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return Class.extend({
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- The jQuery Divide Rebecca Murphey • JSConf.eu • 25.09.2010 @rmurphey • rebeccamurphey.com Wednesday, September 29, 2010
- Wednesday, September 29, 2010
- what this presentation covers how jQuery’s popularity means newcomers learn bad things why I think this is worth talking about at JSConf what I think the larger JavaScript community needs to do about it Wednesday, September 29, 2010
- We need you to help us organize our jQuery-based application. It’s a steaming pile of unmaintainable crap. Wednesday, September 29, 2010
- But we want to keep using jQuery. It’s just so easy! And popular! Wednesday, September 29, 2010
- It’s almost guaranteed that the client will point to jQuery’s popularity as a reason to keep using it. It’s also a pretty fair bet what their code will look like. Wednesday, September 29, 2010
- var toggleHistItems = function (selTabId) { console.log('Selected Tab ID: ' + selTabId); var curEl = $('#' + selTabId); var bSLTabSelected = $('#slhis').is('[class=left selected]'); $('#divNoRecordMsg').hide(); switch (selTabId) { case 'slhis': $('tr[class^=fk]').show(); $('.cPriceRent').html('Foo/Bar'); rentalRateIsVisible(true); $('#historySortButton').show(); //curEl.addClass('left'); if ($('#historySort1').is(':visible')) { if ($('#fooLeaseHistory > tbody > tr[class^=fk]').length === 0) { if (!$('#divAction1').is(':visible') && !$('#divRSAction1').is(':visible')) { $('#divNoRecordMsg').html('There is no history at this time').show(); } $('#historySortButton').hide(); $('#fooLeaseHistory').slideUp(); } else { $('#fooLeaseHistory').slideDown(); } } else { if ($('#listingDisplay > tbody > tr[class^=fk]').length === 0) { if (!$('#divAction1').is(':visible') && !$('#divRSAction1').is(':visible')) { $('#divNoRecordMsg').html('There is no history at this time').show(); } $('#historySortButton').hide(); $('#listingDisplay').slideUp(); } else { $('#listingDisplay').slideDown(); } } break; case 'shis': rentalRateIsVisible(false); $('#historySortButton').show(); Wednesday, September 29, 2010
- Plus that way our database guy can still help us out with the front end. Wednesday, September 29, 2010
- *headdesk* Wednesday, September 29, 2010
- “... it turns out that if you have absolutely no idea what you’re doing in the language you can still generally make things work.” Douglas Crockford, Yahoo! http://developer.yahoo.com/yui/theater/video.php?v=crockonjs-2 Wednesday, September 29, 2010
- the morals of the story perceived popularity & perceived ease of use factor into library choice (duh) people who don’t know JS write non-trivial JS apps whether we like it or not there’s a demand for answers to app org questions the people seeking these answers aren’t necessarily dumb, just untrained in JS Wednesday, September 29, 2010
- jQuery meant we didn’t have to understand this ... Wednesday, September 29, 2010
- var xmlhttp; if (window.XMLHttpRequest) { // code for IE7+, Firefox, Chrome, Opera, Safari xmlhttp=new XMLHttpRequest(); } else { // code for IE6, IE5 xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); } xmlhttp.open("POST","ajax_test.asp",true); xmlhttp.setRequestHeader("Content-type","application/x-www- form-urlencoded"); xmlhttp.send("fname=Henry&lname=Ford"); xmlhttp.onreadystatechange = function() { if (xmlhttp.readyState == 4 && xmlhttp.status == 200) { document.getElementById("myDiv").innerHTML = xmlhttp.responseText; } }; Wednesday, September 29, 2010
- we could just write this ... Wednesday, September 29, 2010
- $.post( 'ajax_test.php', { fname : 'Henry', lname : 'Ford' }, function(resp) { $('#myDiv').html(resp); } ); Wednesday, September 29, 2010
- jQuery offers a really clear answer when we need to build this ... Wednesday, September 29, 2010
- Wednesday, September 29, 2010
- $(document).ready(function() { $('#searchForm').submit(function(e) { e.preventDefault(); var myVal = $(this).find('input:first').val(); $.ajax({ url : 'search.php', data : { term : myVal }, dataType : 'json', success : function(resp) { var tpl = '<li><h2>%title</h2><p>%desc</p></li>'; $('#results').html( $.map(resp.results, function(r) { return tpl.replace('%title', r.title).replace('%desc', r.desc); }).join(''); ); } }); }); }); Wednesday, September 29, 2010
- ... which is why we see this ... Wednesday, September 29, 2010
- Wednesday, September 29, 2010
- Wednesday, September 29, 2010
- But when it comes time to create this ... Wednesday, September 29, 2010
- Wednesday, September 29, 2010
- ... it can be hard for the average jQuery developer to see how they might get from the rst version to the second without creating a whole lot of spaghetti code. Wednesday, September 29, 2010
- It turns out jQuery’s DOM-centric patterns are a fairly terrible way to think about applications. Wednesday, September 29, 2010
- Applications require thinking in terms of loosely coupled, DRYed out units of functionality, designed to work with each other without depending on each other. Wednesday, September 29, 2010
- require.def('views/Results', [], function() { return Class.extend({ itemTemplate : '<li><h2>%title</h2><p>%desc</p></li>', init : function(el) { this.el = el; $.subscribe('/search/results', $.proxy(this, '_showResults')); }, _showResults : function(results) { var tpl = this.itemTemplate, html = $.map(results, function(r) { return tpl .replace('%title', r.title) .replace('%desc', r.desc); }).join(''); this.el.append(html); } }); }); Wednesday, September 29, 2010
- require.def('views/Results', [], function() { return Class.extend({ itemTemplate : '<li><h2>%title</h2><p>%desc</p></li>', init : function(el) { this.el = el; $.subscribe('/search/results', $.proxy(this, '_showResults')); }, _showResults : function(results) { var tpl = this.itemTemplate, html = $.map(results, function(r) { return tpl .replace('%title', r.title) .replace('%desc', r.desc); omg wtf is this??? }).join(''); this.el.append(html); } }); }); Wednesday, September 29, 2010
- We shouldn’t scold; cartoon client man — and the developers lured to JavaScript by jQuery — don’t know what they don’t know. Wednesday, September 29, 2010
- Some people i’ve talked to think we or the market should discourage these people from writing code, but that ship has already sailed. Wednesday, September 29, 2010
- ey’re writing code whether we like it or not, and it’s not good code. Wednesday, September 29, 2010
- is has actual effects on the perception of JavaScript, and on our ability to do interesting things with it. Wednesday, September 29, 2010
- In a nutshell, this is what these developers need to learn: Wednesday, September 29, 2010
- JavaScript jQuery Wednesday, September 29, 2010
- Companies need developers, and if bad ones are all that’s available, they’ll hire them anyway. Wednesday, September 29, 2010
- Wednesday, September 29, 2010
- Aaron Newton from Cloudera wrote a post a while back about how hard it is to nd “badass” JavaScript developers. Wednesday, September 29, 2010
- e productive reaction to a post like that isn’t to feel superior because you’re a badass JavaScript developer. Wednesday, September 29, 2010
- e productive reaction is to gure out how to x it. Wednesday, September 29, 2010
- jQuery’s ease has brought us legions of developers who think of an application like this: disparate pieces with few organizing principles; components that are fun but aren’t made to work together. Wednesday, September 29, 2010
- We need to turn them into developers who think of applications like this. Wednesday, September 29, 2010
- five things to think about Wednesday, September 29, 2010
- #1 popularity contests are stupid Wednesday, September 29, 2010
- Making decisions based on this graph ... Wednesday, September 29, 2010
- Wednesday, September 29, 2010
- ... makes as much sense as making decisions based on this graph ... Wednesday, September 29, 2010
- Wednesday, September 29, 2010
- We have to be intellectually honest when we discuss library pros & cons — and vigorous in correcting those who are not. http://xpandapopx.deviantart.com/art/The-Prideful-Hypocrite-68848153 Wednesday, September 29, 2010
- #2 choose tools, not APIs Wednesday, September 29, 2010
- // YUI3 var parent = Y.Node.create('<div/>'), child = Y.Node.create('<p>foo</p>'); child.on('click', fn); parent.appendChild(child); // Dojo var parent = dojo.create('div'), child = dojo.create('p', { innerHTML : 'foo' }); dojo.connect(child, 'click', fn); dojo.place(child, parent); // jQuery var parent = $('<div/>'); $('<p>foo</p>') .click(fn) .appendTo(parent); Wednesday, September 29, 2010
- $(document).ready(function() { $('#searchForm').submit(function(e) { e.preventDefault(); var myVal = $(this).find('input:first').val(); $.ajax({ url : 'search.php', data : { term : myVal }, dataType : 'json', success : function(resp) { var tpl = '<li><h2>%title</h2><p>%desc</p></li>'; $('#results').html( $.map(resp.results, function(r) { return tpl.replace('%title', r.title).replace('%desc', r.desc); }).join(''); ); } }); }); }); Wednesday, September 29, 2010
- (function(d, $) { d.ready(function() { d.connect('searchForm', 'submit', function(e) { e.preventDefault(); var myVal = $('input', this)[0].value; d.xhrGet({ url : 'search.php', content : { term : myVal }, handleAs : 'json', load : function(resp) { var tpl = '<li><h2>%title</h2><p>%desc</p></li>'; d.byId('results').innerHTML = d.map(resp.results, function(r) { return tpl.replace('%title', r.title).replace('%desc', r.desc); }).join(''); } }) }); }); })(dojo, dojo.query); Wednesday, September 29, 2010
- #3 understanding the problem is key to determining the solution Wednesday, September 29, 2010
- Decision-makers need help to make actual decisions ... and understand their consequences. Wednesday, September 29, 2010
- understand the project application vs. website? team skills: dedicated F2E? team size & turnover? project lifecycle: long-term, evolving product? service-oriented back-end? Wednesday, September 29, 2010
- assess the application’s needs code & le organization? dependency management & build tools? templating & templated widgets? data abstractions & binding? a11y, i18n & l10n? Wednesday, September 29, 2010
- then and only then, choose your tools features that address the application’s needs? active development? active community? documentation & resources? institutional backing? Wednesday, September 29, 2010
- #4 RTFM can’t be our go-to answer Wednesday, September 29, 2010
- “[It’s] a difficult time to learn to be a JavaScript ninja, or even a JavaScript street beggar. Good resources for getting beyond the very basics are hard to nd, documentation is sparse or wrong, and a snippet of code that may have been viable last year is now an anti- pattern.” http://www.clientcide.com/deep-thoughts/why-its-a-good-idea-to-be-a-javascript-developer-and-what-it-takes-to-be-one/#comment-32703 Wednesday, September 29, 2010
- #5 sharing what we know is as important as making new things Wednesday, September 29, 2010
- Wednesday, September 29, 2010
- rebeccamurphey.com • blog.rebeccamurphey.com • @rmurphey anks, in guilt-free alphabetical order, to: Tim Caswell, John Hann, Peter Higgins, Tom Hughes- Croucher, Paul Irish, Brian LeRoux, Roger Raymond, Alex Sexton, Colin Snover, Adam Sontag, Chris Williams, and to everyone who listened to me formulate my thoughts. Wednesday, September 29, 2010
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