トランジションが期待どおりに動作しない理由を理解するのに苦労しています。「from」を適用し、次に「transition」を「el」に追加し、次に「to」を実行し、最後にonTransitionEndを「callback」を実行することになっています(これに、クリアするコードが少し追加されています)遷移プロパティ)。
Webkitブラウザーでは、slideDownは正しく遷移しますが、slideUpは瞬時に遷移します。Firefoxでは逆になります。
エルグ?
JSFiddle: http: //jsfiddle.net/enhTd/
var $ = function(query) {
var a = [],
n = document.querySelectorAll(query),
l = n.length;
for( var i = 0; i<l; i++){
a.push(n[i]);
}
if(l>1) {return a;} else {return a[0];}
},
$id = function(query) { return document.getElementById(query);},
getSupportedPropertyName = function(properties) {
for (var i = 0; i < properties.length; i++) {
if (typeof document.body.style[properties[i]] != "undefined") {
return properties[i];
}
}
return null;
},
vendorTransitions = ["transition", "msTransition", "webkitTransition", "MozTransition", "OTransition"],
prefixedTransitionProperty = getSupportedPropertyName(vendorTransitions),
transition = function(opts){
opts.from && opts.from();
if(prefixedTransitionProperty){
var c = opts.callback || function() {},
el = opts.el,
cb = function(event){
var ev = event, callback = c;
ev.target.removeEventListener(prefixedTransitionProperty+"End", cb);
ev.target.style[prefixedTransitionProperty] = "none";
if(callback) {
callback(ev);
}
};
el.style[prefixedTransitionProperty] = opts.transition || "";
el.addEventListener(prefixedTransitionProperty+"End", cb);
}
opts.to && opts.to();
},
slideDown = function(el, t){
var style = el.style,
h, oh = el.offsetHeight,
t = t || 1000;
//Grab real height
style.height = "";
h = el.offsetHeight;
transition({
"el": el,
transition: "height "+t+"ms ease",
from: function() {
style.height = oh+"px";
},
to: function(){
style.overflow = "hidden";
style.height = h+"px";
},
callback: function(event){
event.target.style.height = "";
}
});
},
slideUp = function(el, t){
var style = el.style,
h = el.offsetHeight,
t = t || 1000;
transition({
"el": el,
transition: "height "+t+"ms ease",
from: function() {
style.height = h+"px";
},
to: function(){
style.overflow = "hidden";
style.height = "0";
}
});
},
slideToggle = function(el, t){
var t = t || 1000;
if(el.style.height=="0px"){
slideDown(el, t);
} else {
slideUp(el, t);
}
};
slideUp($id("intro"));
$("a[href='#intro']").forEach(function(el){
el.addEventListener("click", function(ev) {
ev.preventDefault();
if(ev.target.classList.contains("hide")){
slideUp($(ev.target.hash));
} else {
slideDown($(ev.target.hash));
}
});
});
$("li h3").forEach(function(el){
el.addEventListener("click", function(ev) {
ev.preventDefault();
slideToggle(ev.target.parentNode);
});
});