Describe Client Data Storage Methods in Javascript - 1100 Words

Describe Client Data Storage Methods in Javascript (Essay Sample) Content: JavaScriptNameInstitutionJavascriptClient Data Storage Methods in JavascriptVarious APIs provide storage to clients. These include local and session storage, Web SQL Database, File Access and Indexed Database. Web Storage helps clients to set values by use of localStorage.foo = bar  and retrieve them later even when a browser closes and then reopens as LocalStorage.foo. Session storage similarly sets values and retrieves them through browser closure inhibits retrieval. Web SQL Database is a functionally complex database that has key-pair values with the ability to index fields from the entered values. Web SQL Database enables faster searching and good performance since it is asynchronous.The Notion of Front-end languages vs. backside languagesFront-end languages are programming languages used by web developers to create the part of a website that is directly viewed by the user, for example, the fonts used, colors, etc. The front-end part of a website allows the use r to interact with the created site. Examples of front-end languages are HTML, JavaScript, and CSS. Backside languages, on the other hand, are programming languages used by web developers to manipulate the code and power components that enable the front-end side of the website to exist. This involves interrelating the server, databases, and applications. Examples of backside languages are ASP and Python.DOM NodesDocument Object Model (DOM) is a language convention that represents and interacts with various objects. Examples of these node types are Document, Entity Reference, Document Type, and Document Fragment. Document node represents the whole document. While the Entity Reference node represents the reference that describes the entity. Document type node offers an interface to the entities distinct in the document. Document Fragment node accounts for a document object that can contain a ration of the whole document.DOM Navigation MethodsSeveral methods are relevant during DOM nav igation in Javascript. These include the create Element, remove Child, create Text Node, append Child and find Methods. The create Text Node method helps permit the text content and returns a value that denotes the text node. The append Child method helps insert a new child to the first child. The create Element method helps create a new node or element to the already existing elements. The remove Child method removes a particular node from an object tree. The append Child method makes a certain element a new child to the second element. The find method helps identify the descendants of an element in a group of matched elements.Array MethodsThe Array Methods play a huge role in the implementation of Javascript arrays. These matrix methods include popping, pushing, shifting elements, etc. Pop () method plays the role of removing the last element present in an array and leaves behind the other elements in the array. Push () method helps add a new feature to an existing array. The shif t () method helps in removing the first element of the array and repositions all the other elements in one place.JSON NotionJSON refers to Javascript Object Notation. It is the lightweight format required for data interchanging. JSON is easy for technologies to parse and produce (Burleton, 2015). JSON is a language specific text format that uses conventions such as C. Python and Java. It comprises of an object, an array, a scalar variable and literal values. The use of Java convention and C. Python convention makes JSON an ultimate data-conversion language.Benefits of JSONJSON has various advantages. Firstly, it has a faster processing speed when compared to other data-interchange formats such as XML. Secondly, it is readily usable since Javascript recognizes it. Also, JSON allows integration and interchange of binary data on the net with appropriate text representation.Reserved Words UsageReserved words are unique words that define various variables, methods, functions, and identif iers. Examples of these reserved words are catch, case, const, return, void, and throw among others.Restriction of Reserved WordsThe use of Reserved Words is discouraged because of the following reasons. Firstly, new users encounter difficulty when it comes to memorizing reserved words. Secondly, language extension may be difficult since new features may cause invalidation of the existing programs. Ultimately, porting programs may be difficult since one reserved word used on one computer might be absent in another.Get around in Reserved Words UsageVariables at times affect objects in a way that confuses programmers forcing them to use modified versions of the variables. For example, the programmer may choose to modify variable speed to a modified version spd to get rid of the confusion.Javascript Functions * Benefits of FunctionsFunctions make program handling easier because of several reasons. Firstly, they reduce the length of a program when used at appropriate sections of the pro gram. Secondly, they make it simpler to identify other faulty functions for corrections. Also, functions that get created for a particular program are usable by other programs. * The Anatom...