Hide elements using Typescript

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I'm new to Typescript and Angular Material. I want to hide elements inside elements like this.

<div id="abc">
   <div id="123">
      <p>Hello!</p>
   </div>
      <p>World</p>
</div>
<div id="def">
    <p>Hello World</p>
</div>

I want to hide div block(id:123).I tried in this way.

var formElement = <HTMLFormElement>document.getElementById('123');
formElement.style.display='block';

It gets an error saying Cannot read property 'style' of null.... How can I solve this problem.

This is not the way to hide elements in Angular. Bind your element's style attribute to a boolean, like this:

<form [style.display]="isVisible ? 'block' : 'none'">... contents</form>

And in your component class:

this.isVisible = false; // whenever you need to hide an element

Or you can use *ngIf:

<form *ngIf="isVisible">... contents</form>

Please, note that *ngIf removes the node and its children completely from the DOM tree completely if the conditions turns to false, and fully recreates them from scratch when the condition turns true.

How to Show Hide or Toggle Elements in Angular 4, In my example here, I am using the *ngIf directive in Angular 4 to toggle or show and hide elements. The Angular 4 ngIf will add or remove an elements from the� Spread the love Related Posts Useful JavaScript Tips — Checking Strings and Styling ElementsLike any kind of apps, JavaScript apps also have to be written well. Otherwise, we… JavaScript Best Practices for Writing More Robust Code — Doing ChecksJavaScript is an easy to learn programming language. It’s easy to write programs that run… JavaScript Best Practices for Writing More […]

You can access the dom element using ViewChild with #localvariable as shown here,

import {Component, NgModule,ViewChild,ElementRef} from '@angular/core'
import {BrowserModule} from '@angular/platform-browser'

@Component({
  selector: 'my-app',
  template: `
   <div id="abc">
   <div #id id="123">
      <p>Hide!</p>
   </div>
      <p>World</p>
</div>
<div id="def">
    <p>Hello World</p>
</div>
  `,
})
export class App {
  name:string;

@ViewChild('id') el:ElementRef;
  constructor() {
    this.name = `Angular! v${VERSION.full}`
  }
  ngAfterViewInit()
  {
     this.el.nativeElement.style.display='none';
     console.log(this.el.nativeElement);
  }
}

@NgModule({
  imports: [ BrowserModule ],
  declarations: [ App ],
  bootstrap: [ App ]
})
export class AppModule {}

HTMLElement.hidden, This is quite different from using the CSS property display to control the visibility of an element. The hidden property applies to all presentation� Javascript Object Oriented Programming Front End Technology Using Css style we can hide or show HTML elements in javascript. Css provides properties such as block and none to hide/show the HTML elements.

@Component({
  selector: 'my-app',
  template: `
   <div #id>
      <p>Hide This!</p>
   </div>
<div>
    <p>Hello World</p>
</div>
  `,
})
export class AppComponent {    
@ViewChild('id') id:ElementRef;
  constructor() {}
  ngOnInit()
  {
     this.id.nativeElement.hidden=true;
  }
}

Hiding / removing elements in DOM using JavaScript, In this article, we'll take a look at how to hide and remove elements in DOM by using JavaScript, and we'll learn a few techniques and explain� The visibility property is used to hide or show the content of HTML elements. The visibility property specifies that the element is currently visible on the page. The ‘hidden’ value can be used to hide the element. This hides the element but does not remove the space taken by the element, unlike the display property.

The simplest way to hide elements using DOM is

document.getElementById('123').hidden = true;

in typescript.

Hide or show elements in HTML using display property , Style display property is used to hide and show the content of HTML DOM by accessing the DOM element using JavaScript/jQuery. To hide an� Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, PHP, Python, Bootstrap, Java and XML.

Using [hidden] instead of [ngIf] (Angular), I had a hidden HTML input element that getting images and I have manually call the click function in a typescript method. So in my application, I� Style display property is used to hide and show the content of HTML DOM by accessing the DOM element using JavaScript/jQuery. To hide an element, set the style display property to “none”. document.getElementById("element").style.display = "none"; To show an element, set the style display property to “block”.

show and hide elements using ngIf and hidden in angular2, DOCTYPE html> <html> <head> <title>Angular 2 QuickStart</title> <meta {{ hidden}}</p> <hr> <div [hidden]="hidden">This is another div using hidden attribute</div> ` }) export 'ts': 'npm:plugin-typescript@4.0.10/lib/plugin.js', ' typescript':� It shows part of a message when row.messageText.length is greater than 30. I need first span to show entire message (by using row.messageText.substr()) after clicking the more span. I think that there is a solution by using (click)="toggle()" and setting some true/false values. Do you have any ideas?

Angular ng-hide Directive, Supported by all HTML elements. Parameter Values. Value, Description. expression, An expression that will hide the element if the expression returns true . These are two ways to show/hide an element. The only difference is: *ngIf will remove the element from DOM while [hidden] will tell the browser to show/hide an element using CSS display property by keeping the element in DOM.

Comments
  • You can access the dom element using ViewChild and localvariable
  • Thanks! So is there any way to hide the element by using id instead using 'this.isVisible=false;'?