What is the equivalent of ngShow and ngHide in Angular 2+?

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I have a number of elements that I want to be visible under certain conditions.

In AngularJS I would write

<div ng-show="myVar">stuff</div>

How can I do this in Angular 2+?

What is the equivalent of ngShow and ngHide in Angular 2+? , Hi, For ngHide in angular2+ you directly bind html attribute with angular like this: Just bind to the hidden property [hidden]="!myVar" See this :hidden There are  ngShow and ngHide are two ng directives in AngularJS used to show and hide the elements respectively. ngShow is used to show a div tab by linking it to a Boolean variable in the script. If the value of the variable is true then the item is displayed, else the item remains hidden and the vice versa happens in the case of ngHide.

Use the [hidden] attribute:

[hidden]="!myVar"

Or you can use *ngIf

*ngIf="myVar"

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.

What is the equivalent of ngShow and ngHide in Angular 2+?, myValue is truthy (element is visible) --> <div ng-show="myValue"></div> <! .ng -hide:not(.ng-hide-animate) { /* These are just alternative ways of hiding an  Hi, For ngHide in angular2+ you directly bind html attribute with angular like this: Just bind to the hidden property [hidden]="!myVar" See this :hidden There are some issues: hidden has some issues though because it can conflict with CSS for the

I find myself in the same situation with the difference than in my case the element was a flex container.If is not your case an easy work around could be

[style.display]="!isLoading ? 'block' : 'none'"

in my case due to the fact that a lot of browsers that we support still need the vendor prefix to avoid problems i went for another easy solution

[class.is-loading]="isLoading"

where then the CSS is simple as

&.is-loading { display: none } 

to leave then the displayed state handled by the default class.

AngularJS: API: ngShow, Today we'll be looking at how we can use Angular's ngShow and ngHide ngShow and ngHide allow us to display or hide different elements. isEven = function(value) { if (value % 2 == 0) return true; else return false; };. Migration to Angular 2+ Modules; ng-class directive; ng-repeat; ng-style; ng-view; Performance Profiling; Prepare for Production - Grunt; Print; Profiling and Performance; Providers; Routing using ngRoute; Services; Session storage; Sharing Data; SignalR with AngularJs; The Self Or This Variable In A Controller; ui-router; Unit tests; Use of in-built directives

Sorry, I have to disagree with binding to hidden which is considered to be unsafe when using Angular 2. This is because the hidden style could be overwritten easily for example using

display: flex;

The recommended approach is to use *ngIf which is safer. For more details, please refer to the official Angular blog. 5 Rookie Mistakes to Avoid with Angular 2

<div *ngIf="showGreeting">
   Hello, there!
</div>

How To Use NgShow and NgHide ― Scotch.io, I have a number of elements that I want to be visible under certain conditions. In AngularJS I would write <div ng-show="myVar">stuff</div>. How can I do this in  How can I do this in Angular 2+? According to Angular 1 documentation of ngShow and ngHide , both of these directive adds the css style display: none !important; , to the element according to the condition of that directive (for ngShow adds the css on false value, and for ngHide adds the css for true value).

If your case is that the style is display none you can also use the ngStyle directive and modify the display directly, I did that for a bootstrap DropDown the UL on it is set to display none.

So I created a click event for "manually" toggling the UL to display

<div class="dropdown">
    <button class="btn btn-default" (click)="manualtoggle()"  id="dropdownMenu1" >
    Seleccione una Ubicación
    <span class="caret"></span>
    </button>
    <ul class="dropdown-menu" [ngStyle]="{display:displayddl}">
        <li *ngFor="let object of Array" (click)="selectLocation(location)">{{object.Value}}</li>                                
     </ul>
 </div>    

Then on the component I have showDropDown:bool attribute that I toggle every time, and based on int, set the displayDDL for the style as follows

showDropDown:boolean;
displayddl:string;
manualtoggle(){
    this.showDropDown = !this.showDropDown;
    this.displayddl = this.showDropDown ? "inline" : "none";
}

What is the equivalent of ngShow and ngHide in Angular 2+?, I have a number of elements that I want to be visible under certain conditions. In AngularJS I would write. selon la documentation angulaire 1 de ngShow et ngHide , ces deux directives ajoutent le style css display: none !important;, à l'élément selon la condition de cette directive (pour ngShow ajoute le css sur la fausse valeur, et pour ngHide ajoute le css pour la vraie valeur).

What is the equivalent of ngShow and ngHide in Angular 2+?, In AngularJS, the ng-show directive shows or hides the associated DOM element, based on For performance reasons, no comparable pipe exists in Angular. Selects up to the first parameter (2) number of items from the collection starting  What is the equivalent of ngShow and ngHide in Angular? 261+ points 🔹 206,651+ viewed Mihai R?ducanu asked, I have a number of elements that I want to be visible under certain conditions.

AngularJS to Angular concepts: Quick reference, of elements that I want to be visible under certain conditions. In AngularJS I would write <div ng-show="myVar">stuff</div>. How can I do this in Angular 2+?. ngShow and ngHide allow us to display or hide different elements. This helps when creating Angular apps since our single page applications will most likely have many moving parts that come and go as the state of our application changes.

What is the equivalent of ngShow and ngHide in Angular 2+?, In angular js 1 it was ng-show and ng-hide, and <div> < button What is the equivalent of ngShow and ngHide in Angular 2+? To hide and show div on button  Angular ngShow and ngHide Directive. Today, We want to share with you Angular ngShow and ngHide Directive. In this post we will show you ngShow and ngHide in angularjs with Example, hear for Simple AngularJS ng-show and ng-hide Tutorial with example we will give you demo and example for implement.

Comments
  • [hidden]="!myVar".. this works in angular 2+
  • Using hidden is actually not recommended. angularjs.blogspot.com/2016/04/…
  • *ngIf may be the correct way in most cases, but sometimes you actually want an element to be there, visually hidden. A CSS style with [hidden]{display:none!important} helps. That's, for example, how Bootstrap makes sure [hidden] elements are actually hidden. See GitHub
  • You may encounter some issue when you use (myStream | async) pipe inside of *ngIf that also uses (myStream | async) pipe
  • you are my saviour! using *ngIf will reset the DOM position to the top but [hidden] solved my problem and preserved the position.
  • One case where one might want to use [hidden] over *ngIf is when you are using HostListener (and want to differentiate document clicks vs event.target), when trying to show and hide elements (like with custom drop downs)
  • [hidden] is adding conditionnaly an attribute "hidden" to the element. It also could be [whatever] or [ali]. The important thing here is to load a CSS rule who mention "hidden" attributes has to be display:none
  • Bear in mind: *ngIf and [hidden] are fundamentalyl different. ngIf will not evaluate the content inside the *ngIf block until the condition is true. This is especially important if you use the async pipe, as the subscription to the observable will only be added after the condition becomes true!
  • One more thing to take into consideration is that *ngIf destroys the component and it has to be re-created, while [hidden] keeps it alive and in memory. If you have a resource-intense component it may be preferable to hide it instead of destroy it
  • they are not same thing.
  • This works well with bootstrap 4 invalid-feedback class.
  • I think it's a rookie mistake to say something is bad before knowing the exact requirements. If one doesn't want an element to be removed and destroyed and added and recreated, *ngIf is a poor choice. But you are right that consequences need to be considered and pointing out pitfalls is always a good idea.
  • I know what you mean. It is not my word about it is a novice mistake, it is taken from Angular 2 official blog. I don't mean to offend anyone. Thanks for pointing out, though.