JavaScript Custom Vertical Scrollbar
Cara kerja manipulasi scrollbar ini bukan dengan cara menghilangkan scrollbar yang asli dan menggantinya dengan yang baru, melainkan hanya menyembunyikan scrollbar asli tersebut di balik/di belakang scrollbar palsu yang kita ciptakan di atasnya. Jika Anda menghilangkan warna latar pada scrollbar buatan ini, maka elemen scrollbar yang asli akan dengan mudah terlihat:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>JavaScript Custom Vertical Scrollbar</title>
<style>
.scroll-area-wrapper {
width:80%;
margin:50px auto;
}
.scroll-area {
overflow:auto;
padding-right:1em;
position:relative;
}
.scrollbar-track,
.scrollbar-arrow-up,
.scrollbar-arrow-down,
.scrollbar-thumb {position:absolute}
/* scrollbar track */
.scrollbar-track {
background-color:#ccc;
top:0;
right:0;
bottom:0;
}
/* scrollbar thumb */
.scrollbar-thumb {
background-color:#eee;
cursor:pointer;
position:absolute;
right:0;
}
/* up & down arrow */
.scrollbar-arrow-up,
.scrollbar-arrow-down {
background-color:#eee;
cursor:pointer;
right:0;
}
.scrollbar-arrow-up {top:0}
.scrollbar-arrow-down {bottom:0}
.scrollbar-arrow-up:before,
.scrollbar-arrow-down:before {
content:"";
display:block;
position:absolute;
border:4px solid transparent;
left:50%;
margin-left:-4px;
}
.scrollbar-arrow-up:before {
border-bottom-color:#aaa;
top:50%;
margin-top:-6px;
}
.scrollbar-arrow-down:before {
border-top-color:#aaa;
bottom:50%;
margin-bottom:-6px;
}
/* hover state */
.scrollbar-arrow-up:hover,
.scrollbar-arrow-down:hover,
.scrollbar-thumb:hover {background-color:#ddd}
</style>
<script>
var ssb = {
aConts: [],
mouseY: 0,
N: 0,
asd: 0, /* active scrollbar element */
sc: 0,
sp: 0,
to: 0,
// constructor
scrollbar: function (cont_id) {
var cont = document.getElementById(cont_id);
// perform initialization
if (! ssb.init()) return false;
var cont_outer = document.createElement('div');
cont_outer.style.overflow = 'hidden';
cont_outer.style.position = 'relative';
cont.parentNode.appendChild(cont_outer);
cont_outer.appendChild(cont);
cont_outer.style.height = cont.offsetHeight + 'px';
cont.style.position = 'relative';
cont.style.top = '0px';
cont.style.height = '100%';
// adding new container into array
ssb.aConts[ssb.N++] = cont;
cont.sg = false;
//creating scrollbar child elements
cont.st = this.create_div('scrollbar-track', cont, cont_outer);
cont.sb = this.create_div('scrollbar-thumb', cont, cont_outer);
cont.su = this.create_div('scrollbar-arrow-up', cont, cont_outer);
cont.sd = this.create_div('scrollbar-arrow-down', cont, cont_outer);
// on mouse down processing
cont.sb.onmousedown = function (e) {
if (! this.cont.sg) {
if (! e) e = window.event;
ssb.asd = this.cont;
this.cont.yZ = e.screenY;
this.cont.sZ = cont.scrollTop;
this.cont.sg = true;
}
return false;
};
// on mouse down on free track area - move our scroll element too
cont.st.onmousedown = function (e) {
if (! e) e = window.event;
ssb.asd = this.cont;
ssb.mouseY = e.clientY + document.body.scrollTop + document.documentElement.scrollTop;
for (var o = this.cont, y = 0; o !== null; o = o.offsetParent) y += o.offsetTop;
this.cont.scrollTop = (ssb.mouseY - y - (this.cont.ratio * this.cont.offsetHeight / 2) - this.cont.sw) / this.cont.ratio;
this.cont.sb.onmousedown(e);
};
// onmousedown events
cont.su.onmousedown = cont.su.ondblclick = function (e) { ssb.mousedown(this, -1); return false; };
cont.sd.onmousedown = cont.sd.ondblclick = function (e) { ssb.mousedown(this, 1); return false; };
// onmouseout events
cont.su.onmouseout = cont.su.onmouseup = ssb.clear;
cont.sd.onmouseout = cont.sd.onmouseup = ssb.clear;
// onscroll - change positions of scroll element
cont.ssb_onscroll = function () {
this.ratio = (this.offsetHeight - 2 * this.sw) / this.scrollHeight;
this.sb.style.top = Math.floor(this.sw + this.scrollTop * this.ratio) + 'px';
};
// scrollbar width
cont.sw = 18;
// start scrolling
cont.ssb_onscroll();
ssb.refresh();
// binding own onscroll event
cont.onscroll = cont.ssb_onscroll;
return cont;
},
// initialization
init: function () {
if (window.opera || (! window.addEventListener && ! window.attachEvent)) { return false; }
// temp inner function for event registration
function addEvent (o, e, f) {
if (window.addEventListener) { o.addEventListener(e, f, false); ssb.w3c = true; return true; }
if (window.attachEvent) return o.attachEvent('on' + e, f);
return false;
}
// binding events
addEvent(window.document, 'mousemove', ssb.onmousemove);
addEvent(window.document, 'mouseup', ssb.onmouseup);
addEvent(window, 'resize', ssb.refresh);
return true;
},
// create and append div finc
create_div: function(c, cont, cont_outer) {
var o = document.createElement('div');
o.cont = cont;
o.className = c;
cont_outer.appendChild(o);
return o;
},
// do clear of controls
clear: function () {
clearTimeout(ssb.to);
ssb.sc = 0;
return false;
},
// refresh scrollbar
refresh: function () {
for (var i = 0, N = ssb.N; i < N; i++) {
var o = ssb.aConts[i];
o.ssb_onscroll();
o.sb.style.width = o.st.style.width = o.su.style.width = o.su.style.height = o.sd.style.width = o.sd.style.height = o.sw + 'px';
o.sb.style.height = Math.ceil(Math.max(o.sw * 0.5, o.ratio * o.offsetHeight) + 1) + 'px';
}
},
// arrow scrolling
arrow_scroll: function () {
if (ssb.sc !== 0) {
ssb.asd.scrollTop += 6 * ssb.sc / ssb.asd.ratio;
ssb.to = setTimeout(ssb.arrow_scroll, ssb.sp);
ssb.sp = 32;
}
},
/* event binded functions: */
// scroll on mouse down
mousedown: function (o, s) {
if (ssb.sc === 0) {
ssb.asd = o.cont;
ssb.sc = s;
ssb.sp = 400;
ssb.arrow_scroll();
}
},
// on mouseMove binded event
onmousemove: function(e) {
if (! e) e = window.event;
// get vertical mouse position
ssb.mouseY = e.screenY;
if (ssb.asd.sg) ssb.asd.scrollTop = ssb.asd.sZ + (ssb.mouseY - ssb.asd.yZ) / ssb.asd.ratio;
},
// on mouseUp binded event
onmouseup: function (e) {
if (! e) e = window.event;
var tg = (e.target) ? e.target: e.srcElement;
if (ssb.asd && document.releaseCapture) ssb.asd.releaseCapture();
document.onselectstart = '';
ssb.clear();
ssb.asd.sg = false;
}
};
</script>
</head>
<body>
<div class="scroll-area-wrapper">
<div class="scroll-area" id="scroll-area-1" style="height:400px;">
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<p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi. Nam liber tempor cum soluta nobis eleifend option congue nihil imperdiet doming id quod mazim placerat facer possim assum. Typi non habent claritatem insitam; est usus legentis in iis qui facit eorum claritatem. Investigationes demonstraverunt lectores legere me lius quod ii legunt saepius. Claritas est etiam processus dynamicus, qui sequitur mutationem consuetudium lectorum. Mirum est notare quam littera gothica, quam nunc putamus parum claram, anteposuerit litterarum formas humanitatis per seacula quarta decima et quinta decima. Eodem modo typi, qui nunc nobis videntur parum clari, fiant sollemnes in futurum.</p>
<p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi. Nam liber tempor cum soluta nobis eleifend option congue nihil imperdiet doming id quod mazim placerat facer possim assum. Typi non habent claritatem insitam; est usus legentis in iis qui facit eorum claritatem. Investigationes demonstraverunt lectores legere me lius quod ii legunt saepius. Claritas est etiam processus dynamicus, qui sequitur mutationem consuetudium lectorum. Mirum est notare quam littera gothica, quam nunc putamus parum claram, anteposuerit litterarum formas humanitatis per seacula quarta decima et quinta decima. Eodem modo typi, qui nunc nobis videntur parum clari, fiant sollemnes in futurum.</p>
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<p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi. Nam liber tempor cum soluta nobis eleifend option congue nihil imperdiet doming id quod mazim placerat facer possim assum. Typi non habent claritatem insitam; est usus legentis in iis qui facit eorum claritatem. Investigationes demonstraverunt lectores legere me lius quod ii legunt saepius. Claritas est etiam processus dynamicus, qui sequitur mutationem consuetudium lectorum. Mirum est notare quam littera gothica, quam nunc putamus parum claram, anteposuerit litterarum formas humanitatis per seacula quarta decima et quinta decima. Eodem modo typi, qui nunc nobis videntur parum clari, fiant sollemnes in futurum.</p>
</div>
</div>
<script>
ssb.scrollbar('scroll-area-1'); // scrollbar initialization with element ID
</script>
</body>
</html>Referensi: Script Tutorials – Custom Scrollbars (dengan beberapa perubahan dan peniadaan fitur yang tidak terlalu penting).
Labels: JavaScript, Potongan
11 Comments:
kalo buat blogger langsung gmana?
Berarti maksud dari artikel ini menganti atau apa mas...?
kalo ini menganti ,
apakah custom scrollbarnya juga kelihatan sama pada browser lain..??
aku pernah lihat ini, tp lopa dimana :Ozz
noraesae.github.com/perfect-scrollbar :D
Bukan mengganti. Cuma, scrollbar yang asli ditutupi dengan yang palsu di atasnya. Nah, scrollbar palsu tersebut berfungsi untuk menggerakkan scrollbar yang asli di belakangnya… Tampilan dijamin sama pada semua peramban karena semua elemen scrollbar ini cuma dibuat dengan elemen HTML.
Itu memakai JQuery, kalau ini murni JavaScript. Saya lebih suka TinyScrollbar, walaupun implementasinya acak-acakan (tidak praktis), tapi ukurannya lebih kecil. Lebih mudah dimodifikasi :-bd
ohhh ,
jadi intinya scrollbarnya ini lagi menyamar toh ,
hahaha ,
mantab mas taufiq :)
mas taufik saya mau tanya, code javascript untuk efek load saat memuat gambar di blog bagaimana ya? :)
Manteb. Izin coba!
wah harusnya dari tadi kemari :D
wah pake yg ini tampilanya ada yang bentrok... dan gk pas sama templatenya euy kang
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