是否有任何工具可以让您在执行网页时“热交换”JavaScript 内容？
我正在寻找类似于 HotSpot 为 Java 所做的事情，一种无需重新加载整个页面即可“热部署”新 JS 代码的方法。
那里有类似的东西吗？
澄清以防人们不理解“热交换”，如lock所示：
“热交换”是指允许我更改页面本身及其 .js 文件中包含的部分代码。
然后这个框架会检测到变化——无论是自动还是通过我的一些指示——并动态地重新加载代码，避免新的服务器端发布（重新加载）。
这种方法将简化调试和错误修复，因为您不需要重新加载页面并从头开始重新开始交互。
有趣的想法:)
我写了以下书签：
function reload(){var scripts=document.getElementsByTagName("script");var head=document.getElementsByTagName("head")[0];var newScripts=[];var removeScripts=[];for(var i=0;i<scripts.length;i++){var parent=scripts[i].parentNode;if(parent==head&&scripts[i].src){var newScript={};newScript.src=scripts[i].src;newScript.innerHTML=scripts[i].innerHTML;newScripts.push(newScript);removeScripts.push(scripts[i]);}}for(var i=0;i<removeScripts.length;i++){head.removeChild(removeScripts[i]);}for(var i=0;i<newScripts.length;i++){var script=document.createElement("script");script.src=newScripts[i].src;script.type="text/javascript";script.innerHTML=newScripts[i].innerHTML;head.appendChild(script);}}
将其添加到新书签的位置，它将重新加载 <head> 中引用的所有 javascript。不确定这在实践中效果如何，但值得一试:) 我想你在编写脚本的方式上必须非常小心，以免将内容多次添加到页面正文中，等等。也许对'reload="true"' 属性的支持可能很有用，这样你就可以只将你的库标记为可重新加载。
完整来源：
function reload() {
var scripts = document.getElementsByTagName("script");
var head = document.getElementsByTagName("head")[0];
var newScripts = [];
var removeScripts = [];
for(var i=0; i < scripts.length; i++) {
var parent = scripts[i].parentNode;
if(parent == head && scripts[i].src) {
var newScript = {};
newScript.src = scripts[i].src;
newScript.innerHTML = scripts[i].innerHTML;
newScripts.push(newScript);
removeScripts.push(scripts[i]);
}
}
for(var i=0; i < removeScripts.length; i++) {
head.removeChild(removeScripts[i]);
}
for(var i=0; i < newScripts.length; i++) {
var script = document.createElement("script");
script.src = newScripts[i].src;
script.type = "text/javascript";
script.innerHTML = newScripts[i].innerHTML;
head.appendChild(script);
}
}
因为我有一个类似的问题要解决，所以我写了一个小的 js lib 来热交换 javascript、css 和图像文件。它当然是 github 上的开源：hotswap.js
希望能帮助到你。
更新：我在这里附上了完整的库源。要使用它，只需将内容复制到文件中（例如：hotswap.js）并将脚本标签插入您的网站，如下所示：
<script src="hotswap.js"></script>
接口：
// refresh .js files
hotswap.refreshAllJs(arrExcludedFiles);
hotswap.refreshJs(arrIncludedFiles);
// refresh .css files
hotswap.refreshAllCss(arrExcludedFiles);
hotswap.refreshCss(arrIncludedFiles);
// refresh images
hotswap.refreshAllImg(arrExcludedFiles);
hotswap.refreshImg(arrIncludedFiles);
// show a gui (this is optional and not required for hotswap to work) (Click on the "H").
hotswap.createGui();
// Examples:
// refresh all .js files
hotswap.refreshAllJs();
// refresh main.css only
hotswap.refreshCss( ["main.js"] );
// refresh all images (img tags) except "dont-refreh-me.png".
hotswap.refreshAllImg( ["dont-refreh-me.png"] );
完整源代码（v. 0.2.0）：
我不得不删除所有评论以使其低于 30000 字符的答案限制。我知道内联 html + css 很难看，但我想将其保留在单个 .js 文件中。
(function() {
var root = this;
var previousHotswap = root.hotswap;
var hotswap = function()
{
if (!(this instanceof hotswap))
{
return new hotswap();
}
else
{
return this;
}
};
root.hotswap = hotswap();
hotswap.prototype.VERSION = '0.2.0';
hotswap.prototype.RND_PARAM_NAME = 'hs982345jkasg89zqnsl';
hotswap.prototype.FILE_REMOVAL_DELAY = 400;
hotswap.prototype.CSS_HTML_PREFIX = 'hs982345jkasg89zqnsl';
hotswap.prototype._prefix = false;
hotswap.prototype._prefixCache = [];
hotswap.prototype._guiCache = {};
hotswap.prototype._guiGuiRefreshInterval = null;
hotswap.prototype._guiHtml = '' +
'<style type="text/css">'+
' #PREFIX'+
' {'+
' display: block;'+
' position: fixed;'+
' top: 20%;/*distance from top*/'+
' right: 0;'+
' z-index: 99999;'+
' width: 20em;'+
' height: auto;'+
' color: black;'+
' background-color: #666666;'+
' font-family: Verdana, sans-serif;'+
' font-size: 0.8em;'+
' -webkit-box-shadow: 0 0px 0.3em 0.1em #999999;'+
' -moz-box-shadow: 0 0px 0.3em 0.1em #999999;'+
' box-shadow: 0 0px 0.3em 0.1em #999999;'+
' }'+
' #PREFIX.mini'+
' {'+
' width: 2.9em;'+
' height: 2.9em;'+
' overflow:hidden;'+
' }'+
' #PREFIX.mini .PREFIX-header input, #PREFIX.mini .PREFIX-list, #PREFIX.mini .PREFIX-footer'+
' {'+
' display:none;'+
' }'+
' #PREFIX.mini .PREFIX-header div'+
' {'+
' display: block;'+
' width: 100%;'+
' height: 100%;'+
' }'+
' #PREFIX input'+
' {'+
' font-size: 1.0em;'+
' border: 0.1em solid #999999;'+
' border-radius: 0.2em;'+
' padding: 0.2em 0.1em;'+
' }'+
' #PREFIX .PREFIX-header'+
' {'+
' height: 2.4em;'+
' overflow:hidden;'+
' padding: 0.4em;'+
' color: white;'+
' background-color: black;'+
' }'+
' #PREFIX .PREFIX-header input'+
' {'+
' width: 83.5%;'+
' height: 1.6em;'+
' }'+
' #PREFIX .PREFIX-header div'+
' {'+
' position: absolute;'+
' top:0;'+
' right:0;'+
' width: 14.5%;'+
' height: 1.6em;'+
' line-height: 1.4em;'+
' text-align: center;'+
' font-size: 2em;'+
' font-weight: bold;'+
' cursor: pointer;'+
' }'+
' #PREFIX .PREFIX-header div:hover'+
' {'+
' background-color: #444444;'+
' }'+
' #PREFIX .PREFIX-list'+
' {'+
' width: 100%;'+
' height: 22em;'+
' overflow: auto;'+
' }'+
' #PREFIX ul'+
' {'+
' list-style-type: none;'+
' list-style-position: inside;'+
' padding: 0;'+
' margin: 0.5em 0.5em 1.2em 0.5em;'+
' }'+
' #PREFIX ul li'+
' {'+
' margin: 0.3em;'+
' padding: 0.5em 0.5em;'+
' color: white;'+
' background-color: #717171;'+
' font-size: 0.9em;'+
' line-height: 1.5em;'+
' cursor: pointer;'+
' }'+
' #PREFIX ul li:hover'+
' {'+
' background-color: #797979;'+
' }'+
' #PREFIX ul li.template'+
' {'+
' display: none;'+
' }'+
' #PREFIX ul li.active'+
' {'+
' background-color: black;'+
' }'+
' #PREFIX ul li.PREFIX-headline'+
' {'+
' color: white;'+
' background-color: transparent;'+
' text-align: center;'+
' font-weight: bold;'+
' cursor: default;'+
' }'+
' #PREFIX .PREFIX-footer'+
' {'+
' padding: 0;'+
' margin:0;'+
' background-color: #444444;'+
' }'+
' #PREFIX .PREFIX-footer ul'+
' {'+
' margin: 0;'+
' padding: 0.5em;'+
' }'+
' #PREFIX .PREFIX-footer ul li'+
' {'+
' color: white;'+
' background-color: black;'+
' font-size: 1.0em;'+
' border-radius: 0.5em;'+
' text-align: center;'+
' height: 2.2em;'+
' line-height: 2.2em;'+
' }'+
' #PREFIX .PREFIX-footer ul li input.PREFIX-seconds'+
' {'+
' text-align: center;'+
' width: 2em;'+
' }'+
' #PREFIX .PREFIX-footer ul li:hover'+
' {'+
' background-color: #222222;'+
' }'+
' #PREFIX .PREFIX-footer ul li.inactive'+
' {'+
' background-color: #666666;'+
' cursor: default;'+
' }'+
' </style>'+
' <div id="PREFIX" class="mini">'+
' <div class="PREFIX-header">'+
' <input id="PREFIX-prefix" placeholder="prefix" type="text" name="" />'+
' <div id="PREFIX-toggle">H</div>'+
' </div>'+
' <div class="PREFIX-list">'+
' <ul id="PREFIX-css">'+
' <li class="PREFIX-headline">CSS</li>'+
' <li class="template"></li>'+
' </ul>'+
' <ul id="PREFIX-js">'+
' <li class="PREFIX-headline">JS</li>'+
' <li class="template"></li>'+
' </ul>'+
' <ul id="PREFIX-img">'+
' <li class="PREFIX-headline">IMG</li>'+
' <li class="template"></li>'+
' </ul>'+
' </div>'+
' <div class="PREFIX-footer">'+
' <ul>'+
' <li id="PREFIX-submit-selected">refresh selected</li>'+
' <li id="PREFIX-submit-start">refresh every <input class="PREFIX-seconds" type="text" value="1" /> sec.</li>'+
' <li id="PREFIX-submit-stop" class="inactive">stop refreshing</li>'+
' <li id="PREFIX-submit-refresh-list">refresh list</li>'+
' </ul>'+
' </div>'+
' </div>';
var
xGetElementById = function(sId){ return document.getElementById(sId) },
xGetElementsByTagName = function(sTags){ return document.getElementsByTagName(sTags) },
xAppendChild = function(parent, child){ return parent.appendChild(child) },
xCloneNode = function(node){ return document.cloneNode(node) },
xCreateElement = function(sTag){ return document.createElement(sTag) },
xCloneNode = function(ele, deep){ return ele.cloneNode(deep) },
xRemove = function(ele)
{
if( typeof ele.parentNode != "undefined" && ele.parentNode )
{
ele.parentNode.removeChild( ele );
}
},
xAddEventListener = function(ele, sEvent, fn, bCaptureOrBubble)
{
if( xIsEmpty(bCaptureOrBubble) )
{
bCaptureOrBubble = false;
}
if (ele.addEventListener)
{
ele.addEventListener(sEvent, fn, bCaptureOrBubble);
return true;
}
else if (ele.attachEvent)
{
return ele.attachEvent('on' + sEvent, fn);
}
else
{
ele['on' + sEvent] = fn;
}
},
xStopPropagation = function(evt)
{
if (evt && evt.stopPropogation)
{
evt.stopPropogation();
}
else if (window.event && window.event.cancelBubble)
{
window.event.cancelBubble = true;
}
},
xPreventDefault = function(evt)
{
if (evt && evt.preventDefault)
{
evt.preventDefault();
}
else if (window.event && window.event.returnValue)
{
window.eventReturnValue = false;
}
},
xContains = function(sHaystack, sNeedle)
{
return sHaystack.indexOf(sNeedle) >= 0
},
xStartsWith = function(sHaystack, sNeedle)
{
return sHaystack.indexOf(sNeedle) === 0
},
xReplace = function(sHaystack, sNeedle, sReplacement)
{
if( xIsEmpty(sReplacement) )
{
sReplacement = "";
}
return sHaystack.split(sNeedle).join(sReplacement);
},
xGetAttribute = function(ele, sAttr)
{
var result = (ele.getAttribute && ele.getAttribute(sAttr)) || null;
if( !result ) {
result = ele[sAttr];
}
if( !result ) {
var attrs = ele.attributes;
var length = attrs.length;
for(var i = 0; i < length; i++)
if(attrs[i].nodeName === sAttr)
result = attrs[i].nodeValue;
}
return result;
},
xSetAttribute = function(ele, sAttr, value)
{
if(ele.setAttribute)
{
ele.setAttribute(sAttr, value)
}
else
{
ele[sAttr] = value;
}
},
xGetParent = function(ele)
{
return ele.parentNode || ele.parentElement;
},
xInsertAfter = function( refEle, newEle )
{
return xGetParent(refEle).insertBefore(newEle, refEle.nextSibling);
},
xBind = function(func, context)
{
if (Function.prototype.bind && func.bind === Function.prototype.bind)
{
return func.bind(context);
}
else
{
return function() {
if( arguments.length > 2 )
{
return func.apply(context, arguments.slice(2));
}
else
{
return func.apply(context);
}
};
}
},
xIsEmpty = function(value)
{
var ret = true;
if( value instanceof Object )
{
for(var i in value){ if(value.hasOwnProperty(i)){return false}}
return true;
}
ret = typeof value === "undefined" || value === undefined || value === null || value === "";
return ret;
},
xAddClass = function(ele, sClass)
{
var clazz = xGetAttribute( ele, "class" );
if( !xHasClass(ele, sClass) )
{
xSetAttribute( ele, "class", clazz + " " + sClass );
}
},
xRemoveClass = function(ele, sClass)
{
var clazz = xGetAttribute( ele, "class" );
if( xHasClass(ele, sClass) )
{
xSetAttribute( ele, "class", xReplace( clazz, sClass, "" ) );
}
},
xHasClass = function(ele, sClass)
{
var clazz = xGetAttribute( ele, "class" );
return !xIsEmpty(clazz) && xContains( clazz, sClass );
};
hotswap.prototype._recreate = function( type, xcludedFiles, xcludeComparator, nDeleteDelay, bForceRecreation )
{
if( typeof nDeleteDelay == "undefined")
{
nDeleteDelay = 0;
}
if( typeof bForceRecreation == "undefined")
{
bForceRecreation = false;
}
var tags = this._getFilesByType(type, xcludedFiles, xcludeComparator);
var newTags = [];
var removeTags = [];
var i, src, detected, node, srcAttributeName;
for(i=0; i<tags.length; i++)
{
node = tags[i].node;
srcAttributeName = tags[i].srcAttributeName;
var newNode = {
node: null,
oldNode: node,
parent: xGetParent(node)
};
if( bForceRecreation )
{
newNode.node = xCreateElement("script");
}
else
{
newNode.node = xCloneNode(node, false);
}
for (var p in node) {
if (node.hasOwnProperty(p)) {
newNode.node.p = node.p;
}
}
src = xGetAttribute( node, srcAttributeName );
xSetAttribute( newNode.node, srcAttributeName, this._updatedUrl(src) );
newTags.push(newNode);
removeTags.push(node);
}
for(var i=0; i < newTags.length; i++) {
xInsertAfter(newTags[i].oldNode, newTags[i].node);
}
if( nDeleteDelay > 0 )
{
for(var i=0; i < removeTags.length; i++) {
xSetAttribute(removeTags[i], "data-hotswap-deleted", "1");
}
setTimeout( function() {
for(var i=0; i < removeTags.length; i++) {
xRemove(removeTags[i]);
}
}, nDeleteDelay);
}
else
{
for(var i=0; i < removeTags.length; i++) {
xRemove(removeTags[i]);
}
}
};
hotswap.prototype._reload = function( type, xcludedFiles, xcludeComparator )
{
var tags = this._getFilesByType(type, xcludedFiles, xcludeComparator);
var i, src, node, srcAttributeName;
for(i=0; i<tags.length; i++)
{
node = tags[i].node;
srcAttributeName = tags[i].srcAttributeName;
// update the src property
src = xGetAttribute( node, srcAttributeName );
xSetAttribute( node, srcAttributeName, this._updatedUrl(src) );
}
};
hotswap.prototype._getFilesByType = function( type, xcludedFiles, xcludeComparator )
{
var files;
switch(type)
{
case "css":
files = this._getFiles(
"css",
"link",
function(ele)
{
return (xGetAttribute(ele, "rel") == "stylesheet" || xGetAttribute(ele, "type") == "text/css");
},
"href",
xcludedFiles,
xcludeComparator
)
break;
case "js":
files = this._getFiles(
"js",
"script",
function(ele)
{
return (xGetAttribute(ele, "type") == "" || xGetAttribute(ele, "type") == "text/javascript");
},
"src",
xcludedFiles,
xcludeComparator
)
break;
case "img":
files = this._getFiles(
"img",
"img",
function(ele)
{
return (xGetAttribute(ele, "src") != "");
},
"src",
xcludedFiles,
xcludeComparator
)
break;
}
return files;
}
hotswap.prototype._getFiles = function( type, tagName, tagFilterFunc, srcAttributeName, xcludedFiles, xcludeComparator )
{
if( typeof xcludedFiles == "undefined" || !xcludedFiles)
{
xcludedFiles = [];
}
if( typeof xcludeComparator == "undefined" || !xcludeComparator)
{
xcludeComparator = false;
}
var fileNodes = [];
var tags = xGetElementsByTagName(tagName);
var src, detected, node;
for(var i=0; i<tags.length; i++) {
node = tags[i];
src = xGetAttribute(node,[srcAttributeName]);
if( xIsEmpty( xGetAttribute(node, "data-hotswap-deleted") ) )
{
if(src && tagFilterFunc(node))
{
detected = false;
for(var j=0; j<xcludedFiles.length; j++) {
if( xContains(src,xcludedFiles[j]) )
{
detected = true;
break;
}
}
if( detected == xcludeComparator )
{
fileNodes.push({
type: type,
node : node,
tagName : tagName,
srcAttributeName : srcAttributeName
});
}
}
}
}
return fileNodes;
};
hotswap.prototype._updatedUrl = function( url, getCleanUrl )
{
var cleanUrl;
if( typeof getCleanUrl == "undefined")
{
getCleanUrl = false;
}
url = cleanUrl = url.replace(new RegExp("(\\?|&)"+this.RND_PARAM_NAME+"=[0-9.]*","g"), "");
var queryString = "", randomizedQueryString = "";
if( xContains(url, "?") )
{
if(xContains(url, "&" + this.RND_PARAM_NAME))
{
queryString = url.split("&" + this.RND_PARAM_NAME).slice(1,-1).join("");
}
randomizedQueryString = queryString + "&" + this.RND_PARAM_NAME + "=" + Math.random() * 99999999;
}
else
{
if(xContains(url, "?" + this.RND_PARAM_NAME))
{
queryString = url.split("?" + this.RND_PARAM_NAME).slice(1,-1).join("");
}
randomizedQueryString = queryString + "?" + this.RND_PARAM_NAME + "=" + Math.random() * 99999999;
}
var foundAt = -1;
if( !xIsEmpty( this._prefixCache ) )
{
for(var i=0; i<this._prefixCache.length; ++i)
{
if( !xIsEmpty(this._prefixCache[i]) && foundAt < 0 )
{
for(var h=0; h<this._prefixCache[i].length; ++h)
{
if( this._prefixCache[i][h] == cleanUrl + queryString )
{
cleanUrl = this._prefixCache[i][0];
foundAt = i;
break;
}
}
}
}
}
var prefixHistory = [cleanUrl + queryString];
var applyPrefix = true;
if( prefixHistory[0].match( new RegExp('^[A-Za-z0-9-_]+://') ) )
{
applyPrefix = false;
}
var prefix = this._prefix;
if( !xIsEmpty(this._prefix) && this._prefix )
{
prefixHistory.push( this._prefix + cleanUrl + queryString );
if(foundAt >= 0)
{
this._prefixCache[foundAt] = prefixHistory;
}
else
{
this._prefixCache.push( prefixHistory );
}
}
else
{
prefix = "";
}
if( !applyPrefix )
{
prefix = "";
}
url = prefix + cleanUrl + randomizedQueryString;
return (getCleanUrl) ? (cleanUrl + queryString) : url;
}
hotswap.prototype.refreshAllJs = function( excludedFiles )
{
if( typeof excludedFiles == "undefined" || !excludedFiles)
{
excludedFiles = []
}
excludedFiles.push("hotswap.js");
this._recreate( "js", excludedFiles, false, 0, true );
};
hotswap.prototype.refreshJs = function( includedFiles )
{
this._recreate( "js", includedFiles, true, 0, true );
};
hotswap.prototype.refreshAllCss = function( excludedFiles )
{
this._recreate( "css", excludedFiles, false, this.FILE_REMOVAL_DELAY );
};
hotswap.prototype.refreshCss = function( includedFiles )
{
this._recreate( "css", includedFiles, true, this.FILE_REMOVAL_DELAY );
};
hotswap.prototype.refreshAllImg = function( excludedFiles )
{
this._reload( "img", excludedFiles, false );
};
hotswap.prototype.refreshImg = function( includedFiles )
{
this._reload( "img", includedFiles, true );
};
hotswap.prototype.setPrefix = function( prefix )
{
this._prefix = prefix;
var gui = xGetElementById(this.CSS_HTML_PREFIX + "_wrapper");
if( gui )
{
if( !xIsEmpty(this._prefix) && this._prefix )
{
xGetElementById(this.CSS_HTML_PREFIX+"-prefix").value = this._prefix;
}
else
{
xGetElementById(this.CSS_HTML_PREFIX+"-prefix").value = "";
}
}
}
hotswap.prototype.getPrefix = function()
{
return this._prefix;
}
hotswap.prototype.createGui = function( nDistanceFromTopInPercent )
{
if( xIsEmpty(nDistanceFromTopInPercent) )
{
nDistanceFromTopInPercent = 20;
}
var gui = xGetElementById(this.CSS_HTML_PREFIX + "_wrapper");
if( gui )
{
xRemove(xGetElementById(this.CSS_HTML_PREFIX + "_wrapper"));
}
gui = xCreateElement("div");
xSetAttribute( gui, "id", this.CSS_HTML_PREFIX + "_wrapper" );
var guiHtml = xReplace( this._guiHtml, "PREFIX", this.CSS_HTML_PREFIX );
guiHtml = xReplace( guiHtml, '20%;/*distance from top*/', nDistanceFromTopInPercent+'%;/*distance from top*/' );
gui.innerHTML = guiHtml;
xAppendChild( xGetElementsByTagName("body")[0], gui );
if( !xIsEmpty(this._guiCache) )
{
this._guiCache = {};
}
this._guiCreateFilesList();
if( !xIsEmpty(this._prefix) && this._prefix )
{
xGetElementById(this.CSS_HTML_PREFIX+"-prefix").value = this._prefix;
}
var self = this;
xAddEventListener( xGetElementById(this.CSS_HTML_PREFIX+"-toggle"), "click", function(evt)
{
var gui = xGetElementById(self.CSS_HTML_PREFIX);
if( xHasClass(gui, "mini") )
{
xRemoveClass( gui, "mini" );
}
else
{
xAddClass( gui, "mini" );
}
});
xAddEventListener( xGetElementById(this.CSS_HTML_PREFIX+"-prefix"), "blur", function(evt)
{
self._guiPrefixChanged(evt.target);
});
xAddEventListener( xGetElementById(this.CSS_HTML_PREFIX+"-submit-selected"), "click", function(evt)
{
self._guiRefreshSelected()
});
xAddEventListener( xGetElementById(this.CSS_HTML_PREFIX+"-submit-start"), "click", function(evt)
{
if( xGetAttribute(evt.target, "class") != this.CSS_HTML_PREFIX+"-seconds" )
{
var input, nSeconds = 1;
var children = evt.target.children;
for(var i=0; i<children.length; ++i)
{
if( xGetAttribute(children[i], "class") == this.CSS_HTML_PREFIX+"-seconds" )
{
nSeconds = children[i].value;
}
}
self._guiRefreshSelected();
self._guiRefreshStart( nSeconds );
}
});
xAddEventListener( xGetElementById(this.CSS_HTML_PREFIX+"-submit-stop"), "click", function(evt)
{
self._guiRefreshStop();
});
xAddEventListener( xGetElementById(this.CSS_HTML_PREFIX+"-submit-refresh-list"), "click", xBind(self.guiRefreshFilesList,self) );
}
hotswap.prototype._guiCreateFilesList = function()
{
this._guiCache.files = [];
this._guiCache.activeFiles = {
"css" : [],
"js" : [],
"img" : []
};
var self = this;
var createFilesList = function(list, files)
{
var i, j, r, clone, template, file, fileName, nodesToRemove = [];
for(j=0; j<list.children.length; ++j)
{
if( xHasClass( list.children[j], "template" ) )
{
template = list.children[j];
}
else
{
if( !xHasClass( list.children[j], self.CSS_HTML_PREFIX + "-headline" ) )
{
nodesToRemove.push(list.children[j]);
}
}
}
for(r=0; r<nodesToRemove.length; ++r)
{
xRemove( nodesToRemove[r] );
}
for(i=0; i<files.length; ++i)
{
file = files[i];
clone = xCloneNode( template );
xRemoveClass( clone, "template" );
fileName = self._updatedUrl( xGetAttribute( file.node, file.srcAttributeName ), true );
if( !xContains(self._guiCache.files,fileName) )
{
self._guiCache.files.push(fileName);
clone.innerHTML = fileName;
xAppendChild( list, clone );
xAddEventListener( clone, "click", (function(type, fileName){
return function(evt){
xStopPropagation(evt);
xPreventDefault(evt);
self._guiClickedFile(evt.target, type, fileName);
};
})(file.type, fileName)
);
}
}
}
createFilesList( xGetElementById(this.CSS_HTML_PREFIX+"-css"), this._getFilesByType("css") );
createFilesList( xGetElementById(this.CSS_HTML_PREFIX+"-js"), this._getFilesByType("js", ["hotswap.js"]) );
createFilesList( xGetElementById(this.CSS_HTML_PREFIX+"-img"), this._getFilesByType("img") );
}
hotswap.prototype.deleteGui = function()
{
var gui = xGetElementById(this.CSS_HTML_PREFIX + "_wrapper");
if( gui )
{
xRemove(xGetElementById(this.CSS_HTML_PREFIX + "_wrapper"));
}
}
hotswap.prototype._guiPrefixChanged = function(ele)
{
if( ele )
{
this.setPrefix(ele.value);
}
},
hotswap.prototype._guiClickedFile = function( ele, sType, sFileName )
{
var activeFiles = this._guiCache.activeFiles[sType];
if( xContains( activeFiles, sFileName ) )
{
xRemoveClass(ele, "active");
activeFiles.splice( activeFiles.indexOf(sFileName), 1 )
}
else
{
xAddClass(ele, "active");
activeFiles.push( sFileName );
}
},
hotswap.prototype._guiRefreshSelected = function()
{
var activeFiles = this._guiCache.activeFiles;
if( activeFiles['css'].length > 0 )
{
this.refreshCss( activeFiles['css'] );
}
if( activeFiles['js'].length > 0 )
{
this.refreshJs( activeFiles['js'] );
}
if( activeFiles['img'].length > 0 )
{
this.refreshImg( activeFiles['img'] );
}
},
hotswap.prototype._guiRefreshStart = function( nSeconds )
{
if( this._guiGuiRefreshInterval !== null )
{
this._guiRefreshStop();
}
var self = this;
this._guiGuiRefreshInterval = setInterval( xBind(this._guiRefreshSelected, this), nSeconds * 1000 );
xAddClass( xGetElementById(this.CSS_HTML_PREFIX+"-submit-start"), "inactive" );
xRemoveClass( xGetElementById(this.CSS_HTML_PREFIX+"-submit-stop"), "inactive" );
},
hotswap.prototype._guiRefreshStop = function()
{
if( this._guiGuiRefreshInterval !== null )
{
clearInterval(this._guiGuiRefreshInterval);
}
this._guiGuiRefreshInterval = null;
xRemoveClass( xGetElementById(this.CSS_HTML_PREFIX+"-submit-start"), "inactive" );
xAddClass( xGetElementById(this.CSS_HTML_PREFIX+"-submit-stop"), "inactive" );
}
hotswap.prototype.guiRefreshFilesList = function()
{
this._guiCreateFilesList();
}
}).call(this);
我确定这里没有太多人知道你所说的热交换是什么意思，但正如 virtuosiMedia 所说，mootools 允许这样做，如果你不那么信任 mootools，那么 jquery 有一个相同的插件，如果你不想要框架，你总是可以通过添加这些脚本dom
但我确定您不允许更改您已经定义的头级脚本，因为通过 DOM 动态添加的任何脚本都只是正文级
您可以使用 RequireJS 前端模块系统轻松地热重载 JavaScript 代码，我最近写了一篇关于它的文章（2015 年 9 月）
https://medium.com/@the1mills/hot-reloading-with-react-requirejs-7b2aa6cb06e1
您基本上删除了 AMD 模块的缓存，RequireJS 将从文件系统中获取新的缓存。
诀窍是使用 websockets（socket.io 工作正常）告诉浏览器文件已更改，并删除缓存并重新请求文件。
其余信息在文章中
如果您想对整个JavaScript 文件执行此操作，请参阅此问题以获得足够相似的内容，您应该能够了解该想法的基础知识。