You can do the following things: Use ng-model if you want to bind a html component to angular scope. In a standard "static" webpage, the browser does this for the user automatically. Angular 6 track scroll position of div within div, https://stackblitz.com/edit/angular-kqvraz, Making location easier for developers with new data primitives, Stop requiring only one assertion per unit test: Multiple assertions are fine, Mobile app infrastructure being decommissioned. Now we need to make sure that this function is called every time the screen is scrolled. "users-loading") is also how the ScrollPositionDirective differentiates between different loading elements on the same page. - ischenkodv. They can still re-publish the post if they are not suspended. I prefer women who cook good food, who speak three languages, and who go mountain hiking - what if it is a woman who only has one of the attributes? Restores the previous scroll position when you navigate back to a previous route. There's some additional customization you can do for the ScrollPositionDirective. I use this to get mouse position, how do I get scroll from top position? > Is God worried about Adam eating once or in an on-going pattern from the Tree of Life at Genesis 3:22? Should we burninate the [variations] tag? Try to subscribe to the element that has scrollbar, for example: fromEvent(document.body, 'scroll'). This sets us up to build a ScrollPositionDirective (@service-work/scroll-position) which automatically saves an elements scroll position on router navigation, and automatically refreshes an element's scroll position after all the pieces of an element have finished loading. For example, if you're showing an admin dashboard, maybe there are a number of divs on the page that you'd like to independently refresh the scroll position for. Event.srcElement is now deprecated; use Event.target instead. Before you can refresh the scroll position of an element, you need to wait for all the data that element needs to load. Maintain/Save/Restore scroll position when returning to a ListView, Angular exception: Can't bind to 'ngForIn' since it isn't a known native property, Tracking scroll position and notifying other components about it, Could not find module "@angular-devkit/build-angular". 175 W 200 S, For example, if you have a component and you try to refresh the scroll position before the items have finished loading, nothing will happen because the component's height in the DOM will not account for all of the items that haven't been loaded. We want to refresh the scroll position of an element that doesn't depend on any asynchronous data. DEV Community 2016 - 2022. *ngFor='let user of users | async' Make sure the [stickyHeaderDirective] element has the correct CSS styling to allow it to scroll. Find centralized, trusted content and collaborate around the technologies you use most. The prepareFor() method, is called everytime just before the messageList is updated. Try to subscribe to the element that has scrollbar, for example: it has a scroll bar, and I need to get the scroll position of the component not the window which doesn't have a scroll, Getting the scroll position for an Angular component, Making location easier for developers with new data primitives, Stop requiring only one assertion per unit test: Multiple assertions are fine, Mobile app infrastructure being decommissioned. Is there a trick for softening butter quickly? you can scroll to top smooth in angular 6, angular 7, angular 8, angular 9, angular 10, angular 11, angular 12, angular 13 and angular 14 app. Here is what you can do to flag johncarroll: johncarroll consistently posts content that violates DEV Community 's Develop custom UI Library with Node.js and Ang 8+ locally, Easily Call API in React Native and React JS, Angular 2, Travis CI, Coveralls and Open Sauce, OAuth 1.0 Twitter Authentication on NodeJS. Make a wide rectangle out of T-Pipes without loops. If johncarroll is not suspended, they can still re-publish their posts from their dashboard. Now to check if this works, in the constructor of your app.component.ts, subscribe to the BehaviourSubject and thats that. Why does it matter that a group of January 6 rioters went to Olive Garden for dinner after the riot? Simply by applying the [swScrollPosition] directive to the div element (seen here with the key "lorum-ipsum"), Angular will now automatically remember and refresh this element's scroll position when you navigate away from, and back to, this component (admittedly, this example component doesn't have that much text so I'd imagine most of the time everything can fit in the viewport without needing a scrollbar). To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Reason for use of accusative in this phrase?

element. [routerLink]="['/user', user.id, 'profile']" There are some simple techniques to get the scrollbar position that are discussed below: Method 1: Whenever the function getScroll () is encountered, it sets the current value of the scrollbar to the span element whose id is position. This is useful (and necessary) if the host component is inside of an ngIf structural directive and is being shown / hidden by logic other than page navigation. Made with love and Ruby on Rails. prepareFor() to store the position before the older messages are stored. And this simple little thing, took the better part of a week! > Thanks for keeping DEV Community safe. In this article, we will learn how to get and set the scroll position of an HTML element using JavaScript. In C, why limit || and && to evaluate to booleans? The loading key (e.g. There's also very little documentation for it.

Introduction. A good solution would be for the older messages to load in the background so that the user can scroll up to see the loaded messages without a noticable delay. This field is for validation purposes and should be left unchanged. Error when trying to inject a service into an angular component "EXCEPTION: Can't resolve all parameters for component", why? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Say you want to show a loading indicator while the #user-list element is loading. Water leaving the house when water cut off. I thought about numerous approaches and tried out a few. currentSection: BehaviorSubject<String> = new BehaviorSubject('home');