/*
Copyright (c) 2008 Juriy Zaytsev (kangax@gmail.com)
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
(function(__global){
var t = new Date();
// make sure `window` resolves to a global object
var window = this;
var features = { };
var bugs = { };
features.IS_CSS_TRANSFORMATION_SUPPORTED = (features.__IS_CSS_TRANSFORMATION_SUPPORTED = function(){
var docEl = document.documentElement, s;
if (docEl && (s = docEl.style)) {
return (typeof s.WebkitTransform == 'string'
|| typeof s.MozTransform == 'string');
}
return null;
})();
features.IS_ELEMENT_TAGNAME_UPPERCASED = (features.__IS_ELEMENT_TAGNAME_UPPERCASED = function(){
var docEl = document.documentElement;
if (docEl) {
return 'HTML' === docEl.nodeName;
}
return null;
})();
bugs.QUERY_SELECTOR_IGNORES_CAPITALIZED_VALUES = (bugs.__QUERY_SELECTOR_IGNORES_CAPITALIZED_VALUES = function(){
if (document.createElement && (document.compatMode === 'BackCompat')) {
var el = document.createElement('div'),
el2 = document.createElement('span');
if (el && el2 && el.appendChild && el.querySelector) {
el2.className = 'Test';
el.appendChild(el2);
var isBuggy = (el.querySelector('.Test') !== null);
el = el2 = null;
return isBuggy;
}
}
return null;
})();
features.ARRAY_PROTOTYPE_SLICE_CAN_CONVERT_NODELIST_TO_ARRAY = (features.__ARRAY_PROTOTYPE_SLICE_CAN_CONVERT_NODELIST_TO_ARRAY = function(){
try {
return (Array.prototype.slice.call(document.forms, 0) instanceof Array);
}
catch(e) {
return false;
}
})();
features.WINDOW_EVAL_EVALUATES_IN_GLOBAL_SCOPE = (features.__WINDOW_EVAL_EVALUATES_IN_GLOBAL_SCOPE = function(){
var fnId = '__eval' + Number(new Date()),
passed = false;
try {
// catch indirect eval call errors (i.e. in such clients as Blackberry 9530)
window.eval('var ' + fnId + '=true');
} catch(e) { }
passed = (window[fnId] === true);
if (passed) {
try {
delete window[fnId];
}
catch(e) {
window[fnId] = void 0;
}
}
return passed;
})();
( features.__IS_EVENT_METAKEY_PRESENT =
features.__IS_EVENT_PREVENTDEFAULT_PRESENT =
features.__IS_EVENT_SRCELEMENT_PRESENT =
features.__IS_EVENT_RELATEDTARGET_PRESENT = function(){
features.IS_EVENT_METAKEY_PRESENT = null;
features.IS_EVENT_PREVENTDEFAULT_PRESENT = null;
features.IS_EVENT_SRCELEMENT_PRESENT = null;
features.IS_EVENT_RELATEDTARGET_PRESENT = null;
if (document.createElement) {
var i = document.createElement('input'),
root = document.documentElement;
if (i && i.style && i.click && root && root.appendChild && root.removeChild) {
i.type = 'checkbox';
i.style.display = 'none';
i.onclick = function(e) {
e = e || window.event;
features.IS_EVENT_METAKEY_PRESENT = ('metaKey' in e);
features.IS_EVENT_PREVENTDEFAULT_PRESENT = ('preventDefault' in e);
features.IS_EVENT_SRCELEMENT_PRESENT = ('srcElement' in e);
features.IS_EVENT_RELATEDTARGET_PRESENT = ('relatedTarget' in e);
};
root.appendChild(i);
i.click();
root.removeChild(i);
i.onclick = null;
i = null;
}
}
})();
features.IS_NATIVE_HAS_ATTRIBUTE_PRESENT = (features.__IS_NATIVE_HAS_ATTRIBUTE_PRESENT = function(){
if (document.createElement) {
var i = document.createElement('iframe'),
root = document.documentElement,
frames = window.frames;
if (root && root.appendChild && root.removeChild) {
i.style.display = 'none';
root.appendChild(i);
// some clients (e.g. Blackberry 9000 (Bold)) throw error when accesing frame's document
try {
var frame = frames[frames.length-1];
if (frame) {
var doc = frame.document;
if (doc && doc.write) {
doc.write('<html><head><title></title></head><body></body></html>');
var isPresent = doc.documentElement ? ('hasAttribute' in doc.documentElement) : null;
root.removeChild(i);
i = null;
return isPresent;
}
}
} catch(e) {
return null;
}
}
}
return null;
})();
features.IS_POSITION_FIXED_SUPPORTED = (features.__IS_POSITION_FIXED_SUPPORTED = function(){
var isSupported = null;
if (document.createElement) {
var el = document.createElement('div');
if (el && el.style) {
el.style.width = '1px';
el.style.height = '1px';
el.style.position = 'fixed';
el.style.top = '10px';
var root = document.body;
if (root &&
root.appendChild &&
root.removeChild) {
root.appendChild(el);
isSupported = (el.offsetTop === 10);
root.removeChild(el);
}
el = null;
}
}
return isSupported;
})();
// Thanks to David Mark for suggestion
features.IS_CONTEXTMENU_EVENT_SUPPORTED = (features.__IS_CONTEXTMENU_EVENT_SUPPORTED = function(){
var isPresent = null;
if (document.createElement) {
var el = document.createElement('p');
if (el && el.setAttribute) {
el.setAttribute('oncontextmenu', '');
isPresent = (typeof el.oncontextmenu != 'undefined');
}
el = null;
}
return isPresent;
})();
// Opera 9.x (possibly other versions as well) returns actual values (instead of "auto")
// for statically positioned elements
features.COMPUTED_STYLE_RETURNS_VALUES_FOR_STATICLY_POSITIONED_ELEMENTS = (
features.__COMPUTED_STYLE_RETURNS_VALUES_FOR_STATICLY_POSITIONED_ELEMENTS = function(){
var view = document.defaultView;
if (view && view.getComputedStyle) {
var docEl = document.documentElement;
var position = null;
var style = view.getComputedStyle(docEl, null);
// if element is not statically positioned, make it as such, then restore
if (style.position !== 'static') {
position = style.position;
docEl.style.position = '';
}
var result = (view.getComputedStyle(docEl, null).left !== 'auto');
if (position !== null) {
docEl.style.position = position;
}
return result;
}
return null;
})();
features.IS_RGBA_SUPPORTED = (features.__IS_RGBA_SUPPORTED = function(){
var result = null;
if (document.createElement) {
var value = 'rgba(1,1,1,0.5)',
el = document.createElement('p'),
re = /^rgba/;
if (el && el.style && typeof re.test == 'function') {
try {
el.style.color = value;
result = re.test(el.style.color);
}
catch(e) {
result = false;
}
}
el = null;
}
return result;
})();
features.IS_CSS_BORDER_RADIUS_SUPPORTED = (features.__IS_CSS_BORDER_RADIUS_SUPPORTED = function(){
var docEl = document.documentElement, s;
if (docEl && (s = docEl.style)) {
return (typeof s.borderRadius == 'string'
|| typeof s.MozBorderRadius == 'string'
|| typeof s.WebkitBorderRadius == 'string'
|| typeof s.KhtmlBorderRadius == 'string');
}
return null;
})();
features.IS_CANVAS_SUPPORTED = (features.__IS_CANVAS_SUPPORTED = function(){
if (document.createElement) {
var elCanvas = document.createElement('canvas');
return !!(elCanvas && elCanvas.getContext && elCanvas.getContext('2d'));
}
return null;
})();
features.ELEMENT_CHILDREN_RETURNS_ELEMENT_NODES = (features.__ELEMENT_CHILDREN_RETURNS_ELEMENT_NODES = function(){
var isSupported = null,
docEl = document.documentElement;
if (document.createElement && typeof docEl.children != 'undefined') {
var el = document.createElement('div');
el.innerHTML = '<div><p>a<\/p><\/div>b';
// Safari 2.x returns ALL elements in `children`
// We check that first element is a DIV and that it's the only one element returned
isSupported = (el.children &&
el.children.length === 1 &&
el.children[0] &&
el.children[0].tagName &&
el.children[0].tagName.toUpperCase() === 'DIV');
el = docEl = null;
}
return isSupported;
})();
features.IS_CSS_ON = (features.__IS_CSS_ON = function(){
var body = document.body,
isSupported = null;
if (document.createElement &&
body &&
body.appendChild &&
body.removeChild) {
var el = document.createElement('div');
if (el && el.style) {
el.style.display = 'none';
body.appendChild(el);
isSupported = (el.offsetWidth === 0);
body.removeChild(el);
}
}
return isSupported;
})();
features.IS_DOMFOCUSIN_SUPPORTED = (features.__IS_DOMFOCUSIN_SUPPORTED = function(){
var body = document.body,
isSupported = null;
if (document.createElement &&
body &&
body.appendChild &&
body.removeChild) {
var el = document.createElement('DIV');
if (el && el.addEventListener && el.focus) {
isSupported = false;
el.addEventListener('DOMFocusIn', function(){ isSupported = true; }, false);
el.tabIndex = -1;
body.appendChild(el);
el.focus();
body.removeChild(el);
}
}
return isSupported;
})();
features.IS_QUIRKS_MODE = (features.__IS_QUIRKS_MODE = function(){
if (document.createElement) {
var el = document.createElement('div');
if (el && el.style) {
el.style.width = '1';
}
return el.style.width === '1px';
}
})();
features.IS_CONTAINS_BUGGY = (features.__IS_CONTAINS_BUGGY = function(){
if (document.createElement) {
var el1 = document.createElement('div'),
el2 = document.createElement('div');
if (el1 && el2 && el1.contains) {
return el1.contains(el2);
}
}
return null;
})();
// as per M. Miller advice
features.IS_STRICT_MODE_SUPPORTED = (features.__IS_STRICT_MODE_SUPPORTED = function(){
"use strict";
return !this;
})();
// BUGGIES
// Safari returns "function" as typeof HTMLCollection
// test for typeof DOM1 `document.forms` (if exists)
bugs.TYPEOF_NODELIST_IS_FUNCTION = (bugs.__TYPEOF_NODELIST_IS_FUNCTION = function(){
if (document.forms) {
return (typeof document.forms == 'function');
}
return null;
})();
// IE returns comment nodes as part of `getElementsByTagName` results
bugs.GETELEMENTSBYTAGNAME_RETURNS_COMMENT_NODES = (bugs.__GETELEMENTSBYTAGNAME_RETURNS_COMMENT_NODES = function(){
if (document.createElement) {
var el = document.createElement('div');
if (el && el.getElementsByTagName) {
el.innerHTML = '<span>a</span><!--b-->';
var all = el.getElementsByTagName('*');
// IE5.5 returns a 0-length collection when calling getElementsByTagName with wildcard
if (all.length) {
var lastNode = el.getElementsByTagName('*')[1];
var buggy = !!(lastNode && lastNode.nodeType === 8);
el = lastNode = null;
return buggy;
}
}
}
return null;
})();
// name attribute can not be set at run time in IE
// http://msdn.microsoft.com/en-us/library/ms536389.aspx
bugs.SETATTRIBUTE_IGNORES_NAME_ATTRIBUTE = (bugs.__SETATTRIBUTE_IGNORES_NAME_ATTRIBUTE = function(){
if (document.createElement) {
var elForm = document.createElement('form');
var elInput = document.createElement('input');
var root = document.documentElement;
if (elForm &&
elInput &&
elInput.setAttribute &&
elForm.appendChild &&
root &&
root.appendChild &&
root.removeChild) {
elInput.setAttribute('name', 'test');
elForm.appendChild(elInput);
// Older Safari (e.g. 2.0.2) populates "elements" collection only when form is within a document
root.appendChild(elForm);
var isBuggy = elForm.elements ? (typeof elForm.elements['test'] == 'undefined') : null;
root.removeChild(elForm);
elForm = elInput = null;
return isBuggy;
}
}
return null;
})();
bugs.ELEMENT_PROPERTIES_ARE_ATTRIBUTES = (bugs.__ELEMENT_PROPERTIES_ARE_ATTRIBUTES = function(){
if (document.createElement) {
var el = document.createElement('div');
if (el && el.getAttribute) {
el.__foo = 'bar';
var buggy = (el.getAttribute('__foo') === 'bar');
el = null;
return buggy;
}
}
return null;
})();
bugs.STRING_PROTOTYPE_REPLACE_IGNORES_FUNCTIONS = (bugs.__STRING_PROTOTYPE_REPLACE_IGNORES_FUNCTIONS = function(){
var s = 'a';
if (typeof s.replace == 'function') {
return (s.replace(s, function(){ return '' }).length !== 0);
}
return null;
})();
bugs.ARRAY_PROTOTYPE_CONCAT_ARGUMENTS_BUGGY = (bugs.__ARRAY_PROTOTYPE_CONCAT_ARGUMENTS_BUGGY = function(){
return (function(){
if (arguments instanceof Array) {
return [].concat(arguments)[0] !== 1;
}
return null;
})(1,2);
})();
bugs.PROPERTIES_SHADOWING_DONTENUM_ARE_ENUMERABLE = (bugs.__PROPERTIES_SHADOWING_DONTENUM_ARE_ENUMERABLE = function(){
for (var prop in { toString: true }) {
return false;
}
return true;
})();
bugs.IS_REGEXP_WHITESPACE_CHARACTER_CLASS_BUGGY = (bugs.__IS_REGEXP_WHITESPACE_CHARACTER_CLASS_BUGGY = function(){
var str = "\u0009\u000A\u000B\u000C\u000D\u0020\u00A0\u1680\u180E\u2000\u2001\u2002"+
"\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028\u2029";
return !/^\s+$/.test(str);
})();
bugs.IS_STRING_PROTOTYPE_SPLIT_REGEXP_BUGGY = (bugs.__IS_STRING_PROTOTYPE_SPLIT_REGEXP_BUGGY = function(){
var s = 'a_b';
if (typeof s.split == 'function') {
return s.split(/(_)/).length !== 3;
}
return null;
})();
bugs.PRE_ELEMENTS_IGNORE_NEWLINES = (bugs.__PRE_ELEMENTS_IGNORE_NEWLINES = function(){
if (document.createElement && document.createTextNode) {
var el = document.createElement('pre');
var txt = document.createTextNode('xx');
var root = document.documentElement;
if (el &&
el.appendChild &&
txt &&
root &&
root.appendChild &&
root.removeChild) {
el.appendChild(txt);
root.appendChild(el);
var initialHeight = el.offsetHeight;
el.firstChild.nodeValue = 'x\nx';
// check if `offsetHeight` changed after adding '\n' to the value
var isIgnored = (el.offsetHeight === initialHeight);
root.removeChild(el);
el = txt = null;
return isIgnored;
}
}
return null;
})();
bugs.SELECT_ELEMENT_INNERHTML_BUGGY = (bugs.__SELECT_ELEMENT_INNERHTML_BUGGY = function(){
if (document.createElement) {
var el = document.createElement('select'),
isBuggy = true;
if (el) {
el.innerHTML = '<option value="test">test<\/option>';
if (el.options && el.options[0]) {
isBuggy = el.options[0].nodeName.toUpperCase() !== 'OPTION';
}
el = null;
return isBuggy;
}
}
return null;
})();
bugs.TABLE_ELEMENT_INNERHTML_BUGGY = (bugs.__TABLE_ELEMENT_INNERHTML_BUGGY = function(){
if (document.createElement) {
try {
var el = document.createElement('table');
if (el && el.tBodies) {
el.innerHTML = '<tbody><tr><td>test<\/td><\/tr><\/tbody>';
var isBuggy = typeof el.tBodies[0] == 'undefined';
el = null;
return isBuggy;
}
} catch(e) {
return true;
}
}
return null;
})();
bugs.SCRIPT_ELEMENT_REJECTS_TEXTNODE_APPENDING = (bugs.__SCRIPT_ELEMENT_REJECTS_TEXTNODE_APPENDING = function(){
if (document.createElement && document.createTextNode) {
var s = document.createElement('script'),
isBuggy = false;
if (s && s.appendChild) {
try {
s.appendChild(document.createTextNode(''));
isBuggy = !s.firstChild || (s.firstChild && s.firstChild.nodeType !== 3);
} catch(e) {
return true;
}
s = null;
return isBuggy;
}
}
return null;
})();
bugs.DOCUMENT_GETELEMENTBYID_CONFUSES_IDS_WITH_NAMES = (bugs.__DOCUMENT_GETELEMENTBYID_CONFUSES_IDS_WITH_NAMES = function(){
if (document.getElementsByTagName && document.createElement) {
// need to feature test all these DOM methods before calling them
var num = Number(new Date()),
name = '__test_' + num,
head = document.getElementsByTagName('head')[0],
isBuggy = false,
el;
try {
el = document.createElement('<input name="'+ name +'">');
} catch(e) {
el = document.createElement('input');
el.name = name;
}
if (head.appendChild && head.removeChild) {
head.appendChild(el);
var testElement = document.getElementById(name);
isBuggy = !!(testElement && (testElement.nodeName.toUpperCase() === 'INPUT'));
head.removeChild(el);
el = null;
return isBuggy;
}
}
return null;
})();
bugs.DOCUMENT_GETELEMENTBYID_IGNORES_CASE = (bugs.__DOCUMENT_GETELEMENTBYID_IGNORES_CASE = function(){
if (document.createElement && document.getElementsByTagName && document.getElementById) {
var el = document.createElement('script'),
head = document.getElementsByTagName('head')[0];
if (el && head && head.appendChild && head.removeChild) {
el.type = 'text/javascript';
el.id = 'A';
head.appendChild(el);
var buggy = !!document.getElementById('a');
head.removeChild(el);
el = null;
return buggy;
}
}
return null;
})();
bugs.BUGGY_OFFSET_VALUES_FOR_STATIC_ELEMENTS_INSIDE_POSITIONED_ONES = (
bugs.__BUGGY_OFFSET_VALUES_FOR_STATIC_ELEMENTS_INSIDE_POSITIONED_ONES = function(){
var body = document.body,
isBuggy = null;
if (body &&
body.insertBefore &&
document.createElement &&
document.getElementById) {
var id = 'x' + (Math.random() + '').slice(2);
var clearance = "margin:0;padding:0;border:0;visibility:hidden;";
var payload = '<div style="position:absolute;top:10px;' + clearance + '">'+
'<div style="position:relative;top:10px;' + clearance + '">'+
'<div style="height:10px;font-size:1px;' + clearance + '"><\/div>'+
'<div id="'+id+'">x<\/div>'+
'<\/div>'+
'<\/div>';
var wrapper = document.createElement('div');
if (wrapper) {
wrapper.innerHTML = payload;
body.insertBefore(wrapper, body.firstChild);
var el = document.getElementById(id);
if (el && el.style) {
if (el.offsetTop !== 10) {
// buggy, set position to relative and check if it fixes it
el.style.position = 'relative';
if (el.offsetTop === 10) {
isBuggy = true;
}
}
else {
isBuggy = false;
}
}
body.removeChild(wrapper);
}
wrapper = null;
}
return isBuggy;
})();
bugs.IS_XPATH_POSITION_FUNCTION_BUGGY = (
bugs.__IS_XPATH_POSITION_FUNCTION_BUGGY = function(){
var isBuggy = null;
if (document.evaluate && window.XPathResult) {
var el = document.createElement('div');
el.innerHTML = '<p>a</p><p>b</p>'
var xpath = ".//*[local-name()='p' or local-name()='P'][position() = 2]";
var result = document.evaluate(xpath, el, null,
XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
if (result) {
// TODO: investigate further
// alert(result.snapshotItem(0));
}
}
return isBuggy;
})();
bugs.IS_DOCUMENT_GETELEMENTSBYNAME_BUGGY = (
bugs.__IS_DOCUMENT_GETELEMENTSBYNAME_BUGGY = function(){
var isBuggy = null,
docEl = document.documentElement;
if (docEl &&
docEl.appendChild &&
docEl.removeChild &&
document.getElementsByName &&
document.createElement) {
var el = document.createElement('div');
if (el) {
var uid = 'x' + (Math.random() + '').slice(2);
el.id = uid;
docEl.appendChild(el);
isBuggy = document.getElementsByName(uid)[0] === el;
docEl.removeChild(el);
el = null;
}
}
return isBuggy;
})();
bugs.NAMED_FUNCTION_EXPRESSION_IDENTIFIER_LEAKS_ONTO_ENCLOSING_SCOPE = (
bugs.__NAMED_FUNCTION_EXPRESSION_IDENTIFIER_LEAKS_ONTO_ENCLOSING_SCOPE = function(){
// make sure `g` is not found higher up the scope chain, by declaring it here
var g = null;
return (function(){
var f = function g(){};
// `g` should be resolved to `null` (the one we declared outside this function)
// but since named function expression identifier leaks onto the enclosing scope in IE,
// it will be resolved to a function
return (typeof g == 'function');
})();
})();
bugs.ARGUMENTS_INSTANCEOF_ARRAY = (bugs.__ARGUMENTS_INSTANCEOF_ARRAY = function(){
return arguments instanceof Array;
})();
bugs.IS_OVERFLOW_STYLE_BUGGY = (bugs.__IS_OVERFLOW_STYLE_BUGGY = function(){
var isBuggy = null;
if (document.createElement) {
var el = document.createElement('div');
el.innerHTML = '<p style="overflow: visible;">x</p>';
var firstChild = el.firstChild;
if (firstChild && firstChild.style) {
firstChild.style.overflow = 'hidden';
isBuggy = firstChild.style.overflow !== 'hidden';
}
el = firstChild = null;
}
return isBuggy;
})();
__global.__totalTime = (new Date() - t);
__global.__features = features;
__global.__bugs = bugs;
})(this);
