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21. 验证元素是否为空
will allow you to check if an element is empty.
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$(document).ready(function() {
if ($('#id').html()) {
// do something
}
});
22. 替换元素
Want to replace a div, or something else?
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$(document).ready(function() {
$('#id').replaceWith('
<DIV>I have been replaced</DIV>
');
});
23. jQuery延时加载功能
Want to delay something?
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$(document).ready(function() {
window.setTimeout(function() {
// do something
}, 1000);
});
24. 移除单词功能
Want to remove a certain word(s)?
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$(document).ready(function() {
var el = $('#id');
el.html(el.html().replace(/word/ig, ""));
});
25. 验证元素是否存在于jquery对象集合中
Simply test with the .length property if the element exists.
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$(document).ready(function() {
if ($('#id').length) {
// do something
}
});
26. 使整个DIV可点击
Want to make the complete div clickable?
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$(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="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
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$(document).ready(function() {
function checkWindowSize() {
if ( $(window).width() > 1200 ) {
$('body').addClass('large');
} else {
$('body').removeClass('large');
}
}
$(window).resize(checkWindowSize);
});
28. 克隆对象
Clone a div or an other element.
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$(document).ready(function() {
var cloned = $('#id').clone();// how to use<DIV id=id></DIV>});
29. 使元素居屏幕中间位置
Center an element in the center of your screen.
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$(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
Write your own selectors.
[url=]复制代码[/url]