Angular 6 track scroll position of div within div
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty height:90px;width:728px;box-sizing:border-box;
I am trying to create a directive that tracks the Y position of the element it is placed on - when this element reaches the top of the parent div, I will add sticky styling to make the header stick to the top until the whole element has been scrolled.
I have tried to track the scrolling, but can't get any output apart from the initial ngoninit log:
import Directive, OnInit, ElementRef, HostBinding, HostListener from '@angular/core';
@Directive(
/* tslint:disable-next-line:directive-selector */
selector: '[stickyHeaderDirective]'
)
export class StickyHeaderDirective implements OnInit
ngOnInit()
console.log('lets track ths scroll');
constructor()
@HostListener('scroll', ['$event']) private onScroll($event: Event): void
console.log($event.srcElement.scrollLeft, $event.srcElement.scrollTop);
What am i missing?
angular scroll angular2-directives asked Nov 15 '18 at 14:12
user3024827user3024827
314423
add a comment |
I am trying to create a directive that tracks the Y position of the element it is placed on - when this element reaches the top of the parent div, I will add sticky styling to make the header stick to the top until the whole element has been scrolled.
I have tried to track the scrolling, but can't get any output apart from the initial ngoninit log:
import Directive, OnInit, ElementRef, HostBinding, HostListener from '@angular/core';
@Directive(
/* tslint:disable-next-line:directive-selector */
selector: '[stickyHeaderDirective]'
)
export class StickyHeaderDirective implements OnInit
ngOnInit()
console.log('lets track ths scroll');
constructor()
@HostListener('scroll', ['$event']) private onScroll($event: Event): void
console.log($event.srcElement.scrollLeft, $event.srcElement.scrollTop);
What am i missing?
angular scroll angular2-directives asked Nov 15 '18 at 14:12
user3024827user3024827
314423
add a comment |
I am trying to create a directive that tracks the Y position of the element it is placed on - when this element reaches the top of the parent div, I will add sticky styling to make the header stick to the top until the whole element has been scrolled.
I have tried to track the scrolling, but can't get any output apart from the initial ngoninit log:
import Directive, OnInit, ElementRef, HostBinding, HostListener from '@angular/core';
@Directive(
/* tslint:disable-next-line:directive-selector */
selector: '[stickyHeaderDirective]'
)
export class StickyHeaderDirective implements OnInit
ngOnInit()
console.log('lets track ths scroll');
constructor()
@HostListener('scroll', ['$event']) private onScroll($event: Event): void
console.log($event.srcElement.scrollLeft, $event.srcElement.scrollTop);
What am i missing?
angular scroll angular2-directives asked Nov 15 '18 at 14:12
user3024827user3024827
314423
I am trying to create a directive that tracks the Y position of the element it is placed on - when this element reaches the top of the parent div, I will add sticky styling to make the header stick to the top until the whole element has been scrolled.
I have tried to track the scrolling, but can't get any output apart from the initial ngoninit log:
import Directive, OnInit, ElementRef, HostBinding, HostListener from '@angular/core';
@Directive(
/* tslint:disable-next-line:directive-selector */
selector: '[stickyHeaderDirective]'
)
export class StickyHeaderDirective implements OnInit
ngOnInit()
console.log('lets track ths scroll');
constructor()
@HostListener('scroll', ['$event']) private onScroll($event: Event): void
console.log($event.srcElement.scrollLeft, $event.srcElement.scrollTop);
What am i missing?
angular scroll angular2-directives angular scroll angular2-directives asked Nov 15 '18 at 14:12
user3024827user3024827
314423
asked Nov 15 '18 at 14:12
user3024827user3024827
314423
asked Nov 15 '18 at 14:12
user3024827user3024827
314423
asked Nov 15 '18 at 14:12
user3024827user3024827
314423
asked Nov 15 '18 at 14:12
user3024827user3024827
314423
314423
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
HostListener only listens for scroll events which occur on the [stickyHeaderDirective] element. That element must be the one firing the scroll events.
Make sure the [stickyHeaderDirective] element has the correct CSS styling to allow it to scroll. Here's a demo showing the difference with and without CSS styles.
for (let element of document.getElementsByClassName('track-scrolling'))
element.addEventListener('scroll', e =>
console.log(e.srcElement.scrollLeft, e.srcElement.scrollTop);
);
.container
height: 200px;
width: 200px;
overflow: auto;
margin: 10px;
border: 1px solid;
.big-content
height: 1000px;
width: 1000px;
.track-scrolling.wrong
/*
No overflow property
No height/width or max-height/width
*/
color: red;
.track-scrolling.right
overflow: auto;
max-height: 100%;
color: green;
<div class="container">
<div class="track-scrolling wrong">
I won't fire scroll events
<div class="big-content"></div>
</div>
</div>
<div class="container">
<div class="track-scrolling right">
I will fire scroll events
<div class="big-content"></div>
</div>
</div>And here's a demo showing the same behavior with your directive: https://stackblitz.com/edit/angular-kqvraz
answered Nov 15 '18 at 15:06
Alex KAlex K
1,210610
Fantastic - thank you for such a detailed answer! much help
– user3024827
Nov 15 '18 at 18:20
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
HostListener only listens for scroll events which occur on the [stickyHeaderDirective] element. That element must be the one firing the scroll events.
Make sure the [stickyHeaderDirective] element has the correct CSS styling to allow it to scroll. Here's a demo showing the difference with and without CSS styles.
for (let element of document.getElementsByClassName('track-scrolling'))
element.addEventListener('scroll', e =>
console.log(e.srcElement.scrollLeft, e.srcElement.scrollTop);
);
.container
height: 200px;
width: 200px;
overflow: auto;
margin: 10px;
border: 1px solid;
.big-content
height: 1000px;
width: 1000px;
.track-scrolling.wrong
/*
No overflow property
No height/width or max-height/width
*/
color: red;
.track-scrolling.right
overflow: auto;
max-height: 100%;
color: green;
<div class="container">
<div class="track-scrolling wrong">
I won't fire scroll events
<div class="big-content"></div>
</div>
</div>
<div class="container">
<div class="track-scrolling right">
I will fire scroll events
<div class="big-content"></div>
</div>
</div>And here's a demo showing the same behavior with your directive: https://stackblitz.com/edit/angular-kqvraz
answered Nov 15 '18 at 15:06
Alex KAlex K
1,210610
Fantastic - thank you for such a detailed answer! much help
– user3024827
Nov 15 '18 at 18:20
add a comment |
HostListener only listens for scroll events which occur on the [stickyHeaderDirective] element. That element must be the one firing the scroll events.
Make sure the [stickyHeaderDirective] element has the correct CSS styling to allow it to scroll. Here's a demo showing the difference with and without CSS styles.
for (let element of document.getElementsByClassName('track-scrolling'))
element.addEventListener('scroll', e =>
console.log(e.srcElement.scrollLeft, e.srcElement.scrollTop);
);
.container
height: 200px;
width: 200px;
overflow: auto;
margin: 10px;
border: 1px solid;
.big-content
height: 1000px;
width: 1000px;
.track-scrolling.wrong
/*
No overflow property
No height/width or max-height/width
*/
color: red;
.track-scrolling.right
overflow: auto;
max-height: 100%;
color: green;
<div class="container">
<div class="track-scrolling wrong">
I won't fire scroll events
<div class="big-content"></div>
</div>
</div>
<div class="container">
<div class="track-scrolling right">
I will fire scroll events
<div class="big-content"></div>
</div>
</div>And here's a demo showing the same behavior with your directive: https://stackblitz.com/edit/angular-kqvraz
answered Nov 15 '18 at 15:06
Alex KAlex K
1,210610
Fantastic - thank you for such a detailed answer! much help
– user3024827
Nov 15 '18 at 18:20
add a comment |
HostListener only listens for scroll events which occur on the [stickyHeaderDirective] element. That element must be the one firing the scroll events.
Make sure the [stickyHeaderDirective] element has the correct CSS styling to allow it to scroll. Here's a demo showing the difference with and without CSS styles.
for (let element of document.getElementsByClassName('track-scrolling'))
element.addEventListener('scroll', e =>
console.log(e.srcElement.scrollLeft, e.srcElement.scrollTop);
);
.container
height: 200px;
width: 200px;
overflow: auto;
margin: 10px;
border: 1px solid;
.big-content
height: 1000px;
width: 1000px;
.track-scrolling.wrong
/*
No overflow property
No height/width or max-height/width
*/
color: red;
.track-scrolling.right
overflow: auto;
max-height: 100%;
color: green;
<div class="container">
<div class="track-scrolling wrong">
I won't fire scroll events
<div class="big-content"></div>
</div>
</div>
<div class="container">
<div class="track-scrolling right">
I will fire scroll events
<div class="big-content"></div>
</div>
</div>And here's a demo showing the same behavior with your directive: https://stackblitz.com/edit/angular-kqvraz
answered Nov 15 '18 at 15:06
Alex KAlex K
1,210610
HostListener only listens for scroll events which occur on the [stickyHeaderDirective] element. That element must be the one firing the scroll events.
Make sure the [stickyHeaderDirective] element has the correct CSS styling to allow it to scroll. Here's a demo showing the difference with and without CSS styles.
for (let element of document.getElementsByClassName('track-scrolling'))
element.addEventListener('scroll', e =>
console.log(e.srcElement.scrollLeft, e.srcElement.scrollTop);
);
.container
height: 200px;
width: 200px;
overflow: auto;
margin: 10px;
border: 1px solid;
.big-content
height: 1000px;
width: 1000px;
.track-scrolling.wrong
/*
No overflow property
No height/width or max-height/width
*/
color: red;
.track-scrolling.right
overflow: auto;
max-height: 100%;
color: green;
<div class="container">
<div class="track-scrolling wrong">
I won't fire scroll events
<div class="big-content"></div>
</div>
</div>
<div class="container">
<div class="track-scrolling right">
I will fire scroll events
<div class="big-content"></div>
</div>
</div>And here's a demo showing the same behavior with your directive: https://stackblitz.com/edit/angular-kqvraz
for (let element of document.getElementsByClassName('track-scrolling'))
element.addEventListener('scroll', e =>
console.log(e.srcElement.scrollLeft, e.srcElement.scrollTop);
);
.container
height: 200px;
width: 200px;
overflow: auto;
margin: 10px;
border: 1px solid;
.big-content
height: 1000px;
width: 1000px;
.track-scrolling.wrong
/*
No overflow property
No height/width or max-height/width
*/
color: red;
.track-scrolling.right
overflow: auto;
max-height: 100%;
color: green;
<div class="container">
<div class="track-scrolling wrong">
I won't fire scroll events
<div class="big-content"></div>
</div>
</div>
<div class="container">
<div class="track-scrolling right">
I will fire scroll events
<div class="big-content"></div>
</div>
</div>for (let element of document.getElementsByClassName('track-scrolling'))
element.addEventListener('scroll', e =>
console.log(e.srcElement.scrollLeft, e.srcElement.scrollTop);
);
.container
height: 200px;
width: 200px;
overflow: auto;
margin: 10px;
border: 1px solid;
.big-content
height: 1000px;
width: 1000px;
.track-scrolling.wrong
/*
No overflow property
No height/width or max-height/width
*/
color: red;
.track-scrolling.right
overflow: auto;
max-height: 100%;
color: green;
<div class="container">
<div class="track-scrolling wrong">
I won't fire scroll events
<div class="big-content"></div>
</div>
</div>
<div class="container">
<div class="track-scrolling right">
I will fire scroll events
<div class="big-content"></div>
</div>
</div>answered Nov 15 '18 at 15:06
Alex KAlex K
1,210610
edited Nov 15 '18 at 15:15
answered Nov 15 '18 at 15:06
Alex KAlex K
1,210610
answered Nov 15 '18 at 15:06
Alex KAlex K
1,210610
answered Nov 15 '18 at 15:06
Alex KAlex K
1,210610
1,210610
Fantastic - thank you for such a detailed answer! much help
– user3024827
Nov 15 '18 at 18:20
add a comment |
Fantastic - thank you for such a detailed answer! much help
– user3024827
Nov 15 '18 at 18:20
Fantastic - thank you for such a detailed answer! much help
– user3024827
Nov 15 '18 at 18:20
Fantastic - thank you for such a detailed answer! much help
– user3024827
Nov 15 '18 at 18:20
add a comment |
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