Every time you use a selector the elements in Document Object Model (DOM) are searched to match your query or selector. Doing this kind of works too often or repeatedly will decrease the performance of your web page. If you refer to a specific selector too often or repeatedly you should consider to add it…

Posted in jQuery

What are jQuery selectors and how to cache jQuery selectors to improve performance of your web page

JSON File JSON, i.e., JavaScript Object Notation is a lightweight format for interchanging data. It is based on a subset of JavaScript language. For example, this JSON data format is used in the webservice response. In old days webservices used XML for the primary data format but nowadays JSON, being lightweight, is becoming the preferred…

Posted in Angular

How To Load Local JSON File In Angular Application

Introduction In this tutorial I am going to explain you how to use docker compose to dockerize your Nodejs MySQL REST API for CRUD operations. I am not going to tell you here how to build the REST CRUD application but you can always go back and check the detail tutorial on this here. I…

Posted in Docker MySQL NodeJS REST

Docker Compose – Dockerizing Nodejs MySQL REST API CRUD Example

Here I am going to show you how to create REST API CRUD example using Nodejs Express and MySQL server. CRUD means Create, Read, Update and Delete operations which are performed through REST (Representational State Transfer) resources that works on http/https protocol. REST resources or APIs work on verbs, such as, GET, POST, PUT, DELETE,…

Posted in MySQL NodeJS

NodeJS Express MySQL REST API CRUD Example

Introduction In this example I am going to show you how to allow only numeric values or digits in input field using React JS. You may have a requirement where you only need to allow user digits or numeric values for the input field. If user inputs non-numeric values then either you show an error…

Posted in React JS

Allow only numeric values or digits in input field using React

In this tutorial I am going to show you how to allow users only input numeric values or digits. If users enter non-numeric value then we will show an error message. We can also completely prevent from entering non-numeric values. In this case, we need to accept only numbers for a textbox or input field…

Posted in Angular

Allow only numeric values or digits in input field using Angular 10

Introduction I am going to show you how to show auto complete suggestion when users search for something by typing in the input field. Autocomplete allows users to have other suggested strings or values displayed on typing of the relevant text in the input field. You have also seen when you start a search on…

Posted in React JS

Autocomplete input using React

Introduction I am going to show you how to give auto complete suggesstion when users search for something by typing in the input field. Autocomplete allows users to have other suggested strings or values displayed on typing of the relevant text in the input field. You have also seen when you start a search on…

Posted in Angular

Autocomplete input using Angular 9

This is an example where I am going to show you how to write random elements to div having class names from array using JavaScript. Let’s consider we have multiple div tags on a web page and these div tags are created dynamically based on certain condition but you are not sure how many div…

Posted in JavaScript

Write random elements to div having class names from array using JavaScript

Introduction In this tutorial we are going to show you how to consume GraphQL CRUD API using React and Apollo. CRUD means Create, Read, Update and Delete operations. Therefore we are going to create client application for GraphQL server. I am going to use Spring Boot framework for implementing GraphQL server. In the server side…

Posted in GraphQL React JS

How to consume GraphQL CRUD API using React and Apollo

Introduction In this tutorial we will see how to create or add routes to existing Angular project. The situation may arise when you forget to add routes while creating new project or probably you thought that routes may not be required but later you find that routes are required for appropriate navigation in your application….

Posted in Angular

How to add routes to existing Angular project

Here we are going to see how to consume GraphQL CRUD API using Angular and Apollo. So this is a client for GraphQL Server API. We are going to use various modules for working with GraphQl client. For GraphQL server side implementation you can use any technology and here I am going to use Spring…

Posted in Angular GraphQL

How to consume GraphQL CRUD API using Angular 9 and Apollo