Reverse Infinite Scroll not Working properly when mouse scroll is active
I want to create a chat-like component with an "infinite" scroll, so that initially the user just sees the latest messages and when scrolling to the top - new messages are loaded and the user can see "older" messages.
I am working with Angular 7 and tried to implement it with three different components (propreitary, Prime NG's datascroll with a few changes[inverted] and Infinite Scroll component), but I keep getting the same problem:
When the new messages are added at the end of the list - everything works fine, but when I try to add the messages at the begining of the list it does not work if I am using a mouse to scroll up.
If I use the keyboard - the new messages are added and the scrollTop position is maintained relatively. But if I use the mouse to scroll up (mouse drag) the ABSOLUTE scrollTop position is maintained and the user looses track of the messages.
Example:
If the initial subset was messages 36-45, and the user scrolls up to message 36, I'd like to load 10 more messages (26-35), but keep the scroll position on message 36 (for a smooth experience). If I scroll up with the keyboard, that's exactly what happens, but if I scroll up using the mouse the - absolute value of the scrollTop is kept and the list "jumps" to message 26.
I can set the scrollTop via code, but when the scrolling continues, the position "jumps" back to the previous scrollTop value.
Any idea why that happens? How can I fix that?
javascript
angular dom asked Jan 3 at 12:37
Tal ShefferTal Sheffer
507
add a comment |
I want to create a chat-like component with an "infinite" scroll, so that initially the user just sees the latest messages and when scrolling to the top - new messages are loaded and the user can see "older" messages.
I am working with Angular 7 and tried to implement it with three different components (propreitary, Prime NG's datascroll with a few changes[inverted] and Infinite Scroll component), but I keep getting the same problem:
When the new messages are added at the end of the list - everything works fine, but when I try to add the messages at the begining of the list it does not work if I am using a mouse to scroll up.
If I use the keyboard - the new messages are added and the scrollTop position is maintained relatively. But if I use the mouse to scroll up (mouse drag) the ABSOLUTE scrollTop position is maintained and the user looses track of the messages.
Example:
If the initial subset was messages 36-45, and the user scrolls up to message 36, I'd like to load 10 more messages (26-35), but keep the scroll position on message 36 (for a smooth experience). If I scroll up with the keyboard, that's exactly what happens, but if I scroll up using the mouse the - absolute value of the scrollTop is kept and the list "jumps" to message 26.
I can set the scrollTop via code, but when the scrolling continues, the position "jumps" back to the previous scrollTop value.
Any idea why that happens? How can I fix that?
javascript
angular dom asked Jan 3 at 12:37
Tal ShefferTal Sheffer
507
add a comment |
I want to create a chat-like component with an "infinite" scroll, so that initially the user just sees the latest messages and when scrolling to the top - new messages are loaded and the user can see "older" messages.
I am working with Angular 7 and tried to implement it with three different components (propreitary, Prime NG's datascroll with a few changes[inverted] and Infinite Scroll component), but I keep getting the same problem:
When the new messages are added at the end of the list - everything works fine, but when I try to add the messages at the begining of the list it does not work if I am using a mouse to scroll up.
If I use the keyboard - the new messages are added and the scrollTop position is maintained relatively. But if I use the mouse to scroll up (mouse drag) the ABSOLUTE scrollTop position is maintained and the user looses track of the messages.
Example:
If the initial subset was messages 36-45, and the user scrolls up to message 36, I'd like to load 10 more messages (26-35), but keep the scroll position on message 36 (for a smooth experience). If I scroll up with the keyboard, that's exactly what happens, but if I scroll up using the mouse the - absolute value of the scrollTop is kept and the list "jumps" to message 26.
I can set the scrollTop via code, but when the scrolling continues, the position "jumps" back to the previous scrollTop value.
Any idea why that happens? How can I fix that?
javascript
angular dom asked Jan 3 at 12:37
Tal ShefferTal Sheffer
507
I want to create a chat-like component with an "infinite" scroll, so that initially the user just sees the latest messages and when scrolling to the top - new messages are loaded and the user can see "older" messages.
I am working with Angular 7 and tried to implement it with three different components (propreitary, Prime NG's datascroll with a few changes[inverted] and Infinite Scroll component), but I keep getting the same problem:
When the new messages are added at the end of the list - everything works fine, but when I try to add the messages at the begining of the list it does not work if I am using a mouse to scroll up.
If I use the keyboard - the new messages are added and the scrollTop position is maintained relatively. But if I use the mouse to scroll up (mouse drag) the ABSOLUTE scrollTop position is maintained and the user looses track of the messages.
Example:
If the initial subset was messages 36-45, and the user scrolls up to message 36, I'd like to load 10 more messages (26-35), but keep the scroll position on message 36 (for a smooth experience). If I scroll up with the keyboard, that's exactly what happens, but if I scroll up using the mouse the - absolute value of the scrollTop is kept and the list "jumps" to message 26.
I can set the scrollTop via code, but when the scrolling continues, the position "jumps" back to the previous scrollTop value.
Any idea why that happens? How can I fix that?
javascript
angular dom javascript
angular dom asked Jan 3 at 12:37
Tal ShefferTal Sheffer
507
asked Jan 3 at 12:37
Tal ShefferTal Sheffer
507
edited Jan 7 at 13:41
Tal Sheffer
asked Jan 3 at 12:37
Tal ShefferTal Sheffer
507
asked Jan 3 at 12:37
Tal ShefferTal Sheffer
507
asked Jan 3 at 12:37
Tal ShefferTal Sheffer
507
507
add a comment |
add a comment |
0
active
oldest
votes
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f54022445%2freverse-infinite-scroll-not-working-properly-when-mouse-scroll-is-active%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f54022445%2freverse-infinite-scroll-not-working-properly-when-mouse-scroll-is-active%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
