CSS | overscroll-behavior-y Property

Last Updated : 18 Nov, 2019

The overscroll-behavior-y property is used to set the behavior of the browser when the vertical boundary of a scrolling area is reached. This can be used in websites where there are multiple scrolling areas and scrolling one area does not affect the page as a whole. This effect is known as scroll-chaining that can be enabled or disabled accordingly.

Syntax:

overscroll-behavior-y: auto | contain | none | initial | inherit

Property Values:

auto: This is used to set the scrolling behavior to default on all the elements. The whole page will scroll even if the boundary of the element is reached. It is the default value.

Example:

<!DOCTYPE html>
<html>
  
<head>
  <title>
    CSS | overscroll-behavior-y
  </title>
  
  <style>
    .container {
      display: flex;
    }
  
    .main-content {
      width: 200px;
      background-color: lightgreen;
    }
  
    .smaller-box {
      overscroll-behavior-y: auto;
  
      height: 100px;
      width: 125px;
      margin: 25px;
      overflow-y: scroll;
    }
  </style>
</head>
  
<body>
  <h1 style="color: green">
    GeeksforGeeks
  </h1>
  
  <b>CSS | overscroll-behavior-y</b>
  <p>overscroll-behavior-y: auto</p>
  
  <div class="container">
    <div class="main-content">
      GeeksforGeeks is a computer science
      portal with a huge variety of well
      written and explained computer science
      and programming articles, quizzes and
      interview questions. The portal also
      has dedicated GATE preparation and
      competitive programming sections.<br><br>
      GeeksforGeeks is a computer science
      portal with a huge variety of well
      written and explained computer science
      and programming articles, quizzes and
      interview questions. The portal also
      has dedicated GATE preparation and
      competitive programming sections.
    </div>
    <div class="smaller-box">
      This is a smaller element that is also
      scrollable. The overscroll behavior
      can be used to control if the main
      content behind would scroll when this
      element's vertical boundary is reached.
    </div>
  </div>
</body>
  
</html>

Output: Scrolling down on the smaller element
auto

contain: It is used to set the scrolling behavior to default only on the element used. No scroll-chaining would occur on the neighboring scrolling areas and the elements behind will not scroll.

Example:

<!DOCTYPE html>
<html>
  
<head>
  <title>
    CSS | overscroll-behavior-y
  </title>
  
  <style>
    .container {
      display: flex;
    }
  
    .main-content {
      width: 200px;
      background-color: lightgreen;
    }
  
    .smaller-box {
      overscroll-behavior-y: contain;
  
      height: 100px;
      width: 125px;
      margin: 25px;
      overflow-y: scroll;
    }
  </style>
</head>
  
<body>
  <h1 style="color: green">
    GeeksforGeeks
  </h1>
  
  <b>CSS | overscroll-behavior-y</b>
  <p>overscroll-behavior-y: contain</p>
  
  <div class="container">
    <div class="main-content">
      GeeksforGeeks is a computer science
      portal with a huge variety of well
      written and explained computer science
      and programming articles, quizzes and
      interview questions. The portal also
      has dedicated GATE preparation and
      competitive programming sections.<br><br>
      GeeksforGeeks is a computer science
      portal with a huge variety of well
      written and explained computer science
      and programming articles, quizzes and
      interview questions. The portal also
      has dedicated GATE preparation and
      competitive programming sections.
    </div>
    <div class="smaller-box">
      This is a smaller element that is also
      scrollable. The overscroll behavior
      can be used to control if the main
      content behind would scroll when this
      element's vertical boundary is reached.
    </div>
  </div>
</body>
  
</html>

Output: Scrolling down on the smaller element
contain

none: It is used to prevent scroll-chaining on all elements. The default scroll overflow behavior is also prevented.

Example:

<!DOCTYPE html>
<html>
  
<head>
  <title>
    CSS | overscroll-behavior-y
  </title>
  
  <style>
    .container {
      display: flex;
    }
  
    .main-content {
      width: 200px;
      background-color: lightgreen;
    }
  
    .smaller-box {
      overscroll-behavior-y: none;
  
      height: 100px;
      width: 125px;
      margin: 25px;
      overflow-y: scroll;
    }
  </style>
</head>
  
<body>
  <h1 style="color: green">
    GeeksforGeeks
  </h1>
  
  <b>CSS | overscroll-behavior-y</b>
  <p>overscroll-behavior-y: none</p>
  
  <div class="container">
    <div class="main-content">
      GeeksforGeeks is a computer science
      portal with a huge variety of well
      written and explained computer science
      and programming articles, quizzes and
      interview questions. The portal also
      has dedicated GATE preparation and
      competitive programming sections.<br><br>
      GeeksforGeeks is a computer science
      portal with a huge variety of well
      written and explained computer science
      and programming articles, quizzes and
      interview questions. The portal also
      has dedicated GATE preparation and
      competitive programming sections.
    </div>
    <div class="smaller-box">
      This is a smaller element that is also
      scrollable. The overscroll behavior
      can be used to control if the main
      content behind would scroll when this
      element's vertical boundary is reached.
    </div>
  </div>
</body>
  
</html>

Output: Scrolling down on the smaller element
none

initial: It is used to set the overscroll behavior to default value.

Example:

<!DOCTYPE html>
<html>
  
<head>
  <title>
    CSS | overscroll-behavior-y
  </title>
  
  <style>
    .container {
      display: flex;
    }
  
    .main-content {
      width: 200px;
      background-color: lightgreen;
    }
  
    .smaller-box {
      overscroll-behavior-y: initial;
  
      height: 100px;
      width: 125px;
      margin: 25px;
      overflow-y: scroll;
    }
  </style>
</head>
  
<body>
  <h1 style="color: green">
    GeeksforGeeks
  </h1>
  
  <b>CSS | overscroll-behavior-y</b>
  <p>overscroll-behavior-y: initial</p>
  
  <div class="container">
    <div class="main-content">
      GeeksforGeeks is a computer science
      portal with a huge variety of well
      written and explained computer science
      and programming articles, quizzes and
      interview questions. The portal also
      has dedicated GATE preparation and
      competitive programming sections.<br><br>
      GeeksforGeeks is a computer science
      portal with a huge variety of well
      written and explained computer science
      and programming articles, quizzes and
      interview questions. The portal also
      has dedicated GATE preparation and
      competitive programming sections.
    </div>
    <div class="smaller-box">
      This is a smaller element that is also
      scrollable. The overscroll behavior
      can be used to control if the main
      content behind would scroll when this
      element's vertical boundary is reached.
    </div>
  </div>
</body>
  
</html>