Javascript Libraries Courses Online

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Javascript Libraries Training


Know Mutation Summary

About

What is this?

Mutation Summary is a JavaScript library that makes observing changes to the DOM fast, easy and safe. It's built on top of (and requires) a new browser API called DOM Mutation Observers.

  • Browsers which currently implement DOM Mutation Observers.
  • DOM Mutation Observers API and its relationship to this library and (the deprecated) DOM Mutation Events.

Why do I need it?

Mutation Summary does five main things for you:

  • It tells you how the document is different now from how it was. As its name suggests, it summarizes whats happened. Its as if it takes a picture of the document when you first create it, and then again after each time it calls you back. When things have changed, it calls you with a concise description of exactly whats different now from the last picture it took for you.
  • It handles any and all changes, no matter how complex. All kinds of things can happen to the DOM: values can change and but put back to what they were, large parts can be pulled out, changed, rearranged, put back. Mutation Summary can take any crazy thing you throw at it. Go ahead, tear the document to shreds, Mutation Summary wont even blink.
  • It lets you express what kinds of things youre interested in. It presents a query API that lets you tell it exactly what kinds of changes youre interested in. This includes support for simple CSS-like selector descriptions of elements you care about.
  • Its fast. The time and memory it takes is dependant on number of changes that occurred (which typically involves only a few nodes) -- not the size of your document (which is commonly thousands of nodes).
  • It can automatically ignore changes you make during your callback. Mutation Summary is going to call you back when changes have occurred. If you need to react to those changes by making more changes -- wont you hear about those changes the next time it calls you back? Not unless you ask for that. By default, it stops watching the document immediately before it calls you back and resumes watching as soon as your callback finishes.

    What is it useful for?

    Lots of things, here are some examples:

  • Browser extensions. Want to make a browser extension that creates a link to your mapping application whenever an address appears in a page? you'll need to know when those addresses appear (and disappear).
  • Implement missing HTML capabilities. Think building web apps is too darn hard and you know whats missing from HTML that would make it a snap? Writing the code for the desired behavior is only half the battle--you'll also need to know when those elements and attributes show up and what happens to them. In fact, theres already two widely used classes of libraries which do exactly this, but dont currently have a good way to observe changes to the DOM.
    • UI Widget libraries, e.g. Dojo Widgets
    • Templating and/or Databinding libraries, e.g. Angular or KnockoutJS
  • Text Editors. HTML Text editors often want to observe whats being input and fix it up so that they can maintain a consistent WYSWIG UI.

    What is this not useful for?

    The intent here isn't to be all things to all use-cases. Mutation Summary is not meant to:

  • Use the DOM as some sort of state-transition machine. It won't report transient states that the DOM moved through. It will only tell you what the difference is between the previous state and the present one.
  • Observing complex selectors. It offers support for a simple subset of CSS selectors. Want to observe all elements that match div[foo] span.bar > p:first-child? Unfortunately, efficiently computing that is much harder and currently outside the scope of this library. Note that both of the above use cases are possible given the data that the underlying Mutation Observers API provides -- we simply judged them to be outside the "80% use case" that we targeted with this particular library.

    Where can Mutation Summary be used?

    The Mutation Summary library depends on the presence of the Mutation Observer DOM API. Mutation Observers are available in

    • Google Chrome
    • Firefox
    • Safari
    • Opera
    • IE11 Mutation Observers is the work of the W3C WebApps working group. In the future it will be implemented in other browsers (well keep the above list of supporting browsers as up-to-date as possible).

      Great. I want to get started. Whats next?

  • Check out the tutorial and the API reference.

    Google groups discussion list.


7 hours

$1,990

Learn JsPsych

About

jsPsych is a JavaScript library for creating behavioral experiments that run in a web browser. jsPsych provides a framework for defining experiments using a set of flexible plugins that create different kinds of tasks a subject could complete during an experiment. By assembling these different plugins together it is possible to create many different types of experiments.


7 hours

$1,990

Discover Tap

About

TAP.JS

Tap is a Javascript library for easy unified handling of user interactions such as mouse, touch and pointer events.

  • No need to detect what kind of events are supported, Tap handles this for you
  • Small distribution size of 1Kb
  • Use fastest event types supported (majority of browsers has ~300ms delay between touch/pointer events and click). Every millisecond does really matter!

7 hours

$1,990

Explore xajax PHP and Javascript library

About

xajax is an open source PHP and Javascript library that allows you to easily create powerful Ajax enabled web applications using PHP, HTML, CSS and Javascript. Update web page content asynchronously with simple Javascript calls to access your PHP cod


7 hours

$1,990

Basics of Concurrent Thread

About

Concurrent.Thread is a JavaScript library providing user-level (virtual) thread. It does not modify any Web browsers and consists of 100% pure JavaScript. You can write multithreaded programs for your favorite browsers without any extensions.


7 hours

$1,990

Know Rico Rich Ajax Framework

About

Rico is a JavaScript library for creating rich internet applications. Version 1 is JavaScript only. Versions 2 & 3 include server-side code (asp, asp.net, and php) to make creating web apps even easier. Versions 1 & 2 are based on Prototype and include grids, calendar & tree controls, drag & drop, and cinematic effects. Version 3 goes beyond Prototype, and includes support for jQuery, MooTools, Dojo, Ext, and BBC Glow libraries. Version 3 is only available in the SVN repository. The rico3.net branch includes a .net server control.


7 hours

$1,990

Know UltraMinifier

About

Javascript and CSS minifier

Ultra Minifier is the most simple YUI Compressor GUI to minify Javascript and CSS code without using the Terminal.


7 hours

$1,990

Work around with js graph it

About

js-graph-it is a JavaScript library that allows to represent graphs in html pages by linking blocks with connectors. Common html elements become blocks and connectors by using particular css classes, in a declarative fashion. Drag and drop is provided


7 hours

$1,990

Know HMGScript

About

HMGScript is a JavaScript library. The goal of the project is to allow developers the creation of web applications using the same logic as desktop applications via simple objects. For data manipulation, it allows the use of MySql databases and dbf (xBase) files.


7 hours

$1,990

Know xQuiD

About

xQuiD is a RIA framework formed by two complementary projects: A JavaScript framework to build RIA easier, and a free WYSIWYG Eclipse Plugin wich can be used to improve your productivy.


7 hours

$1,990

Fundamentals of SliderWindow YUI javascript widget

About

Widget based on Yahoo YUI javascript library. Send messages to the user of a webapplication. A window slides open at the side of the window. It saves screen space, can be controlled programmatically and by the user with clicks and keyboard shortcuts.


7 hours

$1,990


Is learning Javascript Libraries hard?


In the field of Javascript Libraries learning from a live instructor-led and hand-on training courses would make a big difference as compared with watching a video learning materials. Participants must maintain focus and interact with the trainer for questions and concerns. In Qwikcourse, trainers and participants uses DaDesktop , a cloud desktop environment designed for instructors and students who wish to carry out interactive, hands-on training from distant physical locations.


Is Javascript Libraries a good field?


For now, there are tremendous work opportunities for various IT fields. Most of the courses in Javascript Libraries is a great source of IT learning with hands-on training and experience which could be a great contribution to your portfolio.



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