的 Bullets

$(document).ready(function() { $("ul").addClass("Replaced"); $("ul > li").prepend("‒ "); // how to use ul.Replaced { list-style : none; } });

33. 引用Google主机上的Jquery类库

//Example 1 <SCRIPT src="https://www.google.com/jsapi"></SCRIPT> <SCRIPT type=text/javascript> google.load("jquery", "1.2.6"); google.setOnLoadCallback(function() { // do something }); </SCRIPT><SCRIPT type=text/javascript src="https://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.min.js"></SCRIPT> // Example 2:(the best and fastest way) <SCRIPT type=text/javascript src="https://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.min.js"></SCRIPT>

34. 禁用Jquery（动画）效果

$(document).ready(function() { jQuery.fx.off = true; });

35. 与其他Javascript类库冲突解决方案

$(document).ready(function() { var $jq = jQuery.noConflict(); $jq('#id').show(); });