vue get scroll position of element

A very simple way to do it in TypeScript: export default { So well just set it up and call it the naive intersectionObserver implementation.. Correct handling of negative chapter numbers. scrollBehavior should allow configuring scrolling element, feat(scroll) - WIP - allow a different scroll element other than window, https://github.com/jeneser/vue-scroll-behavior, [DrawerType3] Scrolling position after routing. It works relatively good, but it makes me nervous. How do I simplify/combine these two methods for finding the smallest and largest int in an array? Can you catch it? As your answer, I modified be below. Well occasionally send you account related emails. There is still something deeply unsatisfying about this. const scroller = this.$refs.scroller; Thanks! Example: http://codepen.io/brad426/pen/pezRge. If you have other onMounted, onActivated, onDeactivated methods you probably want them to run first. Please comment below or tweet me. This is not a Vue question per se, but more a javascript question. I'm not sure whether Vue has the plugin to get the element position directly, you could survey more to check it out, or use @Imre_G 's answer. Its not so great at determining which section is theimportant section on the screen and where they are. to your account. What other options do we have besides tweaking these viewport rules? I'm just using current mouse pointer's position, but need element's absolute position. Its working. VueRouter use window.pageXOffset and window.pageYOffset to get the position during saving, and calls window.scrollTo to apply the saved position. window.__scrollOffset[this.$route.fullPath] = { So heres what we could do instead: how about we keep an array of blocks that are on the page and always select the element that comes first? Sign in Is it implemented? I adjust the rules about how far in to the viewport the element has to be. x: scroller.scrollLeft, Hello everyone! We now never see an active state for block 6! Yeah, it does. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. When the migration is complete, you will access your Teams at stackoverflowteams.com, and they will no longer appear in the left sidebar on stackoverflow.com. This seems the most simple solution for default history behavior in vue with a scrollable element that isn't window: In the meantime i solved it this way: I think this would be a pretty good and obvious feature to add :D. @blake-newman I disagree, I think that each router-view (component) should define it's scrollEl with a local scrollEl property on the component, or a v-scrollEl directive in html. scroll into view js. If the block is small enough (like the first one) it wont ever be active! This requires the to be wrapped in (or to simply have someplace else to store the scroll data, like vuex), so that the scroll data is available for routeBeforeEnter. Or need use one of custom workaround proposed above? } By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. This kind of specific posts is precious for the internet and brings back developers joy too silently. QGIS pan map in layout, simultaneously with items on top. Fix one corner and the others are messed up. Does squeezing out liquid from shredded potatoes significantly reduce cook time? Let me know @jschof or in the comments. get scroll bottom position javascript. It has to be a little fancy because we want our decision to take into account that certain scrollTop values will never be possible since the viewport stops you from scolling past a certain point. js how to scroll to element. 2022 Moderator Election Q&A Question Collection. Vue scroll tracking (8) by Jim Schofield (@oldcoyote) So if we just always set the first entry to be active, it will jump around as a we scroll. Does it make sense to say that if someone was hired for an academic position, that means they were the "best"? Whats happening? if(window.__scrollOffset && window.__scrollOffset[this.$route.fullPath]) { It would be nice if we could somehow define from which element we want to save the scroll position. on CodePen. There may be other solutions. See the Pen Iteration 1: Naive scroll watching. Each component know's which child element within needs to scroll. on CodePen. Finally, in the child component, restore the scroll position if wanted: Just wanted to "encapsulate" @mjl code, considering that this should be implemented in the near future keeping everything together should be easier further down the line. privacy statement. Theres a problem though if the blocks are any smaller, or any larger, certain blocks will be missed. console log window scroll position. Do you see the issue now? - The key to this . setScroll(scroller) { Making statements based on opinion; back them up with references or personal experience. I was struggling to find the optimal way to track that scroll in Vue, without using the scroll listener. } Actually, because its so much smaller, sometimes 5 isnt even recognized! I want to know the `<a>' tag position then display popup above the a tag. @yyx990803 Does vue-router save scroll position of the or window? }, } How to add external JS scripts to VueJS Components? For an element thats taller than the viewport that cant happen. how to get window scroll position in javascript. I decided that the header should attach event listeners for when the user scrolls. on CodePen. In my case, however, I find it much easier to just override the scroll position per specific page, since I don't have that many pages anyways. I need to override the default behavior which stores the window's scroll position, and instead store the scroll position of another element. You may be asking yourself, Couldnt we just have done that fancy logic with a scroll event?. next() Required fields are marked *, Artisanally hand-crafted with mucho amor by Jim Schofield methods: { For any routes you want to remember the position, just add the route name to the remember array. Need a way to set what scroll position is saved, 'scrollBehavior: navigating to history entry, scroll to saved position', 'navigating to new history entry, scroll to top'. container') container.scrollTop container.scrollLeft Thanks for contributing an answer to Stack Overflow! Already on GitHub? 2019, What do you think? there is one page that shows the infinite list of items and is using keep-alive directive to cache the contents. And theres no way for just block 1 to be in view, so its never highlighted! How can I get query parameters from a URL in Vue.js? The text was updated successfully, but these errors were encountered: I think this won't be so easy to do since those two things - the scrollposition the router saves right now, and the scrollpostion of an arbitrary element - have not much in common, technically. beforeRouteLeave (to, from, next) { Thanks for your answer. Stack Overflow for Teams is moving to its own domain! feature request: scrollBehavior save and restore scroll for designated element. https://caniuse.com/#feat=getboundingclientrect, 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. Thank you so much ! I want to know the `' tag position then display popup above the a tag. Does a creature have to see to be affected by the Fear spell initially since it is an illusion? Its expecting our element to be both above the bottom of the viewport and below the top. vuejs update parent data from child component, Create sliding left effect using Vuejs animation, VueJS conditionally add an attribute for an element. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. So I boldly went down the easiest path of scroll tracking in Vue. Those are all unfortunate side-effects, but mobile browsers ignoring overflow: hidden on body sometimes forces us to use another container for scrolling, since the only way around that is setting a wrapper element to position: fixed. But all is not lost! Here are our current in viewport possibilities. Here is an alternative implementation (inspired by @unamix): This implementation relies on a fact that savedPosition is null when user navigates forward and { x: number; y: number; } otherwise. But I want to get the. The scrollBehavior could be an object instead of a function but as @LinusBorg I'm wondering if keeping this behaviour in a component isn't more flexible and reusable. To learn more, see our tips on writing great answers. It works. Asking for help, clarification, or responding to other answers. This is about when I started to lose all hope. let position = document.getElementById(assetID).getBoundingClientRect(); let left = position.x; let top = position.top; But, too big. Hook in a afterEach route guard so the root element knows when navigation happens. scrollBehavior shouldn't use window.scrollTo, Is up to the component what child element scrolls, Provides consistent syntax across components and teams for readability. Cool, thanks for your feedback. It is simply that our elementInViewport function is too strict. If I scroll slowly, the active state jumps all over the place!. But dont lose hope! It would be inappropriate to let the app decide what element within all components should be scrollable (as you would have to go into each component and add the scroll class/id). Updating now. That way, when block one starts to go off screen, the first array element will just be block 2! Can scrollBehaviour support to specify scroll container? scrollTop(){ On mobile browsers, the browser url bar/back buttons (think mobile safari/chrome) are hidden according to scroll position on the window/body. In my case, Nothing worked for me Regarding my example app structure, I'd like to keep the router's functionality exactly as is, i.e. Does the Fog Cloud spell work in conjunction with the Blind Fighting fighting style the way I think it does? I also ran into a bunnnnnch of other gotchas while developing a psuedo-cms. I have updated the function to use the router's beforeEach hook instead. So a cheap workaround is to add a footer, or extra space below the block, so that you can scroll long enough until block 5 is out of the picture. Therefore you will see incorrect result in SOME cases (scroll position 0). window.__scrollOffset = {}; That, my friends, will be our next post. Now we have to supply input parameter that is equal to route name.. A little bit more work but still works as intended. And since the header knows about the anchor links its linked to, it can just look to see whats in the viewport and highlight that link. Not the answer you're looking for? One thing I would improve still is adding a composable function instead of repeating the same logic over and over. So like in a lot of things in math and logic, lets not determine when the element is in the viewport. Once you have the element, you can inspect its scrollLeft and scrollTop properties. Our function is called every time an element is either 50% in the viewport or 50% out of the viewport. Extending @iBrazilian2 's solution, you can leverage the savedPosition parameter in scrollBehavior to only navigate to the saved position of your scroll element when navigating back/forward from history (popstate). Alright, so were going to do some math with our blocks position. That's why we don't need to listen to popstate event and define our custom beforeEach navigation guard. I hope this helped anyone! But theres still an issue. on CodePen. Is there a way to have the . Any update on this? I recently was on a project for a client that needed a marketing-style single page site. Well, both block 1 and block 2 are in the viewport in that order, and the active state is then changed from block 1 to block 2 instantly. In the root component, give the scrolling element a ref property, and pass a scroll_last_position prop to the router-view, containing a callback that restores the last scroll position. but this below worked, `, methods: { let position = document.getElementById(assetID).getBoundingClientRect(); let left = position.x; let top = position.top; But, too big. Connect and share knowledge within a single location that is structured and easy to search. To get or set the scroll position of an element, you follow these steps: First, select the element using the selecting methods such as querySelector (). They wanted scroll tracking so that as the user scrolls the section they are currently on would be highlighted in the sticky header. scroll tracker. Finding features that intersect QgsRectangle but are not equal to themselves using PyQGIS, What does puncturing in cryptography mean, Book where a girl living with an older relative discovers she's a robot, SQL PostgreSQL add attribute from polygon to all points inside polygon but keep all points not just those that fall inside polygon. javascript scroll to id element. better ? Thus allowing us to use a specific scroll container for both scrollBehavior and scroll position. Similar to the way you can define a scrollBehavior function on a router instance, I need a way to define how the savedPosition value gets computed/populated. Thats as far as I got for trying to accurately track what blocks are on screen. 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? See the Pen how to find the element scroll position. So why use this? Vue scroll tracking (1) by Jim Schofield (@oldcoyote) put it at the end, just in case. Difference between @click and v-on:click Vuejs. Here is my new logic in the elementInViewport function: See the Pen I save scroll states of a child component by saving $refs.scrollElement.scrollTop on beforeRouteLeave, and restore it at beforeRouteEnter. have it call saveScrollPosition whenever a popstate event is triggered, the only change would be to allow a custom handler for saveScrollPosition . What a second! you say, Thats worse! on CodePen. You signed in with another tab or window. on CodePen. I just think this API is really interesting and it offloads work so youre not tying up the main thread. Should we burninate the [variations] tag? How can we build a space probe's computer to survive centuries of interstellar travel? Heck yes! Alright so if block 6 is much smaller, its never going to be recognized. Vue scroll tracking (7) by Jim Schofield (@oldcoyote) What if any of the blocks are taller than the viewport? Have a question about this project? https://caniuse.com/#feat=getboundingclientrect, https://developer.mozilla.org/en-US/docs/Web/API/Element/getBoundingClientRect, for example (you still need to customize to fit your needs.). The 0, 0 position is always found in the top left corner, so any scrolling is relative to that. rev2022.11.3.43005. window scroll to div javascript. I'm confident you can deal with it). My goal is display floating div above a tag. The realization I have made that if you use the container to show the data - the scrollBehavior function is no longer something you could rely on.. @MuTsunTsai made a good explanation how you could do some overrides to make it work for you. The key here is to first detect if the page is cached or not. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. What is the effect of cycling on weight loss? That was a lot. And were going to use intersection observer to trigger a performant scroll event. Basically, were going to figure out what percent each of the blocks are down the document, and track when the scrollTop property is around that percentage. Here is my visualization: If you think about it, each scrollTop of each un-transformed block will shrink by the proportion that the viewport height takes up on the document height. As your answer, I modified be below. By clicking Sign up for GitHub, you agree to our terms of service and }, IMO, we should set a scrollEl property in main router config. Your email address will not be published. }`. E.g: I'm fairly certain this method could be made into a plugin of some sort. Heres basically the formula I came up with: See the Pen Also, it seems that vue-router should NOT implement this at allscrolling a container that is not supported has unintended side-effects ex: safari scroll to top doesnt work, mobile pull to reload can get trapped, scrolling can get trapped by an outer element and require two taps to scroll, etc. If you use overflow: hidden; on the window/body then you have just disabled the browsers ability to show/hide its controls as well as the many other things I mentioned. I realize that I wasn't totally clear. What I am saying, really, is that you should avoid disabling scrolling on the body and using position: fixed; to create your own viewport, and try to find another way/use routing or conditionals with transitions if you need to bring in overlays etc. Why don't we consider drain-bulk voltage instead of source-bulk voltage in body effect? (There are some ways to have it check intersecting other things, like other containers and divs, but for now lets let it default to the viewport. ), You can define thresholds so that when a certain ratio of the block is in the viewport the function is triggered. on CodePen. scroller.scrollLeft = x; Find centralized, trusted content and collaborate around the technologies you use most. Vue scroll tracking (5) by Jim Schofield (@oldcoyote) }, In your case this would be: Create a ref on your element and pass that ref in a method like this: In your methods object create the method to handle the click: Supported by all current browsers: on CodePen. Extending @iBrazilian2 's solution, you can leverage the savedPosition parameter in scrollBehavior to only navigate to the saved position of your scroll element when navigating back/forward from history (popstate). Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. A caveat before I go into this method: I still havent found a bulletproof method for this. I haven't gotten that far yet :). Lets determine when the element is notoutside the viewport. But herein lies the rub: its really great for running code like lazy loading where you just need to know whether an element is in the viewport. This seems the most simple solution for default history behavior in vue with a scrollable element that isn't window: the original suggestion would be a good use case to add, am wondering if this is still being considered? I want to catch if the savedPosition has been set, and if possible read out the x/y and overrule this. Am I missing some easy way to do this? Heres how it works. Amazingly, I came across your article, matching exactly with my needs . This code simply sets the top position of a div based on the scrollTop position of its wrapper div. Notice that in my scrollTo function, I query the last matching element, in order to make it compatible with transitions (in which multiple

elements will co-exist). Support parent container for scroll behavior. I notice a little difference between the old code and the new one: using Vue.js the div with dynamic top position always "bounce" on scroll (this doesn't happen using JQuery). You pass the intersection observer an element and a callback function, and when the element intersects the viewport the callback is called. Therefore it sufficies to override these three: In my case, my scroll container is the

element. Just as a reference, after some head scratching, here is a pure vue solution (no jquery needed). And since the header knows about the anchor links it's linked to, it can just look to see what's in the viewport and highlight that link. Basically the problem isnt removed, we just have a better(?) See the Pen Here is some hackiness that I put together with the following assumptions: See the Pen The Element.scrollTop gets or sets the number of pixels that an element's content is scrolled . Only elements small enough get recognized! See the Pen In terms of encapsulation, each component could be from a different source, as an app could be composed of many separate components from different authors on the web. I decided that the header should attach event listeners for when the user scrolls. onMounted is only called once the component is initialized the first time, meaning that no data is loaded and we can simply scroll to top. Do US public school students have a First Amendment right to be able to perform sacred music? Thanks for your answer. if(scroller) { Vue scroll tracking (3) by Jim Schofield (@oldcoyote) js set scroll position. on CodePen. I agree that this functionality would be useful to all sorts of components, but I think a lot of people might also find a "global" override useful. Thanks for your answer. Blocks will always be a minimum height of 40vh. Also, support for intersectionObserver is not great, but it was good enough for my clients requirements for browser support. document.getElementById('app').scrollIntoView(); Sign up for a free GitHub account to open an issue and contact its maintainers and the community. For those who want the scrollBehavior to apply to another element instead of window, there's a way to hack the default behavior. Can customize scroll element not just window by using scrollBehavior api. In that route guard, capture the current scroll position of the referenced element and store it for the from route, then restore the old position of the to route. Ive xed out the ones I now think are not in the viewport. Hi, I would like to replace an old code made with JQuery with a new one using Vue.js. Intersection observers are performant, so instead of firing a million scroll events the observer only fires at these thresholds. You don't need special functions for this, before/afterEach would be a much better place to put these kinds of things. See the Pen If anything, vue should implement an html directive ie: