当前位置: 首页 > 图文教程 > 网络编程 > Javascript > 简单JS代码压缩器

Javascript
javascript 图片放大效果函数
javascript 随机抽奖程序代码
JavaScript 读取图片实例代码
JQuery toggle使用分析
jQuery html()等方法介绍
jquery中的$(document).ready()与window.onload的区别
JS获取dom 对象 ajax操作 读写cookie函数
ExtJS Window 最小化的一种方法
div移动 输入框不能输入的问题
js trim函数 去空格函数与正则集锦
js url传值中文乱码之解决之道
页面版文本框智能提示JS代码
ExtJS的FieldSet的column列布局
Jquery中增加参数与Json转换代码
ExtJS Grid使用SimpleStore、多选框的方法
javascript实现拖拽并替换网页块元素
javascript 设置文本框中焦点的位置
面向对象的编程思想在javascript中的运用上部
javascript call方法使用说明
javascript instanceof 与typeof使用说明

Javascript 中的 简单JS代码压缩器


出处:互联网   整理: 软晨网(RuanChen.com)   发布: 2009-09-12   浏览: 121 ::
收藏到网摘: n/a

1、
复制代码 代码如下:

<!--
- From: <a href="http://www.iecn.net/bbs/view/105499.html" target="_blank">http://www.iecn.net/bbs/view/105499.html</a>
- IECN.NET 2006-09-22
-->
<script language="javascript"
type="text/javascript">
//去除所有的注释
String.prototype.DeleteComment = function ()
{
var str = this.replace(/(['"])(.+?)(['"])/g,function(s,s1,s2,s3){return s1+s2.replace(/[\/\*]/g,"\\$&")+s3});
str = str.replace(/\/\/[^\r]+|\/\*[\s\S]+?\*\//g,"");
str = str.replace(/(['"])(.+?)(['"])/g,function(s,s1,s2,s3){return s1+s2.replace(/\\([^\\])/g,"$1")+s3});
return str;
}
//格式代码
String.prototype.FormatCode = function ()
{
return this.replace(/\\$/mg,"").replace(/[^\s>;]$/mg,"$&;");
}
//删除字符串前后多余的空格
String.prototype.Trim = function (m)
{
return this.replace(m ? /^\s*|\s*$/mg : /^\s*|\s*$/g, "");
}
//运行代码
function RunCode(obj)
{
window.open('','_blank').document.write(obj.value);
}
</script>
测试代码:<br/>
<textArea id="Text" rows="25" cols="80">
<script language="JavaScript">
/*
测试代码
*/
var x=5;
document.write("x = // " + x);
document.write("bh/* " + x);
document.write("x =jjhj */hhhhhh " + x);
document.write("x = // " + x);
alert(22)
alert(22)
var a="/fwe/////wefawef";
alert(/^\/*[^\/]*$/.test(a));
//注释
</script>
</textArea> <br/><br/>
第1步:<button onclick="Text.value = Text.value.DeleteComment();">删除注释</button> <br/> <br/>
第2步:<button onclick="Text.value=Text.value.FormatCode();">格式代码</button> <br/> <br/>
第3步:<button onclick="Text.value=Text.value.Trim(true);">去除两边空格</button> <br/> <br/>
第4步:<button onclick="RunCode(Text);">运行代码</button> <br/> <br/>

2、
复制代码 代码如下:
<HTML><HEAD><TITLE>Format</TITLE>
<META content="MSHTML 6.00.2800.1528" name=GENERATOR>
<META content="" name=Author>
<META content="" name=Keywords>
<META content="" name=Description></HEAD>
<BODY>
<SCRIPT language=JavaScript>
<!--
/**//**//**//**
** ==================================================================================================
** 类名:CLASS_FORMATER
** 功能:JS格式化
** 示例:
---------------------------------------------------------------------------------------------------
var xx = new CLASS_FORMATER(code);
document.getElementById("display").innerHTML = xx.format();
---------------------------------------------------------------------------------------------------
** 作者:ttyp
** 邮件:<a href="mailto:[email protected]">[email protected]</a>
** 日期:2006-5-21
** 版本:0.1
** ==================================================================================================
**/
function CLASS_FORMAT(code){
//哈希表类
function Hashtable(){
this._hash = new Object();
this.add = function(key,value){
if(typeof(key)!="undefined"){
if(this.contains(key)==false){
this._hash[key]=typeof(value)=="undefined"?null:value;
return true;
} else {
return false;
}
} else {
return false;
}
}
this.remove = function(key){delete this._hash[key];}
this.count = function(){var i=0;for(var k in this._hash){i++;} return i;}
this.items = function(key){return this._hash[key];}
this.contains = function(key){return typeof(this._hash[key])!="undefined";}
this.clear = function(){for(var k in this._hash){delete this._hash[k];}}
}
this._caseSensitive = true;
//字符串转换为哈希表
this.str2hashtable = function(key,cs){
var _key = key.split(/,/g);
var _hash = new Hashtable();
var _cs = true;

if(typeof(cs)=="undefined"||cs==null){
_cs = this._caseSensitive;
} else {
_cs = cs;
}
for(var i in _key){
if(_cs){
_hash.add(_key[i]);
} else {
_hash.add((_key[i]+"").toLowerCase());
}
}
return _hash;
}
//获得需要转换的代码
this._codetxt = code;
if(typeof(syntax)=="undefined"){
syntax = "";
}
this._deleteComment = false;
//是否大小写敏感
this._caseSensitive = true;
//可以后面加块语句的关键字
this._blockElement = this.str2hashtable("switch,if,while,try,finally");
//是函数申明
this._function = this.str2hashtable("function");
//本行括号内分号不做换行
this._isFor = "for";
this._choiceElement = this.str2hashtable("else,catch");
this._beginBlock = "{";
this._endBlock = "}";
this._singleEyeElement = this.str2hashtable("var,new,return,else,delete,in,case");
//得到分割字符
this._wordDelimiters= "  ,.?!;:\\/<>(){}[]\"'\r\n\t=+-|*%@#$^&";
//引用字符
this._quotation = this.str2hashtable("\",'");
//行注释字符
this._lineComment = "//";
//转义字符
this._escape = "\\";
//多行引用开始
this._commentOn = "/*";
//多行引用结束
this._commentOff = "*/";
//行结束词
this._rowEnd = ";";
this._in = "in";

this.isCompress = false;
this.style = 0;
this._tabNum = 0;

this.format = function() {
var codeArr = new Array();
var word_index = 0;
var htmlTxt = new Array();
if(this.isCompress){
this._deleteComment = true;
}

//得到分割字符数组(分词)
for (var i = 0; i < this._codetxt.length; i++) {
if (this._wordDelimiters.indexOf(this._codetxt.charAt(i)) == -1) { //找不到关键字
if (codeArr[word_index] == null || typeof(codeArr[word_index]) == 'undefined') {
codeArr[word_index] = "";
}
codeArr[word_index] += this._codetxt.charAt(i);
} else {
if (typeof(codeArr[word_index]) != 'undefined' && codeArr[word_index].length > 0)
word_index++;
codeArr[word_index++] = this._codetxt.charAt(i);
}
}

var quote_opened = false; //引用标记
var slash_star_comment_opened = false; //多行注释标记
var slash_slash_comment_opened = false; //单行注释标记
var line_num = 1; //行号
var quote_char = ""; //引用标记类型
var function_opened = false;
var bracket_open = false;
var for_open = false;
//按分割字,分块显示
for (var i=0; i <=word_index; i++){
//处理空行(由于转义带来)
if(typeof(codeArr[i])=="undefined"||codeArr[i].length==0){
continue;
} else if(codeArr[i]==" "||codeArr[i]=="\t"){
if(slash_slash_comment_opened||slash_star_comment_opened){
if(!this._deleteComment){
htmlTxt[htmlTxt.length] = codeArr[i];
}
}
if(quote_opened){
htmlTxt[htmlTxt.length] = codeArr[i];
}
} else if(codeArr[i]=="\n"){
//处理换行
} else if (codeArr[i] == "\r"){
slash_slash_comment_opened = false;
quote_opened = false;
line_num++;
if(!this.isCompress){
htmlTxt[htmlTxt.length] = "\r\n"+ this.getIdent();
}
//处理function里的参数标记
} else if (!slash_slash_comment_opened&&!slash_star_comment_opened && !quote_opened &&this.isFunction(codeArr[i])){
htmlTxt[htmlTxt.length] = codeArr[i] + " ";
function_opened = true;
} else if (!slash_slash_comment_opened&&!slash_star_comment_opened && !quote_opened &&codeArr[i]==this._isFor){
htmlTxt[htmlTxt.length] = codeArr[i];
for_open = true;
} else if (!slash_slash_comment_opened&&!slash_star_comment_opened && !quote_opened &&codeArr[i]=="("){
bracket_open = true;
htmlTxt[htmlTxt.length] = codeArr[i];
} else if (!slash_slash_comment_opened&&!slash_star_comment_opened && !quote_opened &&codeArr[i]==")"){
bracket_open = false;
htmlTxt[htmlTxt.length] = codeArr[i];
} else if (!slash_slash_comment_opened&&!slash_star_comment_opened && !quote_opened &&codeArr[i]==this._rowEnd){
if(!this.isCompress){
if(!for_open){
if(i<word_index&&(codeArr[i+1]!="\r"&&codeArr[i+1]!="\n")){
htmlTxt[htmlTxt.length] = codeArr[i] + "\n" + this.getIdent();
}else{
htmlTxt[htmlTxt.length] = codeArr[i] + this.getIdent();
}
}else{
htmlTxt[htmlTxt.length] = codeArr[i];
}
}else{
htmlTxt[htmlTxt.length] = codeArr[i];
}
} else if(!slash_slash_comment_opened&&!slash_star_comment_opened && !quote_opened &&codeArr[i]==this._beginBlock){
for_open = false;
if(!this.isCompress){
switch(this.style){
case 0:
this._tabNum++;
htmlTxt[htmlTxt.length] = codeArr[i] + "\n" + this.getIdent();
break;
case 1:
htmlTxt[htmlTxt.length] = "\n" + this.getIdent();
this._tabNum++;
htmlTxt[htmlTxt.length] = codeArr[i] + "\n"+ this.getIdent();
break;
default:
this._tabNum++;
htmlTxt[htmlTxt.length] = codeArr[i];
break;
}
}else{
htmlTxt[htmlTxt.length] = codeArr[i];
}
} else if(!slash_slash_comment_opened&&!slash_star_comment_opened && !quote_opened &&codeArr[i]==this._endBlock){
if(!this.isCompress){
this._tabNum--;
if(i<word_index&&codeArr[i+1]!=this._rowEnd){
htmlTxt[htmlTxt.length] = "\n" + this.getIdent() + codeArr[i];
}else{
htmlTxt[htmlTxt.length] = "\n" + this.getIdent() + codeArr[i];
}
}else{
if(i<word_index&&codeArr[i+1]!=this._rowEnd){
htmlTxt[htmlTxt.length] = codeArr[i] + this._rowEnd;
}else{
htmlTxt[htmlTxt.length] = codeArr[i];
}
}
//处理关键字
} else if (!slash_slash_comment_opened&&!slash_star_comment_opened && !quote_opened && this.isBlockElement(codeArr[i])){
htmlTxt[htmlTxt.length] = codeArr[i];
//处理内置对象(后面加一个空格)
} else if (!slash_slash_comment_opened&&!slash_star_comment_opened && !quote_opened && this.isSingleEyeElement(codeArr[i])){
if(codeArr[i]==this._in){
htmlTxt[htmlTxt.length] = " ";
}
htmlTxt[htmlTxt.length] = codeArr[i] + " ";
//处理双引号(引号前不能为转义字符)
} else if (!slash_star_comment_opened&&!slash_slash_comment_opened&&this._quotation.contains(codeArr[i])){
if (quote_opened){
//是相应的引号
if(quote_char==codeArr[i]){
htmlTxt[htmlTxt.length] = codeArr[i];
quote_opened = false;
quote_char = "";
} else {
htmlTxt[htmlTxt.length] = codeArr[i];
}
} else {
htmlTxt[htmlTxt.length] = codeArr[i];
quote_opened = true;
quote_char = codeArr[i];
}
//处理转义字符
} else if(codeArr[i] == this._escape){
htmlTxt[htmlTxt.length] = codeArr[i];
if(i<word_index-1){
if(codeArr[i+1].charCodeAt(0)>=32&&codeArr[i+1].charCodeAt(0)<=127){
htmlTxt[htmlTxt.length] = codeArr[i+1].substr(0,1);
htmlTxt[htmlTxt.length] = codeArr[i+1].substr(1);
i=i+1;
}
}
//处理多行注释的开始
} else if (!slash_slash_comment_opened && !slash_star_comment_opened&&!quote_opened&&this.isStartWith(this._commentOn,codeArr,i)){
slash_star_comment_opened = true;
if(!this._deleteComment){
htmlTxt[htmlTxt.length] = this._commentOn;
}
i = i + this.getSkipLength(this._commentOn);
//处理单行注释
} else if (!slash_slash_comment_opened && !slash_star_comment_opened&&!quote_opened&&this.isStartWith(this._lineComment,codeArr,i)){
slash_slash_comment_opened = true;
if(!this._deleteComment){
htmlTxt[htmlTxt.length] = this._lineComment;
}
i = i + this.getSkipLength(this._lineComment);
//处理忽略词
} else if (!slash_slash_comment_opened && !slash_star_comment_opened&&!quote_opened&&this.isStartWith(this._ignore,codeArr,i)){
slash_slash_comment_opened = true;
htmlTxt[htmlTxt.length] = this._ignore;
i = i + this.getSkipLength(this._ignore);
//处理多行注释结束
} else if (!quote_opened&&!slash_slash_comment_opened&&this.isStartWith(this._commentOff,codeArr,i)){
if (slash_star_comment_opened) {
slash_star_comment_opened = false;
if(!this._deleteComment){
htmlTxt[htmlTxt.length] = this._commentOff;
}
i = i + this.getSkipLength(this._commentOff);
}
} else {
//不是在字符串中
if(!quote_opened){
//如果不是在注释重
if(!slash_slash_comment_opened && !slash_star_comment_opened){
htmlTxt[htmlTxt.length] = codeArr[i];
//注释中
}else{
if(!this._deleteComment){
htmlTxt[htmlTxt.length] = codeArr[i];
}
}
}else{
htmlTxt[htmlTxt.length] = codeArr[i];
}
}
}
return htmlTxt.join("");
}
this.isStartWith = function(str,code,index){
if(typeof(str)!="undefined"&&str.length>0){
var cc = new Array();
for(var i=index;i<index+str.length;i++){
cc[cc.length] = code[i];
}
var c = cc.join("");
if(this._caseSensitive){
if(str.length>=code[index].length&&c.indexOf(str)==0){
return true;
}
}else{
if(str.length>=code[index].length&&c.toLowerCase().indexOf(str.toLowerCase())==0){
return true;
}
}
return false;
} else {
return false;
}
}
this.isFunction = function(val){
return this._function.contains(this._caseSensitive?val:val.toLowerCase());
}
this.isBlockElement = function(val) {
return this._blockElement.contains(this._caseSensitive?val:val.toLowerCase());
}
this.isChoiceElement = function(val) {
return this._choiceElement.contains(this._caseSensitive?val:val.toLowerCase());
}
this.isSingleEyeElement = function(val) {
return this._singleEyeElement.contains(this._caseSensitive?val:val.toLowerCase());
}
this.isNextElement = function(from,word){
for(var i=from;i<word.length;i++){
if(word[i]!=" "&&word[i]!="\t"&&word[i]!="\r"&&word[i]!="\n"){
return this.isChoiceElement(word[i]);
}
}
return false;
}
this.getSkipLength = function(val){
var count = 0;
for(var i=0;i<val.length;i++){
if(this._wordDelimiters.indexOf(val.charAt(i))>=0){
count++;
}
}
if(count>0){
count=count-1;
}
return count;
}
this.getIdent=function(){
var n = [];
for(var i=0;i<this._tabNum;i++){
n[n.length] = "\t";
}
return n.join("");
}
}
function doformat(o){
var htmltxt = "";
if (o == null){
alert("domNode is null!");
return;
}
var _codetxt = "";
if(typeof(o)=="object"){
switch(o.tagName){
case "TEXTAREA":
case "INPUT":
_codetxt = o.value;
break;
case "DIV":
case "SPAN":
_codetxt = o.innerText;
break;
default:
_codetxt = o.innerHTML;
break;
}
}else{
_codetxt = o;
}
var _syn = new CLASS_FORMAT(_codetxt);
htmltxt = _syn.format();
return htmltxt;
}

function go()
{
var code = document.getElementById("code").value;
var xx = new CLASS_FORMAT(code);
var a = new Date();
if(document.getElementById('cboOperate').selectedIndex==1){
xx.isCompress=true;
}else{
xx.style = parseInt(document.getElementById('cboStyle').value);
}
document.getElementById("display").value = xx.format();
alert("共花:" + (new Date().getTime()-a.getTime()) + "ms");
}
//-->
</SCRIPT>
<TEXTAREA id=code rows=12 cols=100>
/*
这个是一个类
*/

function xx (num,str){//说明
var a = num;this.aa = a;
this.bb = function(){alert(str);}
this.cc = function(){for(var i=0;i<10;i++){document.title=i;}}};
xx.prototype.dd= function(){alert("d d kd");}
var a = new xx(100,"hello"),b=new xx(0,"ttyp");
if(1>2) { alert();
}
else {
alert(" hell ");
}
a.bb();
b.dd();
alert(a.aa);
</TEXTAREA> <BR>
<select id="cboOperate" onchange="if(this.selectedIndex==1)document.getElementById('cboStyle').disabled=true;else document.getElementById('cboStyle').disabled=false;">
<option value="0">格式化</option>
<option value="1">压缩</option>
</select>
<select id="cboStyle">
<option value="0">经典</option>
<option value="1">微软</option>
</select>
<INPUT onclick=go() type=button value=go><br>
<textarea id=display rows=12 cols=100>
</textarea>
</BODY></HTML>