Javascript Unlocked by Dmitry Sheiko

By Dmitry Sheiko

Improve your code maintainability, functionality, and safeguard via functional professional insights and free up the total strength of JavaScript

About This Book

  • Improve your JavaScript code for higher maintainability and performance
  • Discover easy methods to enforce scalable program structure with JavaScript
  • Learn to exploit JavaScript at the back of the browser, together with its command-line instruments, computer apps, and local cellular apps

Who This booklet Is For

JavaScript Unlocked is for these JS builders who are looking to see simply how some distance they could push their favorite language via useful perception and techniques.

What you'll Learn

  • Make your code readable and expressive by utilizing uncomplicated syntax of JavaScript
  • Grasp latest JavaScript collections similar to arrays and array-like objects
  • Develop summary facts kinds in optimum technique to expand JavaScript right into a extra versatile and robust programming language
  • Examine the professionals and cons of JavaScript through imposing real-time code examples
  • Flourish real-time mini-projects by utilizing JavaScript on server facet to boost computer in addition to cellular applications
  • Work on parallel initiatives with asynchronous JavaScript
  • Improve code maintainability and clarity and strengthen apps functionality via JavaScript

In Detail

JavaScript stands bestride the realm like a colossus. Having conquered net improvement, it now advances into new parts equivalent to server scripting, laptop and cellular improvement, video game scripting, and extra. probably the most crucial languages for any glossy developer, the fully-engaged JavaScript programmer want to know the tips, non-documented gains, quirks, and top practices of this strong, adaptive language.

This all-practical advisor is full of code recipes and keys that will help you free up the whole power of JavaScript. commence through diving correct into the center of JavaScript, with strength consumer recommendations for purchasing greater maintainability and function from the fundamental development blocks of your code. familiarize yourself with modular programming to carry genuine strength to the browser, grasp client-side JavaScript scripting with out jQuery or different frameworks, and observe the entire power of asynchronous coding. Do good things with HTML5 APIs, together with construction your first internet part, take on the basic specifications of writing large-scale functions, and optimize JavaScript's functionality at the back of the browser. Wrap up with in-depth recommendation and top perform for debugging and preserving your JavaScript maintainable for scaling, long term tasks. With each job confirmed in either vintage ES5 JavaScript and subsequent iteration ES6-7 types of the language, even if learn cover-to-cover or dipped into for particular keys and recipes, JavaScript Unlocked is your crucial consultant for pushing JavaScript to its limits.

Style and approach

This practice-oriented cookbook is packed choked with code examples installed the shape: challenge, classical answer, and techniques to optimize web site in either JavaScript ES5 and ES6 language versions. yet this thorough advisor is best-suited to those that prefer to “learn by way of doing” because the subject matters are coated utilizing real-life examples and tutorials.

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Javascript Unlocked

Enhance your code maintainability, functionality, and defense via useful specialist insights and free up the whole power of JavaScriptAbout This BookImprove your JavaScript code for greater maintainability and performanceDiscover tips to enforce scalable software structure with JavaScriptLearn to take advantage of JavaScript at the back of the browser, together with its command-line instruments, machine apps, and local cellular appsWho This ebook Is ForJavaScript Unlocked is for these JS builders who are looking to see simply how a ways they could push their favorite language via sensible perception and strategies.

Extra resources for Javascript Unlocked

Sample text

As you may remember, a module code is executed only once. js Pros and cons CommonJS has a concise and expressive syntax. It's very easy to use. Unit tests are usually written to run in the command line and preferably are a part of continuous integration. js-driven test framework (for example, Mocha) far out of the application context. However, CommonJS implies synchronous loading, which is not suitable in a browser. If we want to bypass this limitation, we have to transpile module sources into a single script that resolves module dependencies internally without loading (see "Traspiling CommonJS for in-browser use").

X. io/packaging-on-the-web/) that describes how archived files (scripts) can be accepted from a URL (hash). So, we will be able to bundle the entire directory with modules into an archive, deploy, and address them in the same way as we do when we have them in a directory. Transpiling CommonJS for in-browser use While HTTP/2 and Packaging on the Web are still on their way, we need fast modular applications. As it was previously mentioned, we can divide the application code into CommonJS modules and transpile them for in-browser use.

Log( instance instanceof Constructor ); // true We can also assign the members to the constructor prototype. log( instance instanceof Constructor ); // true In the first case, we have the object structure within the constructor function body mixed with the construction logic. In the second case by repeating Constructor. prototype, we violate the Do Not Repeat Yourself (DRY) principle. Approach with the private state So how can we do it otherwise? hasOwnProperty( "baz") ); // false instance instanceof Constructor ); // false The advantage of this approach is that any variables declared in the scope of the constructor are in the same closure as the returned object, and therefore, available through the object.

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