The malfunctioning collapse feature in Bootstrap 4 sidebar within an Angular 6 application

I am trying to find a way to collapse and reopen the sidebar when clicking on a button. I have attempted to create a function to achieve this, but unfortunately it did not work as expected.

Important: I need to collapse the sidebar without relying on jquery or javascript.

This is what I currently have:

https://stackblitz.com/edit/angular-n4x1br?file=src%2Fapp%2Fsidebar%2Fsidebar.component.html

Answer №1

The ngClass directive in your code is applying the show class, but you actually want to apply the active class instead.

<nav id="sidebar" [ngClass]="{ 'active': navbarOpen }">

Check out this StackBlitz link for reference

Answer №2

Start by creating a boolean variable named 'collapsed' set to true. When you click on a button, it toggles between true and false, changing the style of your HTML according to the variable's value. Good luck!

This code belongs in your HTML:

<div class="sidenav" [ngClass]="screen.collapsed ? 'sidenav-collapsed': ''">

This function should go in your TypeScript file:

togglecollapse(): void{ 
this.screen.collapsed = !this.screen.collapsed; 

}

When you call this function with a button click, it will update the variable and adjust the CSS accordingly.

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