学习jQueryWord格式文档下载.docx
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学习jQueryWord格式文档下载.docx
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jQuery.support=(function(){
varsupport,
all,
a,
select,
opt,
input,
fragment,
eventName,
i,
isSupported,
clickFn,
div=document.createElement("
div"
);
//Setup
div.setAttribute("
className"
"
t"
);
div.innerHTML="
<
link/>
table>
/table>
ahref='
/a'
>
a<
/a>
inputtype='
checkbox'
//Supporttestswon'
truninsomelimitedornon-browserenvironments
all=div.getElementsByTagName("
*"
a=div.getElementsByTagName("
a"
)[0];
if(!
all||!
a||!
all.length){
return{};
}
//Firstbatchoftests
select=document.createElement("
select"
opt=select.appendChild(document.createElement("
option"
));
input=div.getElementsByTagName("
input"
a.style.cssText="
top:
1px;
float:
left;
opacity:
.5"
support={
//IEstripsleadingwhitespacewhen.innerHTMLisused
//IE678的childNodes不包含空白文本节点,firstChild同理
leadingWhitespace:
(div.firstChild.nodeType===3),
//Makesurethattbodyelementsaren'
tautomaticallyinserted
//IEwillinsertthemintoemptytables
//空table,IE会自动生成tbody,而标准浏览器不会(标准浏览器如果有tr存在,也会自动生成tbody)
tbody:
!
div.getElementsByTagName("
tbody"
).length,
//MakesurethatlinkelementsgetserializedcorrectlybyinnerHTML
//ThisrequiresawrapperelementinIE
//IE678无法通过div.innerHTML='
link/>
来插入link
htmlSerialize:
!
link"
//GetthestyleinformationfromgetAttribute
//(IEuses.cssTextinstead)
//IE67无法用getAttribute获取style,返回object,同理也无法用setAttribute设置style
style:
/top/.test(a.getAttribute("
style"
)),
//MakesurethatURLsaren'
tmanipulated
//(IEnormalizesitbydefault)
//getAttribute获取href的问题,详见
hrefNormalized:
(a.getAttribute("
href"
)==="
/a"
),
//Makesurethatelementopacityexists
//(IEusesfilterinstead)
//UsearegextoworkaroundaWebKitissue.See#5145
//IE678是通过filter滤镜来支持透明度
opacity:
/^0.5/.test(a.style.opacity),
//Verifystylefloatexistence
//(IEusesstyleFloatinsteadofcssFloat)
//IE678通过styleFloat来获取float,而标准浏览器用cssFloat
cssFloat:
a.style.cssFloat,
//Makesurethatifnovalueisspecifiedforacheckbox
//thatitdefaultsto"
on"
.
//(WebKitdefaultsto"
instead)
//checkbox的默认值为'
on'
,chrome
23.0.1271.95m测试
checkOn:
(input.value==="
//Makesurethataselected-by-defaultoptionhasaworkingselectedproperty.
//(WebKitdefaultstofalseinsteadoftrue,IEtoo,ifit'
sinanoptgroup)
//IE中,第一个option不被默认选中,包括IE9依然如此,其他则选中
optSelected:
opt.selected,
//TestsetAttributeoncamelCaseclass.Ifitworks,weneedattrFixeswhendoingget/setAttribute(ie6/7)
//IE67无法通过setAttribute('
class'
'
ooxx'
)来设置className(IE67支持setAttribute('
className'
)),其他浏览器则可以,反之getAttribute同理
getSetAttribute:
div.className!
=="
//Testsforenctypesupportonaform(#6743)
//本机所有浏览器支持一样ie6789,chrome,ff
enctype:
document.createElement("
form"
).enctype,
//Makessurecloninganhtml5elementdoesnotcauseproblems
//WhereouterHTMLisundefined,thisstillworks
//IE6在克隆HTML5的新标签元素时outerHTML有"
html5Clone:
document.createElement("
nav"
).cloneNode(true).outerHTML!
nav>
/:
//jQuery.support.boxModelDEPRECATEDin1.8sincewedon'
tsupportQuirksMode
//检测诡异模式,也就是IE6没有doctype时的模式
boxModel:
(patMode==="
CSS1Compat"
//Willbedefinedlater
submitBubbles:
true,
changeBubbles:
focusinBubbles:
false,
deleteExpando:
noCloneEvent:
inlineBlockNeedsLayout:
shrinkWrapBlocks:
reliableMarginRight:
boxSizingReliable:
pixelPosition:
false
};
//Makesurecheckedstatusisproperlycloned
//IE6789,checked不能被拷贝
input.checked=true;
support.noCloneChecked=input.cloneNode(true).checked;
//Makesurethattheoptionsinsidedisabledselectsaren'
tmarkedasdisabled
//(WebKitmarksthemasdisabled)
//chrome23已修复
select.disabled=true;
support.optDisabled=!
opt.disabled;
//Testtoseeifit'
spossibletodeleteanexpandofromanelement
//FailsinInternetExplorer
//IE678不能delete节点上的属性
try{
deletediv.test;
}catch(e){
support.deleteExpando=false;
//IE会拷贝事件
div.addEventListener&
&
div.attachEvent&
div.fireEvent){
div.attachEvent("
onclick"
clickFn=function(){
//Cloninganodeshouldn'
tcopyoverany
//boundeventhandlers(IEdoesthis)
support.noCloneEvent=false;
});
div.cloneNode(true).fireEvent("
div.detachEvent("
clickFn);
//Checkifaradiomaintainsitsvalue
//afterbeingappendedtotheDOM
//IE下,input被更换类型后,无法保持前一个类型所设的值,蛋疼
input=document.createElement("
input.value="
input.setAttribute("
type"
radio"
support.radioValue=input.value==="
checked"
//#11217-WebKitlosescheckwhenthenameisafterthecheckedattribute
name"
div.appendChild(input);
fragment=document.createDocumentFragment();
fragment.appendChild(div.lastChild);
//WebKitdoesn'
tclonecheckedstatecorrectlyinfragments
//chrome23已修复
support.checkClone=fragment.cloneNode(true).cloneNode(true).lastChild.checked;
//Checkifadisconnectedcheckboxwillretainitschecked
//valueoftrueafterappendedtotheDOM(IE6/7)
support.appendChecked=input.checked;
fragment.removeChild(input);
fragment.appendChild(div);
//TechniquefromJuriyZaytsev
//
//Weonlycareaboutthecasewherenon-standardeventsystems
//areused,namelyinIE.Short-circuitingherehelpsusto
//avoidanevalcall(insetAttribute)whichcancauseCSP
//togohaywire.See:
https:
//developer.mozilla.org/en/Security/CSP
//检测事件类型,如果上面的英文文章看不懂,推荐看这篇:
if(div.attachEvent){
for(iin{
submit:
change:
focusin:
true
}){
eventName="
+i;
isSupported=(eventNameindiv);
if(!
isSupported){
div.setAttribute(eventName,"
return;
isSupported=(typeofdiv[eventName]==="
function"
}
su
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