vue get scroll position of element

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scroll tracker. Does it make sense to say that if someone was hired for an academic position, that means they were the "best"? Example: const container = document.querySelector('. Do you see the issue now? On mobile browsers, the browser url bar/back buttons (think mobile safari/chrome) are hidden according to scroll position on the window/body. Thanks for your answer. The common way to do this now is by using the element.getBoundingClientRect() method. let { x, y } = window.__scrollOffset[this.$route.fullPath]; Can scrollBehaviour support to specify scroll container? You don't need special functions for this, before/afterEach would be a much better place to put these kinds of things. window.__scrollOffset[this.$route.fullPath] = { See the Pen E.g: I'm fairly certain this method could be made into a plugin of some sort. For any routes you want to remember the position, just add the route name to the remember array. }, Well occasionally send you account related emails. Does the Fog Cloud spell work in conjunction with the Blind Fighting fighting style the way I think it does? js set scroll position. How can we build a space probe's computer to survive centuries of interstellar travel? 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. It works relatively good, but it makes me nervous. The key to this . By clicking Sign up for GitHub, you agree to our terms of service and A very simple way to do it in TypeScript: export default { 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). to your account. Here is my new logic in the elementInViewport function: See the Pen Sign in Therefore it sufficies to override these three: In my case, my scroll container is the

element. 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. The key here is to first detect if the page is cached or not. It would be nice if we could somehow define from which element we want to save the scroll position. There may be other solutions. How can I get query parameters from a URL in Vue.js? Thats as far as I got for trying to accurately track what blocks are on screen. }`. While converting legacy jquery code, I stuck at getting position of element. Updating now. Lets determine when the element is notoutside the viewport. vuejs update parent data from child component, Create sliding left effect using Vuejs animation, VueJS conditionally add an attribute for an element. My goal is display floating div above a tag. Vue scroll tracking (9) by Jim Schofield (@oldcoyote) - 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. Hook in a afterEach route guard so the root element knows when navigation happens. 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. So why use this? Also, support for intersectionObserver is not great, but it was good enough for my clients requirements for browser support. Whats happening? In other cases when the onActivated and onDeactivated are invoked we know that transition between cached page and other components are happening. Fix one corner and the others are messed up. 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). So I boldly went down the easiest path of scroll tracking in Vue. Ive xed out the ones I now think are not in the viewport. Cool, thanks for your feedback. Please comment below or tweet me. It works. For those who want the scrollBehavior to apply to another element instead of window, there's a way to hack the default behavior. rev2022.11.3.43005. Perfect! I adjust the rules about how far in to the viewport the element has to be. 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. But there are more problems. If I scroll slowly, the active state jumps all over the place!. Your email address will not be published. I recently was on a project for a client that needed a marketing-style single page site. That was a lot. 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'. If the block is small enough (like the first one) it wont ever be active! Here are our current in viewport possibilities. 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: 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. on CodePen. Vue scroll tracking (1) by Jim Schofield (@oldcoyote) Stack Overflow for Teams is moving to its own domain! Making statements based on opinion; back them up with references or personal experience. That, my friends, will be our next post. 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. document.getElementById('app').scrollIntoView(); If anything, vue should implement an html directive ie:
that vue automatically picks up to override scroll position tracking for that component only. 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. This seems the most simple solution for default history behavior in vue with a scrollable element that isn't window: 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. But I want to get the. So well just set it up and call it the naive intersectionObserver implementation.. Am I missing some easy way to do this? Therefore you will see incorrect result in SOME cases (scroll position 0). 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. Blocks will always be a minimum height of 40vh. What a second! you say, Thats worse! Theres a problem though if the blocks are any smaller, or any larger, certain blocks will be missed. put it at the end, just in case. Heck yes! I haven't gotten that far yet :). window.__scrollOffset = {}; Thanks for your answer. Connect and share knowledge within a single location that is structured and easy to search. Hello gyus i am trying all day but without find any solution.I am going to explain in simple way (not exactly how my component is).So i have the below html I want with vue.js, when the user is scrolling down the page once,to go from one section to another whether he is scrolling down or scrolling up. javascript scroll to id element. 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). As a side note, it would be nice if the window.scrollTo(position.x, position.y) line in scroll.js was overridable so that custom scroll libraries could be used instead of scrollTo. Vue scroll tracking (7) by Jim Schofield (@oldcoyote) if(window.__scrollOffset && window.__scrollOffset[this.$route.fullPath]) { Correct handling of negative chapter numbers. But theres still an issue. 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. 2022 Moderator Election Q&A Question Collection. Is it implemented? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Vue scroll tracking (2) by Jim Schofield (@oldcoyote) } Does a creature have to see to be affected by the Fear spell initially since it is an illusion? Vue scroll tracking (4) by Jim Schofield (@oldcoyote) I was struggling to find the optimal way to track that scroll in Vue, without using the scroll listener. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. The nightmare is below. Heres how it works. As your answer, I modified be below. A caveat before I go into this method: I still havent found a bulletproof method for this. They wanted scroll tracking so that as the user scrolls the section they are currently on would be highlighted in the sticky header. See the Pen 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. Now we have to supply input parameter that is equal to route name.. A little bit more work but still works as intended. Its like putting carpet in a room when theres not enough square feet of carpet! But dont lose hope! on CodePen. This behavior would be incredibly useful to get scrolling working without requiring html history usage. Were going to change this threshold option into an array so this event fires a whole lot, and then were going to have to try some fancy shmancy decision to see which block is really the active on. Our function is called every time an element is either 50% in the viewport or 50% out of 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? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. You signed in with another tab or window. on CodePen. The 0, 0 position is always found in the top left corner, so any scrolling is relative to that. Why don't we consider drain-bulk voltage instead of source-bulk voltage in body effect? Here is some hackiness that I put together with the following assumptions: See the Pen 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. Let me know @jschof or in the comments. Intersection observers are performant, so instead of firing a million scroll events the observer only fires at these thresholds. Support parent container for scroll behavior. 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. const scroller = this.$refs.scroller; there is one page that shows the infinite list of items and is using keep-alive directive to cache the contents. Regarding my example app structure, I'd like to keep the router's functionality exactly as is, i.e. Asking for help, clarification, or responding to other answers. y: scroller.scrollTop Thanks! It is simply that our elementInViewport function is too strict. let position = document.getElementById(assetID).getBoundingClientRect(); let left = position.x; let top = position.top; But, too big. }; VueRouter use window.pageXOffset and window.pageYOffset to get the position during saving, and calls window.scrollTo to apply the saved position. IMO, we should set a scrollEl property in main router config. Does squeezing out liquid from shredded potatoes significantly reduce cook time? }, on CodePen. So like in a lot of things in math and logic, lets not determine when the element is in 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). That's why we don't need to listen to popstate event and define our custom beforeEach navigation guard. get scroll bottom position javascript. on CodePen. on CodePen. on CodePen. scroller.scrollLeft = x; One thing I would improve still is adding a composable function instead of repeating the same logic over and over. on CodePen. See the Pen Alright, so were going to do some math with our blocks position. Can you catch it? console log window scroll position. I decided that the header should attach event listeners for when the user scrolls. I save scroll states of a child component by saving $refs.scrollElement.scrollTop on beforeRouteLeave, and restore it at beforeRouteEnter. 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. In my case, Nothing worked for me js how to scroll to element. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. If you have other onMounted, onActivated, onDeactivated methods you probably want them to run first. We may not be able to identify the right block simply by whats firing, but this does give us effectively a more performant scroll event. Find centralized, trusted content and collaborate around the technologies you use most. window scroll to div javascript. Vue scroll tracking (6) by Jim Schofield (@oldcoyote) Basically the problem isnt removed, we just have a better(?) You pass the intersection observer an element and a callback function, and when the element intersects the viewport the callback is called. next() Thanks for your answer. } VueJS: Get left, top position of element? I have updated the function to use the router's beforeEach hook instead. ), You can define thresholds so that when a certain ratio of the block is in the viewport the function is triggered. Am I way off base? What other options do we have besides tweaking these viewport rules? I need to override the default behavior which stores the window's scroll position, and instead store the scroll position of another element. Vue scroll tracking (5) by Jim Schofield (@oldcoyote) This is not a Vue question per se, but more a javascript question. 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.). QGIS pan map in layout, simultaneously with items on top. Vue scroll tracking (3) by Jim Schofield (@oldcoyote) Would it be illegal for me to act as a Civillian Traffic Enforcer? 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. (This is coffeescript, sorry. 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? Because order matters. 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. better ? methods: { 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. scroller.scrollTop = y; And theres no way for just block 1 to be in view, so its never highlighted! How do I simplify/combine these two methods for finding the smallest and largest int in an array? 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). I hope this helped anyone! So, this was showing a couple ways to do scroll tracking inside of a Vue component. Is cycling an aerobic or anaerobic exercise? scroll into view js. I also ran into a bunnnnnch of other gotchas while developing a psuedo-cms. Do US public school students have a First Amendment right to be able to perform sacred music? We now never see an active state for block 6! To subscribe to this RSS feed, copy and paste this URL into your RSS reader. beforeRouteLeave (to, from, next) { } @yyx990803 Does vue-router save scroll position of the or window? on CodePen. Amazingly, I came across your article, matching exactly with my needs . This is about when I started to lose all hope. Thanks for contributing an answer to Stack Overflow! As your answer, I modified be below. Once you have the element, you can inspect its scrollLeft and scrollTop properties. I'm confident you can deal with it). I decided that the header should attach event listeners for when the user scrolls. And would render libraries such as https://github.com/jeneser/vue-scroll-behavior unnecessary (at least when using html history mode), since we could just use the vue-router behavior to do such. 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. 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. My legacy jquery is using $(this).position() as below. 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. Hi, I would like to replace an old code made with JQuery with a new one using Vue.js. container') container.scrollTop container.scrollLeft 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. What is a current status? So I boldly went down the easiest path of scroll tracking in Vue. Its working. Heres basically the formula I came up with: See the Pen One works with the popstate event and push() method of window.history, while the other requires to read and write to a certain DOM elements property. 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. Should we burninate the [variations] tag? when your page rendered, calling the function to set scroll position. Iteration 1: Naive scroll watching. Each component know's which child element within needs to scroll. privacy statement. 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. What if any of the blocks are taller than the viewport? Example: @LinusBorg see my issue's program #1249 , is that possible to realize? scrollTop(){ setScroll(scroller) { I want to know the `' tag position then display popup above the a tag. Is there a way to have the . }, Second, access the scroll position of the element via the scrollLeft and scrollTop properties. edit 2: unfortunately it looks like onDeactivated function is not guaranteed to be always executed before the content from the old page disappears. 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. let position = document.getElementById(assetID).getBoundingClientRect(); let left = position.x; let top = position.top; But, too big. Example: http://codepen.io/brad426/pen/pezRge. how to find the element scroll position. Or need use one of custom workaround proposed above? } Required fields are marked *, Artisanally hand-crafted with mucho amor by Jim Schofield By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Also, provide a method for restoring a scroll position. Vue scroll tracking (8) by Jim Schofield (@oldcoyote) how to get window scroll position in javascript. Its not so great at determining which section is theimportant section on the screen and where they are. I want to catch if the savedPosition has been set, and if possible read out the x/y and overrule this. I'm just using current mouse pointer's position, but need element's absolute position. 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. To learn more, see our tips on writing great answers. Just as a reference, after some head scratching, here is a pure vue solution (no jquery needed). x: scroller.scrollLeft, Thank you so much ! have it call saveScrollPosition whenever a popstate event is triggered, the only change would be to allow a custom handler for saveScrollPosition . There is still something deeply unsatisfying about this. but this below worked, `, methods: { I want to know the `<a>' tag position then display popup above the a tag. }. I just think this API is really interesting and it offloads work so youre not tying up the main thread. The key to this method is the handleScroll method: See the Pen The Element.scrollTop gets or sets the number of pixels that an element's content is scrolled . if(!window.__scrollOffset) { This code simply sets the top position of a div based on the scrollTop position of its wrapper div. What is the effect of cycling on weight loss? See the Pen 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. Its expecting our element to be both above the bottom of the viewport and below the top. 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? Not the answer you're looking for? You may be asking yourself, Couldnt we just have done that fancy logic with a scroll event?. How to add external JS scripts to VueJS Components? Only elements small enough get recognized! Difference between @click and v-on:click Vuejs. Yeah, it does. But all is not lost! Already on GitHub? 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 (). feature request: scrollBehavior save and restore scroll for designated element. My application uses a structure where the document/window stays static, and content scrolls inside of a container. Your email address will not be published. if(scroller) { 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. That way, when block one starts to go off screen, the first array element will just be block 2! 2019, What do you think? Thus allowing us to use a specific scroll container for both scrollBehavior and scroll position. This kind of specific posts is precious for the internet and brings back developers joy too silently. 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. Any update on this? Actually, because its so much smaller, sometimes 5 isnt even recognized! (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. Have a question about this project? So if we just always set the first entry to be active, it will jump around as a we scroll. For an element thats taller than the viewport that cant happen. Alright so if block 6 is much smaller, its never going to be recognized. See the Pen Hello everyone! I realize that I wasn't totally clear. scrollBehavior shouldn't use window.scrollTo, Is up to the component what child element scrolls, Provides consistent syntax across components and teams for readability. 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. 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. How to constrain regression coefficients to be proportional. Can customize scroll element not just window by using scrollBehavior api. 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