By Alex MacCaw
Construction wealthy JavaScript purposes that deliver a laptop adventure to the internet calls for relocating country from the server to the customer side—not an easy activity. This hands-on booklet takes knowledgeable JavaScript builders via all of the steps essential to create cutting-edge functions, together with constitution, templating, frameworks, speaking with the server, and lots of different concerns.
Throughout the booklet, you'll paintings with real-world instance purposes that can assist you seize the techniques concerned. how one can create JavaScript purposes that supply a extra responsive and stronger experience.
* Use the Model-View-Controller (MVC) trend, and how you can deal with dependencies inside of your program
* Get an advent to templating and information binding
* know about loading distant information, Ajax, and cross-domain requests
* Create realtime purposes with WebSockets and Node.js
* settle for dropped documents and add info with development symptoms
* Use significant frameworks and libraries, together with jQuery, backbone, and resolution
* Write exams and use the console to debug your purposes
* Get deployment top practices, similar to caching and minification
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Extra resources for JavaScript Web Applications
Sample text
Click(function(){ /* ... delegate("li", "click", /* ... */); 24 | Chapter 2: Events and Observing Another advantage to event delegation is that any children added dynamically to the element would still have the event listener. So, in the above example, any li elements added to the list after the page loaded would still invoke the click handler. Custom Events Beyond events that are native to the browser, you can trigger and bind them to your own custom events. Indeed, it’s a great way of architecting libraries—a pattern a lot of jQuery plug-ins use.
Never define a variable without using the var operator, since it always creates a global variable. foo = foo; })(window); assertEqual(foo, "bar"); Class Libraries As with a lot of concepts in this book, it’s good to understand the theory behind classes, but often in practice, you’ll use a library. jQuery doesn’t include class support natively, but it can easily be added with a plug-in like HJS. create(Person, { price: function() { /* ... find = function(id){ /* ... equal(bill) ); HJS isn’t your only option; Spine also has a class implementation.
For example: var clicky = { wasClicked: function(){ /* ... apply(thisObject, arguments); }); }; var clicky = { wasClicked: function(){ /* ... wasClicked, this)); } }; So, in the above example, we specify the context to be used inside the click callback; the context jQuery invokes the function in is ignored. proxy(function(){ /* ... */ }, this)); There are other useful reasons to use apply() and call(), such as delegating. apply(console, args); }; Function Invocation | 13 Above, we’re making an array of arguments and then adding our own.