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support.js
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support.js
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;(function( myjs ){
var div = document.createElement('div'),
button,a;
div.innerHTML = ' <link /><table></table><a href="/a">a</a><input type="checkbox" /><button value="testValue">click</button>';
button = div.getElementsByTagName( 'button' )[0];
a = div.getElementsByTagName( 'a' )[0];
input = div.getElementsByTagName( 'input' )[0];
a.style.cssText = 'top:1px;';
var support = {
// IE678的childNodes不包含空白文本节点,firstChild同理
leadingWhitespace: (div.firstChild.nodeType === 3),
//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,
//IE678无法通过div.innerHTML = '<link />';来插入link,同样的还有style,script节点
htmlSerialize: !!div.getElementsByTagName('link').length,
buttonValue: button.getAttribute('value') === 'testValue',
hrefNormalized: ( a.getAttribute("href") === "/a" ),
style: /top/.test( a.getAttribute('style') ),
cloneEvent: false,
cloneHTML5: document.createElement( 'nav' ).cloneNode( true ).outerHTML !== '<:nav></:nav>'
};
input.checked = true;
support.cloneChecked = input.cloneNode( true ).checked;
if( !div.addEventListener && div.attachEvent && div.fireEvent ){
var testCloneEvent = function(){
support.cloneEvent = true;
div.detachEvent( 'onclick', testCloneEvent );
}
div.attachEvent( 'onclick', testCloneEvent );
div.cloneNode( true ).fireEvent( 'onclick' );
}
myjs.extend({
support: support
})
})( myjs );