/******************************************************************************
Name: Highslide JS
Version: 3.1.0 (March 1 2007)
Author: Torstein H鴑si
Support: http://vikjavev.no/highslide/forum
Email: See http://vikjavev.no/megsjol
Licence:
Highslide JS is licensed under a Creative Commons Attribution-NonCommercial 2.5
License (http://creativecommons.org/licenses/by-nc/2.5/).
You are free:
* to copy, distribute, display, and perform the work
* to make derivative works
Under the following conditions:
* Attribution. You must attribute the work in the manner specified by the
author or licensor.
* Noncommercial. You may not use this work for commercial purposes.
* For any reuse or distribution, you must make clear to others the license
terms of this work.
* Any of these conditions can be waived if you get permission from the
copyright holder.
Your fair use and other rights are in no way affected by the above.
******************************************************************************/
var hs = {
// Apply your own settings here, or override them in the html file.
graphicsDir : 'highslide/graphics/',
restoreCursor : "zoomout.cur", // necessary for preload
fullExpandIcon : 'fullexpand.gif',
expandSteps : 10, // number of steps in zoom. Each step lasts for duration/step milliseconds.
expandDuration : 250, // milliseconds
restoreSteps : 10,
restoreDuration : 250,
allowMultipleInstances: true,
hideThumbOnExpand : true,
captionSlideSpeed : 1, // set to 0 to disable slide in effect
outlineWhileAnimating : 0, // not recommended, animation gets jaggy on slow systems.
outlineStartOffset : 3, // ends at 10
marginLeft : 10,
marginRight : 35, // leave room for scrollbars + outline
marginTop : 10,
marginBottom : 35, // leave room for scrollbars + outline
zIndexCounter : 1001, // adjust to other absolutely positioned elements
fullExpandTitle : '放大到实际尺寸',
restoreTitle : '单击可关闭图片, 本窗口可拖动。使用←→键察看上一图或下一图片。',
focusTitle : '切换到这幅图片',
loadingText : 'loading...',
loadingTitle : '点击关闭',
loadingOpacity : 0.75,
showCredits : false, // you can set this to false if you want
creditsText : 'Powered by Highslide JS',
creditsHref : 'http://vikjavev.no/highslide/?user=1',
creditsTitle : 'Go to the Highslide JS homepage',
// These settings can also be overridden inline for each image
anchor : 'auto', // where the image expands from
align : 'auto', // position in the client (overrides anchor)
captionId : null,
captionTemplateId : null,
slideshowGroup : null, // defines groups for next/previous links and keystrokes
spaceForCaption : 30, // leaves space below images with captions
minWidth: 200,
minHeight: 200,
allowSizeReduction: true, // allow the image to reduce to fit client size. If false, this overrides minWidth and minHeight
outlineType : 'drop-shadow', // set null to disable outlines
wrapperClassName : null, // for enhanced css-control
enableKeyListener : true,
// END OF YOUR SETTINGS
// declare internal properties
preloadTheseImages : new Array(),
continuePreloading: true,
expandedImagesCounter : 0,
expanders : new Array(),
overrides : new Array(
'anchor',
'align',
'outlineType',
'outlineWhileAnimating',
'spaceForCaption',
'wrapperClassName',
'minWidth',
'minHeight',
'captionId',
'captionTemplateId',
'allowSizeReduction',
'slideshowGroup',
'enableKeyListener'
),
overlays : new Array(),
toggleImagesGroup : null,
pendingOutlines : new Array(),
// drag functionality
ie : (document.all && !window.opera),
safari : navigator.userAgent.indexOf("Safari") != -1,
hasFocused : false,
$ : function (id) {
return document.getElementById(id);
},
push : function (arr, val) {
arr[arr.length] = val;
},
createElement : function (tag, attribs, styles, parent) {
var el = document.createElement(tag);
if (attribs) hs.setAttribs(el, attribs);
if (styles) hs.setStyles(el, styles);
if (parent) parent.appendChild(el);
return el;
},
setAttribs : function (el, attribs) {
for (var x in attribs) {
el[x] = attribs[x];
}
},
setStyles : function (el, styles) {
for (var x in styles) {
try { el.style[x] = styles[x]; }
catch (e) {}
}
},
ieVersion : function () {
arr = navigator.appVersion.split("MSIE");
return parseFloat(arr[1]);
},
clientInfo : function () {
var iebody = (document.compatMode && document.compatMode != "BackCompat")
? document.documentElement : document.body;
this.width = hs.ie ? iebody.clientWidth : self.innerWidth;
this.height = hs.ie ? iebody.clientHeight : self.innerHeight;
this.scrollLeft = hs.ie ? iebody.scrollLeft : pageXOffset;
this.scrollTop = hs.ie ? iebody.scrollTop : pageYOffset;
} ,
position : function(el) {
var parent = el;
var p = Array();
p.x = parent.offsetLeft;
p.y = parent.offsetTop;
while (parent.offsetParent) {
parent = parent.offsetParent;
p.x += parent.offsetLeft;
p.y += parent.offsetTop;
}
return p;
},
expand : function(a, params, contentType) {
try {
new HsExpander(a, params, contentType);
return false;
} catch (e) {
return true;
}
},
focusTopmost : function() {
var topZ = 0;
var topmostKey = -1;
for (i = 0; i if (hs.expanders[i]) {
if (hs.expanders[i].wrapper.style.zIndex && hs.expanders[i].wrapper.style.zIndex > topZ) {
topZ = hs.expanders[i].wrapper.style.zIndex;
topmostKey = i;
}
}
}
if (topmostKey == -1) hs.focusKey = -1;
else hs.expanders[topmostKey].focus();
},
closeId : function(elId) { // for text links
for (i = 0; i if (hs.expanders[i] && (hs.expanders[i].thumb.id == elId || hs.expanders[i].a.id == elId)) {
hs.expanders[i].doClose();
return;
}
}
},
close : function(el) {
var key = hs.getWrapperKey(el);
if (hs.expanders[key]) hs.expanders[key].doClose();
return false;
},
toggleImages : function(closeId, expandEl) {
if (closeId) hs.closeId(closeId);
if (hs.ie) expandEl.href = expandEl.href.replace('about:(blank)?', ''); // mysterious IE thing
hs.toggleImagesExpandEl = expandEl;
return false;
},
getAdjacentAnchor : function(key, op) {
var aAr = document.getElementsByTagName('A');
var hsAr = new Array;
var activeI = -1;
var j = 0;
for (i = 0; i if (hs.isHsAnchor(aAr[i]) && ((hs.expanders[key].slideshowGroup == hs.getParam(aAr[i], 'slideshowGroup')))) {
hsAr[j] = aAr[i];
if (hs.expanders[key] && aAr[i] == hs.expanders[key].a) {
activeI = j;
}
j++;
}
}
return hsAr[activeI + op];
},
getParam : function (a, param) {
try {
var s = a.onclick.toString();
var oneLine = s.replace(/\s/g, ' ');
var sParams = oneLine.replace(/.*?hs.(htmlE|e)xpand\s*?\(\s*?this\s*?,\s*?{(.*?)}.*?$/, '$2');
if (hs.safari) { // stupid bug
for (var i = 0; i sParams = sParams.replace(hs.overrides[i] +':', ','+ hs.overrides[i] +':').replace(/^\s*?,/, '');
}
}
if (oneLine == sParams) return null;
eval('var arr = {'+ sParams +'};');
for (var x in arr) {
if (x == param) return arr[x];
}
} catch (e) {
return null;
}
},
getSrc : function (a) {
var src = hs.getParam(a, 'src');
if (src) return src;
return a.rel.replace(/_slash_/g, '/') || a.href;
},
previousOrNext : function (el, op) {
if (typeof el == 'object') var activeKey = hs.getWrapperKey(el);
else if (typeof el == 'number') var activeKey = el;
if (hs.expanders[activeKey]) {
hs.toggleImagesExpandEl = hs.getAdjacentAnchor(activeKey, op);
hs.expanders[activeKey].doClose();
}
return false;
},
previous : function (el) {
return hs.previousOrNext(el, -1);
},
next : function (el) {
return hs.previousOrNext(el, 1);
},
keyHandler : function(e) {
if (!e) e = window.event;
if (!e.target) e.target = e.srcElement; // ie
if (e.target.form) return; // form element has focus
var op = null;
switch (e.keyCode) {
case 34: // Page Down
case 39: // Arrow right
case 40: // Arrow left
op = 1;
break;
case 33: // Page Up
case 37: // Arrow left
case 38: // Arrow down
op = -1;
break;
case 27: // Escape
case 13: // Enter
if (hs.expanders[hs.focusKey]) hs.expanders[hs.focusKey].doClose();
return false;
}
if (op != null) {
hs.removeEventListener(document, 'keydown', hs.keyHandler);
if (hs.expanders[hs.focusKey] && !hs.expanders[hs.focusKey].enableKeyListener) return true;
return hs.previousOrNext(hs.focusKey, op);
}
else return true;
},
registerOverlay : function (overlay) {
hs.push(hs.overlays, overlay);
},
getWrapperKey : function (el) {
var key = -1;
while (el.parentNode) {
el = el.parentNode;
if (el.id && el.id.match(/^highslide-wrapper-[0-9]+$/)) {
key = el.id.replace(/^highslide-wrapper-([0-9]+)$/, "$1");
break;
}
}
return key;
},
cleanUp : function () {
if (hs.toggleImagesExpandEl) {
hs.toggleImagesExpandEl.onclick();
hs.toggleImagesExpandEl = null;
} else {
for (i = 0; i if (hs.expanders[i] && hs.expanders[i].isExpanded) hs.focusTopmost();
}
}
},
mouseClickHandler : function(e)
{
if (!e) e = window.event;
if (e.button > 1) return true;
if (!e.target) e.target = e.srcElement;
var fobj = e.target;
while (fobj.parentNode
&& !(fobj.className && fobj.className.match(/highslide-(image|move|html)/)))
{
fobj = fobj.parentNode;
}
if (!fobj.parentNode) return;
hs.dragKey = hs.getWrapperKey(fobj);
if (fobj.className.match(/highslide-(image|move)/)) {
var isDraggable = true;
var wLeft = parseInt(hs.expanders[hs.dragKey].wrapper.style.left);
var wTop = parseInt(hs.expanders[hs.dragKey].wrapper.style.top);
}
if (e.type == 'mousedown') {
if (isDraggable) // drag or focus
{
hs.dragObj = hs.expanders[hs.dragKey].content;
if (fobj.className.match('highslide-image')) hs.dragObj.style.cursor = 'move';
hs.leftBeforeDrag = wLeft;
hs.topBeforeDrag = wTop;
hs.dragX = e.clientX;
hs.dragY = e.clientY;
hs.addEventListener(document, 'mousemove', hs.mouseMoveHandler);
if (e.preventDefault) e.preventDefault(); // FF
if (hs.dragObj.className.match(/highslide-(image|html)-blur/)) {
hs.expanders[hs.dragKey].focus();
hs.hasFocused = true;
}
return false;
}
else if (fobj.className.match(/highslide-html/)) { // just focus
hs.expanders[hs.dragKey].focus();
hs.expanders[hs.dragKey].redoShowHide();
hs.hasFocused = false; // why??
}
} else if (e.type == 'mouseup') {
hs.removeEventListener(document, 'mousemove', hs.mouseMoveHandler);
if (isDraggable && hs.expanders[hs.dragKey]) {
if (fobj.className.match('highslide-image')) {
fobj.style.cursor = hs.styleRestoreCursor;
}
var hasMoved = wLeft != hs.leftBeforeDrag || wTop != hs.topBeforeDrag;
if (!hasMoved && !hs.hasFocused && !fobj.className.match(/highslide-move/)) {
hs.expanders[hs.dragKey].doClose();
} else if (hasMoved || (!hasMoved && hs.hasHtmlExpanders)) {
hs.expanders[hs.dragKey].redoShowHide();
}
hs.hasFocused = false;
} else if (fobj.className.match('highslide-image-blur')) {
fobj.style.cursor = hs.styleRestoreCursor;
}
}
},
mouseMoveHandler : function(e)
{
if (!hs.expanders[hs.dragKey] || !hs.expanders[hs.dragKey].wrapper) return;
if (!e) e = window.event;
var exp = hs.expanders[hs.dragKey];
var w = exp.wrapper;
w.style.left = hs.leftBeforeDrag + e.clientX - hs.dragX +'px';
w.style.top = hs.topBeforeDrag + e.clientY - hs.dragY +'px';
if (exp.objOutline) {
var o = exp.objOutline;
o.outer.style.left = (parseInt(w.style.left) - o.offset) +'px';
o.outer.style.top = (parseInt(w.style.top) - o.offset) +'px';
}
return false;
},
addEventListener : function (el, event, func) {
if (document.addEventListener) el.addEventListener(event, func, false);
else if (document.attachEvent) el.attachEvent('on'+ event, func);
else el[event] = func;
},
removeEventListener : function (el, event, func) {
if (document.removeEventListener) el.removeEventListener(event, func, false);
else if (document.detachEvent) el.detachEvent('on'+ event, func);
else el[event] = null;
},
isHsAnchor : function (a) {
return (a.className && (a.className.match("highslide$") || a.className.match("highslide ")));
},
preloadFullImage : function (i) {
if (hs.continuePreloading && hs.preloadTheseImages[i] && hs.preloadTheseImages[i] != 'undefined') {
var img = document.createElement('img');
img.onload = function() { hs.preloadFullImage(i + 1); };
img.src = hs.preloadTheseImages[i];
}
},
preloadImages : function (number) {
if (number) this.numberOfImagesToPreload = number;
var j = 0;
var aTags = document.getElementsByTagName('A');
for (i = 0; i a = aTags[i];
if (hs.isHsAnchor(a)) {
if (j hs.preloadTheseImages[j] = hs.getSrc(a);
j++;
}
}
}
// preload outlines
new HsOutline(hs.outlineType, function () { hs.preloadFullImage(0)} );
// preload cursor
var cur = document.createElement('img');
cur.src = hs.graphicsDir + hs.restoreCursor;
},
genContainer : function () {
if (!hs.container) {
hs.container = hs.createElement('div',
null,
{ position: 'absolute', left: 0, top: 0, width: '100%', zIndex: hs.zIndexCounter },
document.body
);
}
}
}; // end hs object
//-----------------------------------------------------------------------------
HsOutline = function (outlineType, onLoad) {
if (!outlineType) return;
if (onLoad) this.onLoad = onLoad;
this.outlineType = outlineType;
this.outline = new Array();
var v = hs.ieVersion();
hs.genContainer();
this.hasAlphaImageLoader = hs.ie && v >= 5.5 && v this.hasPngSupport = !hs.ie || (hs.ie && v >= 8);
this.hasOutline = this.outlineType && (this.hasAlphaImageLoader || this.hasPngSupport);
this.outer = hs.createElement(
'table',
{
cellSpacing: 0 // saf
},
{
visibility: 'hidden',
position: 'absolute',
zIndex: hs.zIndexCounter++,
borderCollapse: 'collapse'
},
hs.container
);
this.tbody = hs.createElement('tbody', null, null, this.outer);
this.preloadOutlineElement(1); // recursive
};
HsOutline.prototype.preloadOutlineElement = function (i) {
if (this.outline[i] && this.outline[i].onload) { // Gecko multiple onloads bug
this.outline[i].onload = null;
return;
}
this.offset = this.hasOutline ? 10 : 0;
if (i == 1 || i == 4 || i == 6) this.tr = hs.createElement('tr', null, null, this.tbody);
if (i == 5) this.inner = hs.createElement('td', null, { padding: 0, margin: 0, border: 0, position: 'relative' }, this.tr);
var files = Array (0,8,1,2,7,3,6,5,4);
var src = hs.graphicsDir + "outlines/"+ this.outlineType +"/"+ files[i] +".png";
if (this.hasAlphaImageLoader) {
var bgKey = 'filter';
var bgValue = "progid:DXImageTransform.Microsoft.AlphaImageLoader("
+ "enabled=true, sizingMethod=scale src='"+ src + "') ";
} else if (this.hasPngSupport || this.hasIe7Bug) {
var bgKey = 'background';
var bgValue = 'url('+ src +')';
}
var styles = { lineHeight: 0, fontSize: 0, padding: 0, margin: 0, border: 0 };
if (this.hasOutline) styles[bgKey] = bgValue;
var td = hs.createElement('td', null, styles);
var img = hs.createElement('img', null, { visibility: 'hidden', display: 'block' }, td); // for onload trigger
var dim = 2 * this.offset;
hs.setStyles (td, { height: dim +'px', width: dim +'px'} );
var pThis = this;
if (i else img.onload = function() {
hs.pendingOutlines[pThis.outlineType] = pThis;
if (pThis.onLoad) pThis.onLoad();
};
this.tr.appendChild(td);
if (this.hasOutline) img.src = src;
else img.onload();
};
HsOutline.prototype.destroy = function() {
this.outer.parentNode.removeChild(this.outer);
};
//-----------------------------------------------------------------------------
// The expander object
HsExpander = function(a, params, contentType) {
hs.continuePreloading = false;
// override inline parameters
for (i = 0; i var name = hs.overrides[i];
if (params && typeof params[name] != 'undefined') this[name] = params[name];
else this[name] = hs[name];
}
if (params && params.thumbnailId) {
var el = hs.$(params.thumbnailId);
} else { // first img within anchor
for (i = 0; i if (a.childNodes[i].tagName && a.childNodes[i].tagName == 'IMG') {
var el = a.childNodes[i];
break;
}
}
}
if (!el) el = a;
// cancel other
for (i = 0; i if (hs.expanders[i] && hs.expanders[i].thumb != el && !hs.expanders[i].onLoadStarted) {
hs.expanders[i].cancelLoading();
}
}
// check if already open
for (i = 0; i if (hs.expanders[i] && hs.expanders[i].thumb == el) {
hs.expanders[i].focus();
return false;
}
else if (hs.expanders[i] && !hs.allowMultipleInstances) {
hs.expanders[i].doClose();
}
}
this.key = hs.expandedImagesCounter++;
hs.expanders[this.key] = this;
if (contentType == 'html') {
this.isHtml = true;
this.contentType = 'html';
} else {
this.isImage = true;
this.contentType = 'image';
}
this.a = a;
this.thumbsUserSetId = el.id || a.id;
this.thumb = el;
this.overlays = new Array();
var pos = hs.position(el);
// instanciate the wrapper
this.wrapper = hs.createElement(
'div',
{
id: 'highslide-wrapper-'+ this.key,
className: this.wrapperClassName
},
{
visibility: 'hidden',
position: 'absolute',
zIndex: hs.zIndexCounter++
}
);
// store properties of thumbnail
this.thumbWidth = el.width ? el.width : el.offsetWidth;
this.thumbHeight = el.height ? el.height : el.offsetHeight;
this.thumbLeft = pos.x;
this.thumbTop = pos.y;
this.thumbClass = el.className;
// thumb borders
this.thumbOffsetBorderW = (this.thumb.offsetWidth - this.thumbWidth) / 2;
this.thumbOffsetBorderH = (this.thumb.offsetHeight - this.thumbHeight) / 2;
// get the wrapper
if (hs.pendingOutlines[this.outlineType]) {
this.connectOutline();
this[this.contentType +'Create']();
} else if (!this.outlineType) {
hs.genContainer();
this[this.contentType +'Create']();
} else {
this.displayLoading();
var pThis = this;
new HsOutline(this.outlineType,
function () {
pThis.connectOutline();
pThis[pThis.contentType +'Create']();
}
);
}
};
HsExpander.prototype.connectOutline = function(x, y) {
var w = hs.pendingOutlines[this.outlineType];
this.objOutline = w;
hs.pendingOutlines[this.outlineType] = null;
};
HsExpander.prototype.displayLoading = function() {
if (this.onLoadStarted || this.loading) return;
this.originalCursor = this.a.style.cursor;
this.a.style.cursor = 'wait';
if (!hs.loading) {
hs.loading = hs.createElement('a',
{
className: 'highslide-loading',
title: hs.loadingTitle,
innerHTML: hs.loadingText
},
{
position: 'absolute'
}, hs.container
);
if (hs.ie) hs.loading.style.filter = 'alpha(opacity='+ (100*hs.loadingOpacity) +')';
else hs.loading.style.opacity = hs.loadingOpacity;
}
this.loading = hs.loading;
this.loading.href = 'javascript:hs.expanders['+ this.key +'].cancelLoading()';
this.loading.visibility = 'visible';
this.loading.style.left = (this.thumbLeft + this.thumbOffsetBorderW
+ (this.thumbWidth - this.loading.offsetWidth) / 2) +'px';
this.loading.style.top = (this.thumbTop
+ (this.thumbHeight - this.loading.offsetHeight) / 2) +'px';
setTimeout(
"if (hs.expanders["+ this.key +"] && hs.expanders["+ this.key +"].loading) "
+ "hs.expanders["+ this.key +"].loading.style.visibility = 'visible';",
100
);
};
HsExpander.prototype.imageCreate = function() {
var img = document.createElement('img');
var key = this.key;
var img = document.createElement('img');
this.content = img;
img.onload = function () { if (hs.expanders[key]) hs.expanders[key].onLoad(); };
img.className = 'highslide-image '+ this.thumbClass;
img.style.visibility = 'hidden'; // prevent flickering in IE
img.style.display = 'block';
img.style.position = 'absolute';
img.style.zIndex = 3;
img.title = hs.restoreTitle;
img.onmouseover = function () {
if (hs.expanders[key]) hs.expanders[key].onMouseOver();
};
img.onmouseout = function (e) {
var rel = e ? e.relatedTarget : event.toElement;
if (hs.expanders[key]) hs.expanders[key].onMouseOut(rel);
};
if (hs.safari) hs.container.appendChild(img);
img.src = hs.getSrc(this.a);
this.displayLoading();
};
HsExpander.prototype.onLoad = function() {
try {
if (!this.content) return;
if (this.onLoadStarted) return; // old Gecko loop
else this.onLoadStarted = true;
if (this.loading) {
this.loading.style.visibility = 'hidden';
this.loading = null;
this.a.style.cursor = this.originalCursor || '';
}
if (this.isImage) {
this.newWidth = this.content.width;
this.newHeight = this.content.height;
this.fullExpandWidth = this.newWidth;
this.fullExpandHeight = this.newHeight;
this.content.width = this.thumbWidth;
this.content.height = this.thumbHeight;
}
// identify caption div
var modMarginBottom = hs.marginBottom;
if (!this.captionId && this.thumbsUserSetId) this.captionId = 'caption-for-'+ this.thumbsUserSetId;
if (this.captionId && (hs.$(this.captionId) || hs.$(this.captionId +'-taken'))) {
this.origCaption = hs.$(this.captionId +'-taken') ? hs.$(this.captionId +'-taken') : hs.$(this.captionId);
this.caption = this.origCaption.cloneNode(1);
modMarginBottom += this.spaceForCaption;
if (!hs.$(this.captionId +'-taken')) this.origCaption.id = this.captionId +'-taken';
if (!hs.$(this.captionId)) this.caption.id = this.captionId;
else this.caption.id = null;
if (this.captionTemplateId && hs.$(this.captionTemplateId)) {
this.origCapTpl = hs.$(this.captionTemplateId);
this.capTpl = this.origCapTpl.cloneNode(1);
this.capTpl.innerHTML
= this.capTpl.innerHTML.replace(/\s/g, ' ').replace('{caption}', this.caption.innerHTML);
this.caption = this.capTpl;
}
}
this.wrapper.appendChild(this.content);
this.content.style.position = 'relative'; // Saf
if (this.caption) this.wrapper.appendChild(this.caption);
this.wrapper.style.left = this.thumbLeft +'px';
this.wrapper.style.top = this.thumbTop +'px';
hs.container.appendChild(this.wrapper);
// correct for borders
this.offsetBorderW = (this.content.offsetWidth - this.thumbWidth) / 2;
this.offsetBorderH = (this.content.offsetHeight - this.thumbHeight) / 2;
var modMarginRight = hs.marginRight + 2 * this.offsetBorderW;
modMarginBottom += 2 * this.offsetBorderH;
var ratio = this.newWidth / this.newHeight;
var minWidth = this.allowSizeReduction ? this.minWidth : this.newWidth;
var minHeight = this.allowSizeReduction ? this.minHeight : this.newHeight;
var justify = { x: 'auto', y: 'auto' };
if (this.align == 'center') {
justify.x = 'center';
justify.y = 'center';
} else {
if (this.anchor.match(/^top/)) justify.y = null;
if (this.anchor.match(/right$/)) justify.x = 'max';
if (this.anchor.match(/^bottom/)) justify.y = 'max';
if (this.anchor.match(/left$/)) justify.x = null;
}
client = new hs.clientInfo();
// justify
this.x = {
min: parseInt(this.thumbLeft) - this.offsetBorderW + this.thumbOffsetBorderW,
span: this.newWidth,
minSpan: this.newWidth justify: justify.x,
marginMin: hs.marginLeft,
marginMax: modMarginRight,
scroll: client.scrollLeft,
clientSpan: client.width,
thumbSpan: this.thumbWidth
};
var oldRight = this.x.min + parseInt(this.thumbWidth);
this.x = this.justify(this.x);
this.y = {
min: parseInt(this.thumbTop) - this.offsetBorderH + this.thumbOffsetBorderH,
span: this.newHeight,
minSpan: this.newHeight justify: justify.y,
marginMin: hs.marginTop,
marginMax: modMarginBottom,
scroll: client.scrollTop,
clientSpan: client.height,
thumbSpan: this.thumbHeight
};
var oldBottom = this.y.min + parseInt(this.thumbHeight);
this.y = this.justify(this.y);
if (this.isHtml) this.htmlSizeOperations();
if (this.isImage) this.correctRatio(ratio);
var x = this.x;
var y = this.y;
// Selectbox bug
var imgPos = {x: x.min - 20, y: y.min - 20, w: x.span + 40, h: y.span + 40 + this.spaceForCaption};
hs.hideSelects = (hs.ie && hs.ieVersion() if (hs.hideSelects) this.showHideElements('SELECT', 'hidden', imgPos);
// Iframes bug
hs.hideIframes = (window.opera || navigator.vendor == 'KDE' || (hs.ie && hs.ieVersion() if (hs.hideIframes) this.showHideElements('IFRAME', 'hidden', imgPos);
// Make outline ready
if (this.objOutline && !this.outlineWhileAnimating) this.positionOutline(x.min, y.min, x.span, y.span);
var o2 = this.objOutline ? this.objOutline.offset : 0;
// Apply size change
this.changeSize(
1,
this.thumbLeft + this.thumbOffsetBorderW - this.offsetBorderW,
this.thumbTop + this.thumbOffsetBorderH - this.offsetBorderH,
this.thumbWidth,
this.thumbHeight,
x.min,
y.min,

JavaScriptは、Webページのインタラクティブ性とダイナミズムを向上させるため、現代のWebサイトの中心にあります。 1)ページを更新せずにコンテンツを変更できます。2)Domapiを介してWebページを操作する、3)アニメーションやドラッグアンドドロップなどの複雑なインタラクティブ効果、4)ユーザーエクスペリエンスを改善するためのパフォーマンスとベストプラクティスを最適化します。

CおよびJavaScriptは、WebAssemblyを介して相互運用性を実現します。 1)CコードはWebAssemblyモジュールにコンパイルされ、JavaScript環境に導入され、コンピューティングパワーが強化されます。 2)ゲーム開発では、Cは物理エンジンとグラフィックスレンダリングを処理し、JavaScriptはゲームロジックとユーザーインターフェイスを担当します。

JavaScriptは、Webサイト、モバイルアプリケーション、デスクトップアプリケーション、サーバー側のプログラミングで広く使用されています。 1)Webサイト開発では、JavaScriptはHTMLおよびCSSと一緒にDOMを運用して、JQueryやReactなどのフレームワークをサポートします。 2)ReactNativeおよびIonicを通じて、JavaScriptはクロスプラットフォームモバイルアプリケーションを開発するために使用されます。 3)電子フレームワークにより、JavaScriptはデスクトップアプリケーションを構築できます。 4)node.jsを使用すると、JavaScriptがサーバー側で実行され、高い並行リクエストをサポートします。

Pythonはデータサイエンスと自動化により適していますが、JavaScriptはフロントエンドとフルスタックの開発により適しています。 1. Pythonは、データ処理とモデリングのためにNumpyやPandasなどのライブラリを使用して、データサイエンスと機械学習でうまく機能します。 2。Pythonは、自動化とスクリプトにおいて簡潔で効率的です。 3. JavaScriptはフロントエンド開発に不可欠であり、動的なWebページと単一ページアプリケーションの構築に使用されます。 4. JavaScriptは、node.jsを通じてバックエンド開発において役割を果たし、フルスタック開発をサポートします。

CとCは、主に通訳者とJITコンパイラを実装するために使用されるJavaScriptエンジンで重要な役割を果たします。 1)cは、JavaScriptソースコードを解析し、抽象的な構文ツリーを生成するために使用されます。 2)Cは、Bytecodeの生成と実行を担当します。 3)Cは、JITコンパイラを実装し、実行時にホットスポットコードを最適化およびコンパイルし、JavaScriptの実行効率を大幅に改善します。

現実世界でのJavaScriptのアプリケーションには、フロントエンドとバックエンドの開発が含まれます。 1)DOM操作とイベント処理を含むTODOリストアプリケーションを構築して、フロントエンドアプリケーションを表示します。 2)node.jsを介してRestfulapiを構築し、バックエンドアプリケーションをデモンストレーションします。

Web開発におけるJavaScriptの主な用途には、クライアントの相互作用、フォーム検証、非同期通信が含まれます。 1)DOM操作による動的なコンテンツの更新とユーザーインタラクション。 2)ユーザーエクスペリエンスを改善するためにデータを提出する前に、クライアントの検証が実行されます。 3)サーバーとのリフレッシュレス通信は、AJAXテクノロジーを通じて達成されます。

JavaScriptエンジンが内部的にどのように機能するかを理解することは、開発者にとってより効率的なコードの作成とパフォーマンスのボトルネックと最適化戦略の理解に役立つためです。 1)エンジンのワークフローには、3つの段階が含まれます。解析、コンパイル、実行。 2)実行プロセス中、エンジンはインラインキャッシュや非表示クラスなどの動的最適化を実行します。 3)ベストプラクティスには、グローバル変数の避け、ループの最適化、constとletsの使用、閉鎖の過度の使用の回避が含まれます。


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