There are different methods to scroll HTML document using JavaScript, You can scroll the document to Top, Bottom or in any part or to view a...
There are different methods to scroll HTML document using JavaScript, You can scroll the document to Top, Bottom or in any part or to view any element in the document using JavaScript.
To scroll the document using JavaScript, there is a scrollTo() method in window object which takes the X and Y coordinates of a point and sets these as the scrollbar offsets.
The scrollTo() method scrolls the window so that the specified point is in the upper left corner of the view-port. If you specify a point that is too close to the bottom or too close to the right edge of the document, the browser will move it as close as possible to the upper left corner.
How to Scroll Bottom of Document Using JavaScript
You can use the following set of JavaScript codes that scroll the browser to the bottom most page of the document.
var documentHeight=documentElement.offsetHeight;
var viewportHeight=window.innerHeight;
window.scrollTo(0, documentHeight-viewportHeight);
Here the first variable documentHeight specifies the read only offsetHeight properties of any HTML element return its on screen height, in CSS pixels and the returned size include the element border and padding but not margin.
And the second variable, viewportHeight specifies the height of viewport, which is obtained from innerHeight property of window object.
You can execute this code on onclick event of JavaScript hyperlink or on onclik event of any button or text as given below.
function gobottom(){
var documentHeight=document.documentElement.offsetHeight;
var viewportHeight=window.innerHeight;
window.scrollTo(0,documentHeight-viewportHeight);
}
You can call this function gobottom() within HTML file as below.
<input type="button" value="Go To Bottom" onclick="gobottom();">
On the other way, you can execute onclick event of button with assigning a function on onload event of window as below.
<script>
window.onload=function(){
var bottom=document.getElementById('bottom');
bottom.onclick=function(){
var documentHeight=document.documentElement.offsetHeight;
var viewportHeight=window.innerHeight;
window.scrollTo(0,documentHeight-viewportHeight);}
</script>
You can call this function by placing id attribute within HTML file as below.
<input type="button" value="Go To Bottom" id="bottom">
Preview:
How to Scroll Top of Document Using JavaScript
You can use the following JavaScript code that scroll the browser to the top most page of the document.
window.scroll(0,0);
You can execute this code on onclick event of JavaScript hyper-link or on onclick event of any button or text as given below.
<script>
window.onload=function(){
var top=document.getElementById('top');
top.onclick=function(){window.scrollTo(0,0);}
</script>
You can call this function by placing id attribute within HTML file as given below.
<input type="button" value="Go To Top" id="top">
Preview:
How to Scroll Document Automatically Using JavaScript
You can scroll the document automatically using scrollBy() method which is similar to scroll() and scrollTo(), but its arguments are relative and are added to the current scrollbar offsets.
For example, you can use the following code to scroll 10 pixels down every 200ms.
javascript:void setInterval(function(){scrollBy(0,10)}, 200);
How to Scroll Document to View Certain Element Using JavaScript
Instead of scrolling to a numeric location in document, you can just scroll that a certain element in the document is visible. It can be done easily scrollIntoView() method on the desired HTML element and this method insures that the element on which it is invoked is visible in the viewport.
By default, the scrollIntoView() method tries to put the top edge of the element at or near the top of the viewport. The browser will also scroll the viewport horizontally as needed to make the element visible.
Related Search Terms
Related Posts:
How to Show Pop Up Window Using JavaScript
How to go Back Browsing History Using JavaScript
How to Click Button Using JavaScript?
How to Write JavaScript Function as URL in Hyperlink?
How to use Round, Random, Min and Max in JavaScript
How to Concatenate, Join and Sort Array in JavaScript?
How to Loop Through JavaScript Array?
How to Loop using JavaScript?
How to Show Pop Up Boxes Using JavaScript?
How to Write Conditional Statements in JavaScript?
How to Write JavaScript With HTML?
How to create Changeable Date and Time Using JavaScript?
How to Validate a HTML Form Using JavaScript?
How to create a simple form using HTML?
How to Create JavaScript Image Sideshow with Links
How to Display Date Format in JavaScript?
How to Validate a HTML Form Using JavaScript?
What are the Different Ways to Redirect Page in JavaScript?
How to create Timer Using JavaScript?
How to make rounded corners border using CSS
How to Create Custom CSS Template for Printing
How to create a simple form using HTML?