disable full page scrolling on iOS devices

Can you achieve elastic scrolling for a single absolutely positioned div in Mobile Safari without causing the entire page to move up and down?

Check out this basic example that illustrates the problem:

<!doctype html>
<html>
<head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no">
    <meta name="apple-mobile-web-app-capable" content="yes" />
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        #a, #b {
            position: absolute;
            top: 0;
            left: 0;
            height: 100%;
            padding: 10px;
            overflow: auto;
        }
        #a {
            width: 80px;
            background: #f00;
        }
        #b {
            background: #00f;
            left: 80px;
            width: 100%;
        }
    </style>
    <script src="http://code.jquery.com/jquery-1.10.1.min.js"></script>
    <script>
        function pdcb(e) {
            e.preventDefault();
        }
        function npcb(e) {
            e.stopPropagation();
        }
        $(document).on('touchstart touchmove', pdcb).
                    on('touchstart touchmove', '.scrollable', npcb);
    </script>
</head>
<body>
    <div id="a" class="scrollable">
        This<br>
        should<br>
        be<br>
        scrollable<br>
        but<br>
        not<br>
        scroll<br>
        the<br>
        whole<br>
        page<br>
        This<br>
        should<br>
        be<br>
        scrollable<br>
        but<br>
        not<br>
        scroll<br>
        the<br>
        whole<br>
        page<br>
        This<br>
        should<br>
        be<br>
        scrollable<br>
        but<br>
        not<br>
        scroll<br>
        the<br>
        whole<br>
        page<br>
        This<br>
        should<br>
        be<br>
        scrollable<br>
        but<br>
        not<br>
        scroll<br>
        the<br>
        whole<br>
        page<br>
        This<br>
        should<br>
        be<br>
        scrollable<br>
        but<br>
        not<br>
        scroll<br>
        the<br>
        whole<br>
        page<br>
    </div>
    <div id="b">
        this should never scroll
    </div>
</body>
</html>

Solution:

$(document).on('touchmove', function(e) {
    e.preventDefault();
}).ready(function() {
    $(".scrollable").on('touchstart', function(e) {
        this.allowUp = (this.scrollTop > 0);
        this.allowDown = (this.scrollTop < this.scrollHeight - this.clientHeight);
        this.prevTop = null;
        this.prevBot = null;
        this.lastY = e.originalEvent.pageY;
    }).on('touchmove', function(e) {
        var event = e.originalEvent;
        var up = (event.pageY > this.lastY), down = !up;
        this.lastY = event.pageY;

        if ((up && this.allowUp) || (down && this.allowDown))
            event.stopPropagation();
        else
            event.preventDefault();
    });
});
javascripthtmlioscssmobile-safari

Answer №1

The initial responses were impressive, however they had some shortcomings that I managed to rectify:

  • Elements positioned at the top or bottom did not scroll properly.
  • Dynamically added elements lacked scroll handlers.
  • There were unnecessary variables (prevTop, prevBot).

My solution tackles these issues. (Note the use of .scroll-y instead of .scrollable)

Firstly, introduce these CSS styles:

.scroll-y {
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch; /* preferred webkit native scroll */
}

Apply the .scroll-y class to any elements requiring scrolling functionality.

Then, implement this JavaScript code somewhere in your project:

// Disable default document scrolling behavior
$(document).on('touchmove', function(e) {
  e.preventDefault();
});

// Determine whether to allow vertical scrolling
$(document.body).on("touchstart", ".scroll-y", function (e) {
  // If element has overflowing content...
  if (this.scrollHeight !== this.clientHeight) {
    // Adjust scroll position slightly to enable up-scrolling from top
    if (this.scrollTop === 0) {
      this.scrollTop = 1;
    }
    // Adjust scroll position slightly to enable down-scrolling from bottom
    if (this.scrollTop === this.scrollHeight - this.clientHeight) {
      this.scrollTop = this.scrollHeight - this.clientHeight - 1;
    }
  }
  // Check scroll direction feasibility
  this.allowUp = this.scrollTop > 0;
  this.allowDown = this.scrollTop < (this.scrollHeight - this.clientHeight);
  this.lastY = e.originalEvent.pageY;
});

$(document.body).on('touchmove', ".scroll-y", function(e) {
  var event = e.originalEvent;
  var up = event.pageY > this.lastY;
  var down = !up;
  this.lastY = event.pageY;

  if ((up && this.allowUp) || (down && this.allowDown)) {
    event.stopPropagation();
  } else {
    event.preventDefault();
  }
});

Answer №2

Ensure that the touchmove event works properly within your div container without triggering scroll on the entire page. To achieve this, allow the native touchmove event to function within the element but prevent it from propagating up the DOM tree.

If you reach the edge of the content in your element, disable the native momentum scrolling completely.

The following code snippet, inspired by a tutorial found online (unfortunately, the original source is unknown), can be utilized for this purpose:

Assuming 'elem' represents your DOM node

elem.addEventListener('touchstart', function(event){
    this.allowUp = (this.scrollTop > 0);
    this.allowDown = (this.scrollTop < this.scrollHeight - this.clientHeight);
    this.prevTop = null; this.prevBot = null;
    this.lastY = event.pageY;
});

elem.addEventListener('touchmove', function(event){
    var up = (event.pageY > this.lastY), down = !up;
    this.lastY = event.pageY;

    if ((up && this.allowUp) || (down && this.allowDown)) event.stopPropagation();
    else event.preventDefault();
});

To apply the above code iteratively, create an array of elements and loop through them.

Good luck implementing this solution!

Answer №3

Aaron Grey's note proved to be very helpful!

For more information, visit: 

<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="minimum-scale=1.0, width=device-width, maximum-scale=1.0, user-scalable=no, initial-scale=1">
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <style>

        .page{
            font-size: 24px;
            overflow: scroll;
        }

        .menu{
            position: fixed;
            top: 0;
            bottom: 0;
            left: 0;
            width: 80%;
            background: gray;
            z-index: 1;
            font-size: 10px;
            overflow: scroll;
            /* uncomment to get smooth momentum scroll, but also a rubber band effect */
            /*-webkit-overflow-scrolling: touch;*/
        }

        .menu-item{
            padding: 10px;
            background: darkgray;
            font-size: 24px;
        }

    </style>
</head>

<body>

<div class="menu scrollable">
    <div class="menu-item">hello world</div>
    <div class="menu-item">hello world</div>
    <div class="menu-item">hello world</div>
    <div class="menu-item">hello world</div>
    <div class="menu-item">hello world</div>
    <div class="menu-item">hello world</div>
    <div class="menu-item">hello world</div>
    <div class="menu-item">hello world</div>
    <div class="menu-item">hello world</div>
    <div class="menu-item">hello world</div>
    <div class="menu-item">hello world</div>
    <div class="menu-item">hello world</div>
    <div class="menu-item">hello world</div>
    <div class="menu-item">hello world</div>
    <div class="menu-item">hello world</div>
    <div class="menu-item">hello world</div>
    <div class="menu-item">hello world</div>
    <div class="menu-item">hello world</div>
</div>

<div class="page disable-scrolling">
    Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's
    standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make
    a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting,
    remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing
    Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions
    of Lorem Ipsum.
</div>

<script>


    document.ontouchmove = function ( event ) {

        var isTouchMoveAllowed = true, target = event.target;

        while ( target !== null ) {
            if ( target.classList && target.classList.contains( 'disable-scrolling' ) ) {
                isTouchMoveAllowed = false;
                break;
            }
            target = target.parentNode;
        }

        if ( !isTouchMoveAllowed ) {
            event.preventDefault();
        }

    };

    function removeIOSRubberEffect( element ) {

        element.addEventListener( "touchstart", function () {

            var top = element.scrollTop, totalScroll = element.scrollHeight, currentScroll = top + element.offsetHeight;

            if ( top === 0 ) {
                element.scrollTop = 1;
            } else if ( currentScroll === totalScroll ) {
                element.scrollTop = top - 1;
            }

        } );

    }

    removeIOSRubberEffect( document.querySelector( ".scrollable" ) );


</script>

</body>
</html>

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Ways to update the contents of an individual div within an ng-repeat loop

I am currently working on some Angular code. <div ng-repeat="item in items | filter:search" class="container"> <h3>{{item.name}}</h3> <p>category:{{item.category}}</p> <p>price:INR {{ ...

javascriptangularjs

Encountering the error message "Attempting to access properties of undefined (specifically 'map')". Despite having the array properly declared and imported

I am facing an issue while trying to iterate through an array and display names for each person. Despite declaring the array properly, it is returning as undefined which is causing the .map function to fail. Can you help me figure out where I am making a m ...

javascriptreactjsarraysnext.js

AngularJS: Enhancing User Experience by Preserving View State and Setup through Routes

Is it possible in a single page application to switch back and forth between AngularJS routes while maintaining the same state? Traditionally, this would involve binding data in a parent scope. However, for views with extensive graphical elements, this me ...

javascriptangularjsangularjs-routing

There seems to be an issue with Jquery not triggering the Webservice method in the Firefox browser, despite it working successfully in Chrome

Currently, I have an issue where a webservice method called via ajax in jQuery is functioning correctly in Chrome and IE browsers but not in Firefox. Here is the jQuery code: $("#btnUpdate").click(function () { var objEmp = { employeeID: $("#Em ...

javascriptjqueryajaxjquery-ui

Setting the default selection in AngularJS based on the URL entered

I've encountered an issue with a dropdown menu in my AngularJS version 1.4 application. The dropdown menu contains links to different sections of the page. The problem arises when I directly enter the page URL - instead of selecting the correct link f ...

javascriptangularjs

What type of JavaScript scope is accessible by an anchor tag's href attribute?

My current query involves using an <a> tag to invoke a JavaScript function: <a href="javascript:doSomething();">link</a> In which scope does this JS function need to be defined in order to be reachable? Is declaring it globally necessar ...

javascripthtmlscopeanchor

Is it possible to alter the style of the <input type="file"> element?

After attempting to modify the HTML form input type file, here is the snippet of code I used: In HTML, within form id = form <input class="upload_file" type="file" id="file" name="file" /> .CSS I experimented with both approaches: .upload_button{ ...

css

I'm curious about how I can apply @media queries given that certain phones possess higher resolution than computers

There seems to be a common recommendation to utilize @media queries for adjusting CSS based on whether the user is on mobile or not. However, I'm a bit confused because my phone has a width of 1440p while my computer has 1920p. Should I consider apply ...

javascriptjqueryhtmlcss

Passing data between child components using Vuejs 3.2 for seamless communication within the application

In my chess application, I have a total of 3 components: 1 parent component and 2 child components. The first child component, called Board, is responsible for updating the move and FEN (chess notation). const emit = defineEmits(['fen', 'm ...

javascriptvue.jsvuejs3

What could be causing the show button to change its style every time I click it?

I'm a beginner in the world of JavaScript. I have been working on customizing the "show more" button and encountered an issue. I managed to add text and a down arrow below the button, but when I click it, another button labeled "I don't know how ...

javascriptcssbootstrap-5

"Implementing JavaScript Validation for Textboxes: A Step-by-Step Guide

I need some help with restricting the input of a textbox within a gridview to only 'X' or 'O'. I am not very familiar with javascript, so any guidance on how to accomplish this would be greatly appreciated. It's worth noting that t ...

javascriptjqueryasp.netvb.net

A comprehensive guide on creating a package that combines an href link with an <li> element

I am currently using the <li> tag to display href links. The issue I am facing is that when I click on the 'box,' it does not directly link to another page. Instead, I have to click on the href link for it to redirect to another page. Is th ...

javascripthtmlcss

Store Form Input as JSON Data File

Seeking advice on the optimal method to save submitted form data to a separate file called data.json, for future reference. The form layout is quite basic: <form> <fieldset> <label for="name">Name:</label> &l ...

javascriptjqueryjsonforms

Customize Typography style variations in Material-UI version 5

I have encountered a similar issue, but with a twist from Can't override root styles of Typography from Materil-UI Back in v4, I had a theme set up like this: import { createTheme } from '@material-ui/core/styles'; export const theme = cre ...

cssmaterial-ui

Tips for preventing the unmounting of child components while utilizing JSX's map function

This is a condensed version of a question I previously asked. Hopefully, it's clearer and more comprehensible. Here is a simple application with 3 input fields that accept numbers (disregard the ability to enter non-numbers). The app calculates the s ...

javascriptreactjsunmount

Determining the cursor's location within a textarea element

I am currently working on a React Project and I have a specific functionality in mind. I want to create a feature where as a user types into a Textarea, suggestions will appear in the form of a popover list right next to the cursor position. To implement ...

htmlreactjsmaterial-ui

Comparing arrays in IOS with varying values and lengths: a step-by-step guide

I need help comparing two arrays. Array A contains 4 elements and array B contains 10 elements. I want to determine if any values in array A are also present in array B. Below are the codes I am using for this comparison. for(int i = 0; i <= deepsi ...

iosobjective-carraysif-statement

Styling an HTML table with two columns: one column displaying an image, and the other column containing information related to the image

I have a concept that involves creating a table with 2 columns. The left column will feature an image, while the right column will display data about the image in 6 rows. ________________________________ | |_______________| | | ...

phphtmlcsshtml-table

What is the best way to transfer the API Response Time from one Fetch function to a separate asynchronous function?

After successfully obtaining the API Response Time (duration) using the 'makeAPICall' function, I am now faced with the task of passing this duration variable value to another asynchronous function. Can anyone assist me in finding a solution to a ...

javascripttypescriptapifetch-apitestcafe

Dynamically showing a div using JavaScript and AJAX after changing the window location

After successfully fetching data from the server through AJAX, I am redirecting to the same screen/URL. Is it possible to show/display a div after redirecting using jQuery? $.ajax({ type: "POST", url: action, data: form_data, success: func ...

javascriptjqueryhtmlcssajax