scrolling | scroll event from the callback functions | Frontend Framework library
kandi X-RAY | scrolling Summary
kandi X-RAY | scrolling Summary
Decouple the scroll event from the callback functions using requestAnimationFrames. It’s a very, very, bad idea to attach handlers to the window scroll event. Depending upon the browser the scroll event can fire a lot and putting code in the scroll callback will slow down any attempts to scroll the page (not a good idea). Any performance degradation in the scroll handler(s) as a result will only compound the performance of scrolling overall. Instead it’s much better to use some form of a timer to check every X milliseconds OR to attach a scroll event and only run your code after a delay (or even after a given number of executions – and then a delay).
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of scrolling
scrolling Key Features
scrolling Examples and Code Snippets
Lines of Code : 187License : Permissive (MIT)
Copy{
/**
* The scrollable container.
* It can be a selector string or the HTML element itself
*
* @default 'body'
* @type {String|HTMLElement}
*/
container: 'body',
/**
* Selector that will be used to recognize the navigation items i /**
* Optional method to reshape the data passed into ScrollyTeller, or resolved by the data promise
* @param {data} results - data passed into ScrollyTeller or the result of resolving a data promise
* @returns {object|array} - an object or array export interface UseA11yTargetOptions {
/**
* Sets the placement of the drawer menu
* @default "left"
*/
placement?: 'top' | 'right' | 'bottom' | 'left'
/**
* Adds this class name to props when the drawer is open
*/
openClass?: /*
find all the relavant canvas elements
and call forEach to loop through the array
*/
document.querySelectorAll('form canvas').forEach(canvas => {
// properties for the canvas element
canvas.drawing = false;
canvas.position = {val ACTION_IDLE = 0
val ACTION_DOWN = 1
val ACTION_MOVE = 2
val ACTION_UP = 3
val path = remember { Path() }
var motionEvent by remember { mutableStateOf(ACTION_IDLE) }
var currentPosition by remember { mutableStat// Animation frame
window.requestAnimFrame = (function (callback) {
return window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||document.querySelector("#btnCopy").addEventListener('click', copyToClipboard);
function copyToClipboard() {
let text = document.querySelector("#docNumber");
text.select();
text = text.value;
if (window.clipboardData && wiconst puppeteer = require("puppeteer"); /// import puppeteer from "puppeteer";
const xlsx = require("xlsx");
// Get the data
async function getPageData(url, page) {
await page.goto(url);
//Shop Name
await page.waitForSelector /**
* Scrolls to passed element and then Y pixels down by injecting js scroll() in the context of window
* @param {ElementFinder} $element Locator of element
* @param {number} [offsetY=Community Discussions
Trending Discussions on scrolling
QUESTION
Below is a screenshot of my current situation. Is it possible to make the text within the blob.svg white, and the text outside the blob.svg the color of the blob (#e60050)?
There is also a parallax effect on this particular element. The blob scrolls slower than the text. Therefore the text does not always overlap the blob in the same way/position. Based on the scrolling position, the text may even be completely within or without the blob.
I have been messing around with various implementations of mix-blend-mode now, but i can't seem to figure it out.
Current situation
...ANSWER
Answered 2022-Mar-10 at 03:28You can try using inverted colors and re-inverting the whole thing with a CSS filter like so:
QUESTION
After flutter 2.5 update listview is scrolling only on mobile platforms. It doesn't scroll when I open it on the web. It was working fine in the previous version. I tried the scroll physics but it didn't work. what do you suggest i do? sorry for my bad english.
...ANSWER
Answered 2022-Mar-02 at 19:02
ScrollBehaviorsnow allow or disallow drag scrolling from specifiedPointerDeviceKinds.ScrollBehavior.dragDevices, by default, allows scrolling widgets to be dragged by allPointerDeviceKindsexcept forPointerDeviceKind.mouse.
QUESTION
So I'm try to use ScrollViewReader to programmatically scroll a horizontal scroll view. I thought it would work like scrollToItem with .centeredHorizontally in UIKit, and for the most part it does, but the last few elements in the scroll view are being forcefully scrolled to the center of the screen, despite the fact that the scroll view isn't normally able to scroll that far over (without snapping back after releasing the drag, at least). This ends up creating white space across the trailing half of the screen.
I've seen some other questions about this and it seems like the general opinion is that it's not a bug? On the one hand I suppose we're telling the scroll view to center the item, and it's doing just that -- so, not a bug? On the other hand, that's not how similar functionality worked in UIKit. Also, this behavior is only happening on the trailing end of the scroll view! If it was the intended behavior I would expect that scrolling to the first element in the scroll view using .center anchor would force it into the center of the screen and leave leading white space, but this doesn't happen.
Is there an elegant solution to this? Or do we have to calculate the width of our elements + spacing and figure out based on the screen width whether we should anchor .center or just scroll to the last element with anchor .trailing in order to replicate the UIKit behavior?
...ANSWER
Answered 2021-Jul-25 at 06:31I found a package (Amzd/ScrollViewProxy) that was made before ScrollViewReader was released that functions much the same as ScrollViewReader, but also seems to not have the bug (if it is a bug) detailed in the question.
Usage examples can be seen on the repository page, but here's a quick minimal example.
QUESTION
I can confirm this issue happened in flutter above 2.5. Using 2.2.3 is fine. The question becomes why this feature been removed in 2.5 ? And how to enable it in flutter 2.5?
[Origin Question]I'm using SingleChildScrollView on flutter web with desktop browser. Scrolling only works on mouse wheel but not on mouse click (drag). How can I map mouse click to touch and scroll like mobile?
...ANSWER
Answered 2021-Sep-18 at 12:19Flutter change mouse scroll behavior after 2.5. See this for detail.
QUESTION
I am using VSCode to develop something using the Flutter Framework. The Flutter extension writes logs to the debug console. I scroll the debug console to the bottom, so it stays auto-scrolling / tailing the log.
Whenever the flutter logs write a large amount of data at once, the debug console stops tailing the log all of a sudden.
Has anyone observed this same issue before and found a solution?
...ANSWER
Answered 2022-Jan-16 at 17:32Go to settings (Ctrl+), search for "Word Wrap" and untick it.
As stated here: https://github.com/microsoft/vscode/issues/118702
If that doesn't work, there's an issue on Github which is still open to date. Keep an eye on it and wait for the fix:
QUESTION
After updating Android Studio to Arctic Fox | 2020.3.1 version, The IDE fixes extracted methods code snippet at top or bottom of screen depending on scrolling direction. As you can see in the image below, it's annoying because it fills a large part of screen.
Is there any way to avoid showing extracted methods code snippet?
...ANSWER
Answered 2021-Sep-29 at 20:59I found an answer here. it fixes the bug at the expense of having popup windows appear whenever you want to refactor something. i should have stayed on 4.2 XD
https://stackoverflow.com/a/68748331/10637400
credit goes @Chris Clarke.
maybe this helps reduce your time googling
QUESTION
I have product cell which I want to display on the list, I've used LazyColumn but performance was terrible, I couldn't find why it is so slow. Then I've switched LazyColumn to Column and all of the sudden scrolling is super smooth
LazyColumn version:
...ANSWER
Answered 2021-Nov-06 at 18:12It seems that initialising LazyColumn in this way solves my issue
QUESTION
ANSWER
Answered 2021-Oct-07 at 09:46You can disable it by providing LocalOverScrollConfiguration:
QUESTION
I have an input range in a div contained in an outer div that is smaller than the inner div. The final result is that my inner div scrolls horizontally (because the outer dive has overflow: scroll), and the input range is its child.
To customize the range, I removed the appearance in CSS with appearance: none. Now, here is what happens. When I check it in Chrome developer's tool (actually I use Brave, but I'm guessing it is the same in Chrome as I tested in Chromium, and it is the same) with the smartphone option active, 99% of the time if I try to move the range handle it moves the whole div with it. Now, if I disable the smartphone option, it works just fine. Also, if I keep the smartphone option and remove the appearance: none from CSS, it also works just fine, but my customizations to the range disappear. Does anyone know what is going on?
PS.: in Firefox, the input range doesn't work as long as I keep the smartphone option on (no matter if I have the appearance property or not).
Here is an animated gif of what I mean:
First, I have the described above with the input range with no appearance. It works fine, I can move the scrollable div and move the input range handle independently. Then I put the appearance: none to the input range (notice the formatting of the input range changes), now I can't move the input range handle independently from the scrollable div anymore. Finally, remove the appearance from the input range, and everything goes back to normal (but my customizations are gone)
Here is the code, but you can only simulate by using the developer's tool with the smartphone option active, where you can simulate the touch.
...ANSWER
Answered 2021-Oct-18 at 21:16It is not clear to me exactly why, but when you are in the mobile test view, disabling the height and width from #scrollarea in dev tools fixes the problem. The #scrollarea in the mobile view is handled by moving everything within the parameters.
Two other solutions, which avoid having to remove your parameters are setting position=fixed or position=absolute on #rangescroll.
QUESTION
I want to achieve the layout of the snippet below:
- non-fixed navbar at the top with unknown height
- fill the remaining screen space with the
#title div - the article continues after the title (not visible on the screen initially, only after scrolling down)
The problem with this snippet is, that it completely breaks the semantic hierarchy of the HTML. The #uglyWrapper splits the article in two parts.
I could use #title { height: calc(100vh - $nav-height) }, but the top bar is a flexbox itself. So $nav-height is unknwon.
Is there a CSS-only solution, that doesn't mess with this HTML structure:
...ANSWER
Answered 2021-Oct-22 at 20:35Apply absolute positioning to the
object-fit: cover, it shouldn't matter if a chunk from the top is covered by the navigation.
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