We can set the value of a select box using Javascript using the following. Suppose we have the following select box −    Select    Apple    Strawberry    Cherry    Guava To set the value of this select element, we need to access it using querySelector. Then set the ... Read More

Object-oriented programming languages allow data hiding using private fields. They use these to hide the internals of classes. In JS there is no such in build support to hide/encapsulate the inner workings.We have Anonymous functions that can give you encapsulation in JS. Let us look at an example −Exampleconst HIDDEN_CONST ... Read More

Ajax is a set of web development techniques using many web technologies on the client-side to create asynchronous web applications. With Ajax, web applications can send and retrieve data from a server asynchronously without interfering with the display and behavior of the existing page.Any other technology Ajax also has its ... Read More

You can use lodash's set method to set properties at any level safely. Setting first-level properties are pretty straightforward. Nested property access is tricky and you should use a tested library like lodash for it.You can set a deeply nested object in the following way −Examplelet _ = require("lodash"); let ... Read More

You can use lodash's get method to get properties at any level safely. Getting first-level properties is pretty straightforward. Nested property access is tricky and you should use a tested library like lodash for it.You can access a deeply nested object in the following way −Examplelet _ = require("lodash"); let ... Read More

You can use lodash's get method to get properties at any level safely. Getting first-level properties is pretty straightforward. Nested property access is tricky and you should use a tested library like lodash for it.You can access a deeply nested object in the following way −Examplelet _ = require("lodash"); let ... Read More

JavaScript can send network requests to the server and load JSON. JS does this using something called AJAX. AJAX stands for Asynchronous JavaScript and XML. JS has an API, fetch, to GET(receive) and POST(send) information to the server.You can use fetch to GET JSON data in the following way −Exampleconst ... Read More

The query string is made up of query parameters and used to send data to the server. This part of the URL is optional. It needs to be constructed by the developer. This can be done using a native method called encodeURIComponent.The encodeURIComponent() function encodes a Uniform Resource Identifier (URI) ... Read More

lodash and underscore are both utility libraries that make JavaScript easier by providing utils that make working with arrays, numbers, objects, strings, etc. much easier. These libraries are great for −Iterating arrays, objects, & stringsManipulating & testing valuesCreating composite functionsThey are both functional libraries. Lo-Dash is a fork of Underscore, ... Read More

Backbone is an MV* framework while jQuery is a DOM toolkit.With Backbone, you represent data as Models, which can be created, validated, destroyed, and saved to the server. Whenever a UI action causes an attribute of a model to change, the model triggers a "change" event; all the Views that ... Read More