I was told something about js module framework two years ago. But without a deep dive into it, so that I have to ride out large bundles of js files in a mess on our projects for a long time. After kejun’s YUI presentation on D2 2009, I thought that it’s time to change.

Why use js module?

1, better js organization, readable + flexible + dependencies ordering

2, better performance, asynchronize loading JIT

How we did it before?

1, inline script in jsp : hard to unittest, make the file looks tedious and ugly

2, separated js script file: bad organization, too many ugly import tag <script>

What is the existed solution?

1, YUI module: http://developer.yahoo.com/yui/yuiloader/

2, Jawr: a tunable packaging solution for Javascript and CSS written in java

3, jQuery getSscript: http://ejohn.org/blog/degrading-script-tags/

4, jspkg: http://jspkg.sourceforge.net/docs/index.html

5, module.js http://ajaxian.com/archives/modulesjs-a-new-stand-alone-javascript-module-loader

 to do ...

 $('selector').data('meaningfullname', 'this is the data I am storing');

// then later getting the data with

$('selector').data('meaningfullname');

    $('div.edit').livequery('click', function(){

//go into edit mode

});

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    var hashCode = function(element){

return element.sort().toSource();

}

Array.prototype.dell = function(hashCode){

var deleList = [];

var obj = {};

do {

var ele = this.pop();

var key = hashCode(ele);

if (obj[key]) {

deleList.push(ele);

}

else {

obj[key] = ele;

}

}

while (this.length > 0);

for (var key in obj) {

this.push(obj[key]);

}

return deleList;

}

var list = [[3, 1], [1, 2], [1, 3]]

expect([[1, 3]]).to(equal, list.dell(hashCode));

expect([[1, 2], [1, 3]].sort()).to(equal, list.sort());

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for( var i = 0, oNode; oNode = oElement.childNodes[i]; i++ ) {

if( oNode.nodeValue.match(/^\s*extra.*free/g) ) {

//this creates the expression

//it will be cached and re-used next time through the loop

}

}

for( var i = 0, oNode; oNode = oElement.childNodes[i]; i++ ) {

if( oNode.nodeValue.match(new RegExp(“^\s*extra.*free”,”g”)) ) {

//this will always create a new copy of the expression, 

//and is generally much slower than creating static expressions.

}

}

var _table =$("#tableId")

for (var index in json) {

otherFun(_table, json[index]);

};

var logger=window.console && window.console.dir

var logger=window.console || {}

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function f2c(s) {

var test = /(\d+(\.\d*)?)F\b/g;    //Initialize pattern.

return(s.replace

(test,

function($0,$1,$2) { 

return((($1-32) * 5/9) + "C");

}

)

);

}

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• 【杭州】高薪招聘java高级工程师，项目经理，架构师
• 【杭州】高薪招聘控件高级开发工程师（9w-18w年薪）