onscroll

问题 Does anyone know how to make multiple on scroll fixed headers? I've checked answers such as this. It's kind of what I want, but I want that header to stop before another header and when the first header gets scrolled past the second header should be taking the first header's place and stick at the very top of the screen. But they don't work for me because they're using libraries that I'm not working with(jQuery, etc.) and they are overly, overly complicated. I've tried to do this, I got it to

问题 Does anyone know how to make multiple on scroll fixed headers? I've checked answers such as this. It's kind of what I want, but I want that header to stop before another header and when the first header gets scrolled past the second header should be taking the first header's place and stick at the very top of the screen. But they don't work for me because they're using libraries that I'm not working with(jQuery, etc.) and they are overly, overly complicated. I've tried to do this, I got it to

问题 I want to postion a DIV inside a page such that it is visible to the user even if the user vertically scrolls the page. The page has a heading at the top of the page which is 75 px tall. Now when the user is at the top of the page and has not scrolled vertically, the DIV must be postioned below the heading. However, once the user scrolls the page causing the heading to go out of sight, the same DIV must now be position at the top of the page (i.e. near the top edge of the browser viewport) My

问题 When I set the onScrollListener for my ListView , it calls onScroll . This causes a crash because certain things haven't been initialized. Is this normal? Note: this is happening without me even touching the phone. public class MainActivity1 extends Activity implements OnClickListener, OnScrollListener { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.layout1); ListView lv = (ListView)findViewById(R.id.listview1); lv

问题 I can't seem to capture the scroll event on an iPad. None of these work, what I am doing wrong? window.onscroll=myFunction; document.onscroll=myFunction; window.attachEvent("scroll",myFunction,false); document.attachEvent("scroll",myFunction,false); They all work even on Safari 3 on Windows. Ironically, EVERY browser on the PC supports window.onload= if you don't mind clobbering existing events. But no go on iPad. 回答1: The iPhoneOS does capture onscroll events, except not the way you may

问题 I have a CSS layout as in the attached picture. I'd like to achieve the following behaviour When part of the header is visible the positions (when scrolling) are as in the picture. When header is invisible (we're scrolling down more then header length), the positions of left, right and img should be fixed and the only scrollable part should be page content. So far fiddle link Liam suggested this link but javascript has error Uncaught TypeError: Property '$' of object [object DOMWindow] is not

问题 Is there a Dojo method that wraps window.onscroll? I want to be able to capture the page scrolling. I can capture the mousewheel but can't seem to find any reference to capturing the actual page scroll. I've tried lots of variations but the event just doesn't seem to fir at all. any ideas? 回答1: dojo.connect(window, 'onscroll', this, function(event) { var scrollTop = dojo._docScroll().y; //code to handle scroll }); This works for me whether the document is scrolled via mousewheel, scrollbar,

问题 Is it possible to shrink both the height and the width of a div simultaneously while scrolling down a page? For example, as the user scrolls down, the div size goes from 400px by 400px to 200px by 200px while staying in the center of the page? I know it's possible to shrink the height OR the width using jQuery, but I haven't seen anything on shrinking both. 回答1: You can get the height and width, decrement both, and then reapply the new values inside of a scroll event. var divToChange = $('

问题 I'm trying to change the background image of an element after a certain position has been scrolled past. Here's a snippet of my code: <body> <script> window.onscroll = function() {scrollBG()}; function scrollBG() { if (document.body.scrollTop > document.getElementById("one").getBoundingClientRect().top || document.documentElement.scrollTop > document.getElementById("one").getBoundingClientRect().top) { document.getElementById("outer").style.backgroundImage = "url('imgs/pic1.jng')"; } else {

问题 I have an issue with the window.onScroll event. The event was never triggered. That's my first try: @override void ngOnInit() { window.onScroll.listen((Event event) => print("it works..")); } But it's not working. I basiclly need the onScroll event. Not more. So i tried the "old school" way in Html My second try: <div (scroll)="onScroll()"> <!--Some content--> </div> But it's also not working. What is the best solution to get the scroll event in AngularDart? By the way, i use AngularDart 5.