Angular 9 Tutorial For Beginners #27 - Custom Pipes

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Install bootstrap angular tutorial, Learn how to install Bootstrap in Angular 9 app. In this course you will learn how to create small, medium, large applications with Angular 9 in this development tutorial.

Part 1: Angular Introduction and Version History

Part 2: How to upgrade to Angular Version 9

Part 3: How to Install Angular CLI and Run Angular Application

Part 4: How to Install Bootstrap Framework in Angular 9 application

Part 5: Understanding Angular Folder Structure and Boot Process

Part 7: Angular CLI - Complete Guide

Part 8: Angular Modules

Part 9: Angular Decorators

Part 10: Angular Components

Part 11: Angular Directives

Part 12: Angular NgIf

Part 13: Angular NgSwitch

Part 14: Angular NgFor

Part 15: Angular NgStyle

Part 16: Angular NgClass

Part 17: Angular Data Binding

Part 18: Angular Interpolation

Part 19: Angular Property Binding

Part 20: Angular Attribute Binding

Part 21: Angular Event Binding

Part 22: Angular Two Way Data Binding

Part 23: Angular Pipes

[sreenuksr]

Angular 9 Tutorial For Beginners #27 - Custom Pipes

- We can generate custom pipe using CLI -> ng generate pipe <pipe name>
- Pipes need to be added, but when we generate it will automatically added to module
- We need to import the Pipe and PipeTransform from the @angular/core
- Pipes are declared with the decorator @Pipe and provide the selector name

Example #1:

app.component.html



highligh.pipe.ts

transform(value: string, cityname :string): string {

return "City Name Is - "+ cityname;
}

Example #2:

highligt.pipe.ts



export class HighlightPipe implements PipeTransform {
constructor (private sanitizor:DomSanitizer){};

transform(value: string, cityname :string): any {

return
}

}

[alex]

I found one of most easiest way to learn angular via this videos, keep up good work, it really helps

[murtazamohammadi]

I bought a course on Udemy and followed this course but I did not learned anything. To be honest, I learned angular here. thanks for your effort and thanks for sharing your knowledge with us.

[sravaninuthi]

Sir, I heard about pure pipe and impure pipe could you tell me about this sir.

[europe_life]

Hi Shridhar Thank you for great i just wanted to tell that in this video you didn't explain about transform so i got I understand the concept but though to mention about it

[manjusha]

Hello Sir, what does first parameter value denote, is it needed to be passed allwaz and on what basis its data type is decided?

[dhavaldokhe]

Im begineer of angular which series i should watch?

[rajeshwarans]

Thank you very much for your great explanations

[RajRaj-djsn]

How to use the first parameter in transform method ie. 'value' ? What is the use of it ??

[raghuvardhansaripalli]

Hi Sridhar, Namastey. Your explanation is simply simply superb with very good explanation and clear cut vocabulary and voice. All your videos has a zeal to get the subject understand for the learners. Others will prepare videos just to put up a SHOW that they only know the subject and keep on going to explain the subject like a BULLET TRAIN. And they never think whether the learners are understanding the subject.

I will follow the upcoming videos as well. By the way, if you know GRAPHQL + ANGULAR + SPRING BOOT, could you please develop some videos on this stack.

Thank you so much, God bless you..:)

[rpiisenh]

Can u make video on angular resource caching using browser cache storage

[yash_jivrajani]

DOMException: Failed to execute 'setAttribute' on 'Element': '{' is not a valid attribute name.

on <div {{ user.city }}></div>

[naushadali]

hello sir in custom pipe what is the role of domsenetizer and related terms used in this

[kiranmoulimouli]

Hii sir Iam following ur tutorials without missing any one I understanded evry class but in custom pipes u imported domsanitizer and returedbypass... Something like that plz explain that Sir I don't even understand wat ur doning being a beginner how can I understand that domsanitizer plz explain it sir

[mp-fgzw]

Thanks Sridhar for the video. One question I have, Do we require to use 'city' parameter in the transform function of pipe class? It worked for me with only one parameter. "transform(value:string){ return value;}". Request you to suggest me on this.

[rangarajumanthena]

Can you please give a small example how to use variable binding in custom pipeline

[ChandeckTv]

good evening sir sridhar, ,i wasnt able to crack the phone number format can you shed more light please

[kartikeykamal]

its important !!! how to Create custom pipe to show date in specific format in angular

[hashirahmed]

Dear Sir what if we use table and want to highlight a specfic table row, how will we do it. Please provide code if possible

[kratibakshi]

sir i'm trying to bind click event on button click, but not getting output. PL help and also give the solution for it "How to bind click event on button inside custom pipe on".

Snippet code :(customPipe.ts file code)

export class CustomPipe implements PipeTransform {
constructor( private sanitizer: DomSanitizer) {}
transform(value: any, ...args: any[]): any {
return + '...' + '<button class="btn btn-primary" onclick="read()">read more</button>');
}

read() {
console.log('clicked');
}
}

PL replay as soon as possible. I'm stuck