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Angular Cheat Sheet

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Cheat Sheet Bootstrapping import {  platformBrowserDynamic  } from '@angular/platform-browser-dynamic'; platformBrowserDynamic ().bootstrapModule (AppModule); Bootstraps the app, using the root component from the specified  NgModule . NgModules import {  NgModule  } from '@angular/core'; @ NgModule ({ declarations: ..., imports: ..., exports: ..., providers: ..., bootstrap: ...}) class MyModule {} Defines a module that contains components, directives, pipes, and providers. declarations:  [MyRedComponent, MyBlueComponent, MyDatePipe] List of components, directives, and pipes that belong to this module. imports:  [ BrowserModule , SomeOtherModule] List of modules to import into this module. Everything from the imported modules is available to  declarations  of this module. exports:  [MyRedComponent, MyDatePipe] List of components, directives, and pipes visible to modules that import this module. provide...
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Extremely Useful Hacks for JavaScript

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In this post I will share  12 extremely useful hacks for JavaScript . These hacks reduce the code and will help you to run optimized code. So let’s start hacking! 1) Converting to boolean using  !!  operator Sometimes we need to check if some variable exists or if it has a valid value, to consider them as  true value . For do this kind of validation, you can use the  !! (Double negation operator)  a simple  !!variable , which will automatically convert any kind of data to boolean and this variable will return  false  only if it has some of these values:  0 ,  null ,  "" ,  undefined  or  NaN , otherwise it will return  true . To understand it in practice, take a look this simple example: function Account ( cash ) { this .cash = cash; this .hasMoney = !!cash; } var account = new Account( 100.50 ); console .log(account.cash); // 100.50 console .log(account.hasMoney); // true ...
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How to Secure Session Management in Node

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In a web application, data is transferred from a browser to a server over HTTP. In modern applications, we use the HTTPS protocol, which is HTTP over TLS/SSL (secure connection), to transfer data securely. Looking at common use cases, we often encounter situations where we need to retain user state and information. However, HTTP is a stateless protocol. Sessions are used to store user information between HTTP requests. We can use sessions to store users' settings like when not authenticated. Post authentication sessions are used to identify authenticated users. Sessions fulfill an important role between user authentication and authorization. Exploring Sessions Traditionally, sessions are identifiers sent from the server and stored on the client-side. On the next request, the client sends the session token to the server. Using the identifier, the server can associate a request with a user. Session identifiers can be stored in cookies, localStorage, and sessionStorage. Session identi...
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Angular 9 - User Registration and Login Example & Tutorial

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In this tutorial we'll go through an example of how to build a simple user registration, login and user management (CRUD) application with Angular 9. The project is available on GitHub at  https://github.com/cornflourblue/angular-9-registration-login-example . The Angular CLI was used to generate the base project structure with the  ng new <project name>  command, the CLI is also used to build and serve the application. For more info about the Angular CLI see  https://angular.io/cli . Styling of the example app is all done with Bootstrap 4.4 CSS, for more info about Bootstrap see  https://getbootstrap.com/docs/4.4/getting-started/introduction/ . Here it is in action:   (See on StackBlitz at  https://stackblitz.com/edit/angular-9-registration-login-example ) Running the Angular 9 Login Tutorial Example Locally Install NodeJS and NPM from  https://nodejs.org . Download or clone the Angular project source code from  https:...
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How to download a file using command prompt (cmd) Windows?

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If you’re like most Internet users, you download various types of files now and then. You either download these files with your web browser or some download manager software. Have you ever considered downloading files using the command prompt i.e. CMD? If not, we recommend you to try it. It’s quite interesting apart from being very useful as well. In this article, we’ll show you how to download a file using command prompt aka CMD. How to download a file using command prompt?   There are several useful commands for the Command Prompt and one of them is  bitsadmin . Though bitsadmin has several uses, here we shall limit this article to its role in downloading files only. If you want to read the details about bitsadmin syntax, continue reading this section. Otherwise, you can scroll down to the next section –  Downloading a file .   The syntax of bitsadmin is : BITSADMIN [/RAWRETURN] [/WRAP | /NOWRAP] command   As you know, the parts of the syntax inside ...
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