Angular2+ Life Cycle Hooks with Details Understanding and example

Hey Guys, in this blog we are going to learn about Life Cycle of Angular 2+.

Let's get started...

There is total 8 life-cycle hooks Angular 2+ have

1) ngOnChanges:

- It's called after a bounded input property changes

2) ngOnInit:

- This hook is going to call when an angular component is going to be initialized.

- this hook called only once

3) ngDoCheck:

- This Hook is called during every changed detection in component.

4) ngAfterContentInit :

- This hook is called after content ( ng-content ) has been projected into the view.

5) ngAfterContentChecked:

- This hook is called every time when the projected content has been checked.

6) ngAfterViewInit:

- This hook is called after the component's view or ( child View ) has been initialize.

7) ngAfterViewChecked:

- This hook is called every time when the view or (Child View ) has been checked.

8) ngOnDestroy:

- This hook is called when the component is about to be destroyed.
- It's called only once time

If you guys have any query then you can drop a mail to us on this mail id:

techoswag@gmail.com

Comments

Different between ``===`` and ``==`` operators in JavaScript

Hello Guys, In this blog we are going to learn about "===" and "==" different with details understanding and examples. JavaScript operators that you might have stumbled upon as a developer include "===", "==". JavaScript's "==" operator is commonly utilized for loose comparison purposes. It functions by converting both of the values to a common type and then comparing them for equality. Here's an example: The comparison operator "==" transforms the value of "17" from a string to a number before determining if the values match. Consequently, if both versions of the data share the same properties and values, the comparison is marked as valid and returns true. The results of the "==" operator can occasionally be surprising, including: The comparison returns true when the "==" operator converts the empty string to the number 0 and compares it to the number 0. This can result in bugs, so ...

What is the Lazy-loading in Angular and Different between Old syntax and New Syntax of Lazy-loading with examples

Hey Guys, In this blog we are going to learn about How we can use Lazy-loading in angular with examples. We are also going to learn the different syntax of lazy loading in angular . Lazy loading is used to load the specified module once the routes match. It will load the modules once use access that particular section or modules in our application. Using lazy loading will improve the performance of our application and also decrease the load time of our application. Using lazy-loading will help to reduce the bundle size of the application. Lazy -loading Old syntax in angular 7 or lower version { path: "feature", loadChildren:'./feature-module/feature-module.module#FeatureModuleModule' }, Lazy -loading new syntax in angular 8+ { path:'feature', loadChildren:() => import...

How to use Java-Script Let & Const Overview ( ES 6 ) with examples

Hey Guys, in this blog we are going to learn about What is the different between LET and CONST key word ( ES 6) with examples Let's get started... LET: Let key word now we are using for declaring variables . It's not like a surprise because it's come with improvement of VAR keywords. In Let , we can declare variables like we are declaring using the VAR keyword but in LET keyword we cannot re-declare that variables like below. but we can change the value of variable like beow CONST: In CONST keyword we are using when we have static value. Let assume you have one value that not going to change anywhere in the function of the file in that case we can use CONST Keywords. we can not re-declare const variable and we can not update const keyword value like below. but we can use it like below. If you guys have any query then you can drop a mail to us on this mail id: t...

TechoSwag

Search This Blog