Download JavaScript Patterns by Stoyan Stefanov PDF

By Stoyan Stefanov

What's the simplest method for constructing an software with JavaScript? This ebook is helping you resolution that question with a number of JavaScript coding styles and top practices. If you're an skilled developer seeking to resolve difficulties regarding gadgets, features, inheritance, and different language-specific different types, the abstractions and code templates during this consultant are ideal—whether you're utilizing JavaScript to put in writing a client-side, server-side, or laptop application.

Written via JavaScript specialist Stoyan Stefanov—Senior Yahoo! Technical and architect of YSlow 2.0, the net web page functionality optimization tool—JavaScript Patterns contains useful recommendation for enforcing each one trend mentioned, in addition to a number of hands-on examples. You'll additionally find out about anti-patterns: universal programming methods that reason extra difficulties than they solve.

• discover precious behavior for writing top quality JavaScript code, equivalent to warding off globals, utilizing unmarried var declarations, and more
• research why literal notation styles are easier possible choices to functions
• realize other ways to outline a functionality in JavaScript
• Create items that transcend the fundamental styles of utilizing item literals and functions
• study the choices on hand for code reuse and inheritance in JavaScript
• learn pattern JavaScript ways to universal layout styles akin to Singleton, manufacturing unit, Decorator, and more
• research styles that practice particularly to the client-side browser atmosphere

Show description

By Stoyan Stefanov

What's the simplest method for constructing an software with JavaScript? This ebook is helping you resolution that question with a number of JavaScript coding styles and top practices. If you're an skilled developer seeking to resolve difficulties regarding gadgets, features, inheritance, and different language-specific different types, the abstractions and code templates during this consultant are ideal—whether you're utilizing JavaScript to put in writing a client-side, server-side, or laptop application.

Written via JavaScript specialist Stoyan Stefanov—Senior Yahoo! Technical and architect of YSlow 2.0, the net web page functionality optimization tool—JavaScript Patterns contains useful recommendation for enforcing each one trend mentioned, in addition to a number of hands-on examples. You'll additionally find out about anti-patterns: universal programming methods that reason extra difficulties than they solve.

• discover precious behavior for writing top quality JavaScript code, equivalent to warding off globals, utilizing unmarried var declarations, and more
• research why literal notation styles are easier possible choices to functions
• realize other ways to outline a functionality in JavaScript
• Create items that transcend the fundamental styles of utilizing item literals and functions
• study the choices on hand for code reuse and inheritance in JavaScript
• learn pattern JavaScript ways to universal layout styles akin to Singleton, manufacturing unit, Decorator, and more
• research styles that practice particularly to the client-side browser atmosphere

Show description

Read or Download JavaScript Patterns PDF

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Additional info for JavaScript Patterns

Example text

The feature in question is that the Object() constructor accepts a parameter and, depending on the value passed, it may decide to delegate the object creation to another built-in constructor and return a different object than you expect. constructor === Boolean); // true This behavior of the Object() constructor can lead to unexpected results when the value you pass to it is dynamic and not known until runtime. Again, in conclusion, don’t use new Object(); use the simpler and reliable object literal instead.

The single var pattern looks like this: function func() { var a = 1, b = 2, sum = a + b, myobject = {}, i, j; // function body... } You use one var statement and declare multiple variables delimited by commas. It’s a good practice to also initialize the variable with an initial value at the time you declare it. This can prevent logical errors (all uninitialized and declared variables are initialized with the value undefined) and also improve the code readability. When you look at the code later, you can get an idea about the intended use of a variable based on its initial value—for example, was it supposed to be an object or an integer?

_getLast(); }, _getFirst: function () { // ... }, _getLast: function () { // ... } }; In this example getName() is meant to be a public method, part of the stable API, whereas _getFirst() and _getLast() are meant to be private. They are still normal public methods, but using the underscore prefix warns the users of the person object that these methods are not guaranteed to work in the next release and shouldn’t be used directly. Note that JSLint will complain about the underscore prefixes, unless you set the option nomen: false.

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