1.
document.getElementsByTagName('head')[0]
document.head
2.
3.
var IEVersion = NaN
if (window.VBArray) {
IEVersion = document.documentMode || (window.XMLHttpRequest ? 7 : 6)
}
4.
function returnRandom() {
return new Date() - 0
}
5.
for (var i = 0, n = array.length; i < n; i++) { // n
}
6.
var rword = /[^, ]+/g // ^排除
' m, f'.match(rword) // ["m", "f"]
var class2type = {}
"Boolean Number String Function Array Date RegExp Object Error".replace(rword, function (name) {
class2type["[object " + name + "]"] = name.toLowerCase()
})
class2type
7.
avalon.each({
scrollLeft: "pageXOffset",
scrollTop: "pageYOffset"
}, function (method, prop) {
avalon.fn[method] = function (val) {
var node = this[0] || {},
win = getWindow(node),
top = method === "scrollTop"
if (!arguments.length) {
return win ? win[prop] : node[method]
} else {
if (win) { // scrollTo(xpos,ypos)
win.scrollTo(!top ? val : win[prop], top ? val : win[prop])
} else {
node[method] = val
}
}
}
})
8.
var eventHooks = {
"mouseenter": {
type: "mouseover",
fix: function(elem, fn) {
return function (e) {
var t = e.relatedTarget
if (!t || (t !== elem && !(elem.compareDocumentPosition(t) & 16))) {
delete e.type
e.type = "mouseenter"
return fn.call(elem, e)
}
}
}
}
}
function bind(el, type, fn, phase) {
var hooks = eventHooks
var hook = hooks[type]
if (typeof hook === "object") {
type = hook.type || type
phase = hook.phase || !!phase
fn = hook.fix ? hook.fix(el, fn) : fn
}
el.addEventListener(type, fn, phase)
return fn
}
bind(document.querySelector('#box'), 'click', function(e) {
console.log(this)
console.log(e)
})
bind(document.querySelector('#box'), 'mouseenter', function(e) {
console.log(this)
console.log(e)
})
9.
if (DOC.onmousewheel === void 0) {
/* IE6-11 chrome mousewheel wheelDetla 下 -120 上 120
firefox DOMMouseScroll detail 下3 上-3
firefox wheel detlaY 下3 上-3
IE9-11 wheel deltaY 下40 上-40
chrome wheel deltaY 下100 上-100 */
eventHooks.mousewheel = {
type: "wheel",
fix: function (elem, fn) {
return function (e) {
e.wheelDeltaY = e.wheelDelta = e.deltaY > 0 ? -120 : 120
e.wheelDeltaX = 0
Object.defineProperty(e, "type", {
value: "mousewheel"
})
fn.call(elem, e)
}
}
}
}
10.
11.
12.
while (fn = readyList.shift()) {
fn(avalon)
}