返回值:jQueryeach(callback)

概述

以每一个匹配的元素作为上下文来执行一个函数。

意味着,每次执行传递进来的函数时,函数中的this关键字都指向一个不同的DOM元素(每次都是一个不同的匹配元素)。而且,在每次执行函数时,都会给函数传递一个表示作为执行环境的元素在匹配的元素集合中所处位置的数字值作为参数(从零开始的整型)。 返回 'false' 将停止循环 (就像在普通的循环中使用 'break')。返回 'true' 跳至下一个循环(就像在普通的循环中使用'continue')。

参数

callbackFunction

对于每个匹配的元素所要执行的函数

示例

描述:

迭代两个图像,并设置它们的 src 属性。注意:此处 this 指代的是 DOM 对象而非 jQuery 对象。

HTML 代码:
<img/><img/>
jQuery 代码:
$("img").each(function(i){
   this.src = "test" + i + ".jpg";
 });
结果:
[ <img src="test0.jpg" />, <img src="test1.jpg" /> ]

描述:

如果你想得到 jQuery对象,可以使用 $(this) 函数。

HTML 代码:
<button>Change colors</button>
<span></span> 
<div></div> 
<div></div>

<div></div> 
<div></div>
<div id="stop">Stop here</div> 
<div></div>

<div></div>
<div></div>
jQuery 代码:
$("img").each(function(){
  $(this).toggleClass("example");
});

描述:

你可以使用 'return' 来提前跳出 each() 循环。

HTML 代码:
<button>Change colors</button>
<span></span> 
<div></div> 
<div></div>

<div></div> 
<div></div>
<div id="stop">Stop here</div> 
<div></div>

<div></div>
<div></div>
jQuery 代码:
$("button").click(function () { 
$("div").each(function (index, domEle) { 
  // domEle == this 
  $(domEle).css("backgroundColor", "yellow");  
  if ($(this).is("#stop")) { 
  $("span").text("Stopped at div index #" + index); 
  return false; 
  } 
});
});

目录 索引

输入要查找的关键字:

#id*.class:animated:button:checkbox:checked:contains:disabled:empty:enabled:eq:even:file:first-child:first:gt:has:header:hidden:hidden:image:input:last-child:last:lt:not:nth-child:odd:only-child:parent:password:radio:reset:selected:submit:text:visible[attrSel1][attrSel2][attrSelN][attribute!=value][attribute$=value][attribute*=value][attribute=value][attribute][attributeadd(expr, [context])addClass(class)addClass(function(index, class))after(content)after(function)ajaxComplete(callback)ajaxError(callback)ajaxSend(callback)ajaxStart(callback)ajaxStop(callback)ajaxSuccess(callback)ancestor descendantandSelf()animate(param,[dur],[e],[fn])animate(params, options)append(content)append(function(index, html))appendTo(content)attr(key, fn)attr(key, value)attr(name)attr(properties)before(content)before(function)bind(type, [data], fn)blur()blur(fn)change()change(fn)children([expr])clearQueue([queueName])click()click(fn)clone()clone(true)closest([expr])contents()contextcss(name)css(name, function(index, value))css(name, value)css(properties)data([name])data(name, value)data(obj)dblclick()dblclick(fn)delay(duration, [queueName])dequeue(name)detach([expr])die([type], [fn])each(callback)elementempty()end()eq(index)error()error(fn)fadeIn(speed, [callback])fadeOut(speed, [callback])fadeTo(speed, opacity, [fn])filter(expr)filter(fn)find(expr)first()focus()focus(fn)focusin( [fn] )focusout( [fn] )get()get(index)has(expr)hasClass(class)height()height(val)hide()hide(speed, [callback])hover(over, out)html()html(function(index, html))html(val)index(subject)innerHeight()innerWidth()insertAfter(content)insertBefore(content)is(expr)jQuery()jQuery(callback)jQuery(elements)jQuery(expr, [context])jQuery(html, [ownerDoc])jQuery(html, props)jQuery.ajax([options])jQuery.ajaxSetup([options])jQuery.boxModeljQuery.browser.versionjQuery.browserjQuery.contains(container, contained)jQuery.data([element], [key])jQuery.data(element, key, val)jQuery.each(object, [callback])jQuery.error(message)jQuery.extend([d],tgt,obj1,[objN])jQuery.extend(object)jQuery.fn.extend(object)jQuery.fx.offjQuery.get(url, [data], [fn], [type])jQuery.getJSON(url, [data], [fn])jQuery.getScript(url, [callback])jQuery.grep(array, fn, [invert])jQuery.inArray(value, array)jQuery.isArray(obj)jQuery.isEmptyObject(obj)jQuery.isFunction(obj)jQuery.isPlainObject(obj)jQuery.makeArray(obj)jQuery.map(array, callback)jQuery.merge(first, second)jQuery.noConflict()jQuery.noConflict(extreme)jQuery.noopjQuery.param(obj, [traditional])jQuery.parseJSON(json)jQuery.post(url, [data], [fn], [type])jQuery.proxy(function, scope)jQuery.supportjQuery.toArray()jQuery.trim(str)jQuery.unique(array)keydown()keydown(fn)keypress()keypress(fn)keyup()keyup(fn)last()lengthlive(type, [data], fn)load(url, [data], [callback])map(callback)mousedown(fn)mousemove(fn)mouseout(fn)mouseover(fn)mouseup(fn)next([expr])nextAll([expr])nextUntil([expr])not(expr)offset(coordinates)offsetParent()offsetone(type, [data], fn)outerHeight(options)outerWidth(options)parent > childparent([expr])parents([expr])parentsUntil([expr])position()prepend(content)prepend(function(index, html))prependTo(content)prev + nextprev ~ siblingsprev([expr])prevAll([expr])prevUntil([expr])queue(name ,callback)queue(name)queue(name, queue)ready(fn)remove([expr])removeAttr(name)removeClass(class | fn])removeClass(class)removeData(name)replaceAll(selector)replaceWith(content)resize(fn)scroll(fn)scrollLeft()scrollLeft(val)scrollTop()scrollTop(val)select()select(fn)selector1,selector2,selectorNselectorserialize()serializeArray()show()show(speed, [callback])siblings([expr])size()slice(start, [end])slideDown(speed, [callback])slideToggle(speed, [callback])slideUp(speed, [callback])stop([clearQueue], [gotoEnd])submit()submit(fn)text()text(function(index, text))text(val)toggle()toggle(fn, fn2, [fn3, fn4, ...])toggle(speed, [callback])toggle(switch)toggleClass(class)toggleClass(class, switch)toggleClass(function(index, class), [switch])trigger(type, [data])triggerHandler(type, [data])unbind([type], [data])unload(fn)unwrap()val()val(array)val(function(index, value))val(val)width()width(val)wrap(elem)wrap(fn)wrap(html)wrapAll(elem)wrapAll(html)wrapInner(elem)wrapInner(fn)wrapInner(html)
#id*.class:animated:button:checkbox:checked:contains:disabled:empty:enabled:eq:even:file:first-child:first:gt:has:header:hidden:hidden:image:input:last-child:last:lt:not:nth-child:odd:only-child:parent:password:radio:reset:selected:submit:text:visible[attrSel1][attrSel2][attrSelN][attribute!=value][attribute$=value][attribute*=value][attribute=value][attribute][attributeadd(expr, [context])addClass(class)addClass(function(index, class))after(content)after(function)ajaxComplete(callback)ajaxError(callback)ajaxSend(callback)ajaxStart(callback)ajaxStop(callback)ajaxSuccess(callback)ancestor descendantandSelf()animate(param,[dur],[e],[fn])animate(params, options)append(content)append(function(index, html))appendTo(content)attr(key, fn)attr(key, value)attr(name)attr(properties)before(content)before(function)bind(type, [data], fn)blur()blur(fn)change()change(fn)children([expr])clearQueue([queueName])click()click(fn)clone()clone(true)closest([expr])contents()contextcss(name)css(name, function(index, value))css(name, value)css(properties)data([name])data(name, value)data(obj)dblclick()dblclick(fn)delay(duration, [queueName])dequeue(name)detach([expr])die([type], [fn])each(callback)elementempty()end()eq(index)error()error(fn)fadeIn(speed, [callback])fadeOut(speed, [callback])fadeTo(speed, opacity, [fn])filter(expr)filter(fn)find(expr)first()focus()focus(fn)focusin( [fn] )focusout( [fn] )get()get(index)has(expr)hasClass(class)height()height(val)hide()hide(speed, [callback])hover(over, out)html()html(function(index, html))html(val)index(subject)innerHeight()innerWidth()insertAfter(content)insertBefore(content)is(expr)jQuery()jQuery(callback)jQuery(elements)jQuery(expr, [context])jQuery(html, [ownerDoc])jQuery(html, props)jQuery.ajax([options])jQuery.ajaxSetup([options])jQuery.boxModeljQuery.browser.versionjQuery.browserjQuery.contains(container, contained)jQuery.data([element], [key])jQuery.data(element, key, val)jQuery.each(object, [callback])jQuery.error(message)jQuery.extend([d],tgt,obj1,[objN])jQuery.extend(object)jQuery.fn.extend(object)jQuery.fx.offjQuery.get(url, [data], [fn], [type])jQuery.getJSON(url, [data], [fn])jQuery.getScript(url, [callback])jQuery.grep(array, fn, [invert])jQuery.inArray(value, array)jQuery.isArray(obj)jQuery.isEmptyObject(obj)jQuery.isFunction(obj)jQuery.isPlainObject(obj)jQuery.makeArray(obj)jQuery.map(array, callback)jQuery.merge(first, second)jQuery.noConflict()jQuery.noConflict(extreme)jQuery.noopjQuery.param(obj, [traditional])jQuery.parseJSON(json)jQuery.post(url, [data], [fn], [type])jQuery.proxy(function, scope)jQuery.supportjQuery.toArray()jQuery.trim(str)jQuery.unique(array)keydown()keydown(fn)keypress()keypress(fn)keyup()keyup(fn)last()lengthlive(type, [data], fn)load(url, [data], [callback])map(callback)mousedown(fn)mousemove(fn)mouseout(fn)mouseover(fn)mouseup(fn)next([expr])nextAll([expr])nextUntil([expr])not(expr)offset(coordinates)offsetParent()offsetone(type, [data], fn)outerHeight(options)outerWidth(options)parent > childparent([expr])parents([expr])parentsUntil([expr])position()prepend(content)prepend(function(index, html))prependTo(content)prev + nextprev ~ siblingsprev([expr])prevAll([expr])prevUntil([expr])queue(name ,callback)queue(name)queue(name, queue)ready(fn)remove([expr])removeAttr(name)removeClass(class | fn])removeClass(class)removeData(name)replaceAll(selector)replaceWith(content)resize(fn)scroll(fn)scrollLeft()scrollLeft(val)scrollTop()scrollTop(val)select()select(fn)selector1,selector2,selectorNselectorserialize()serializeArray()show()show(speed, [callback])siblings([expr])size()slice(start, [end])slideDown(speed, [callback])slideToggle(speed, [callback])slideUp(speed, [callback])stop([clearQueue], [gotoEnd])submit()submit(fn)text()text(function(index, text))text(val)toggle()toggle(fn, fn2, [fn3, fn4, ...])toggle(speed, [callback])toggle(switch)toggleClass(class)toggleClass(class, switch)toggleClass(function(index, class), [switch])trigger(type, [data])triggerHandler(type, [data])unbind([type], [data])unload(fn)unwrap()val()val(array)val(function(index, value))val(val)width()width(val)wrap(elem)wrap(fn)wrap(html)wrapAll(elem)wrapAll(html)wrapInner(elem)wrapInner(fn)wrapInner(html)