Quick Reference
The window.scrollBy() method scrolls the document by the specified number of pixels, but only if the page is longer than the window.
The following would usually be placed in a function and called on the click of a button so that the user could scroll the page.
Scroll Vertically:
// scroll vertically
window.scrollBy(0, 100);Scroll Horizontally:
// scroll horizontally
window.scrollBy(100, 0);Output
(no output; the window just scrolls)Syntax
window.scrollBy(x, y)
// or
scrollBy(x, y)Parameters
| Parameter | Description |
|---|---|
| x | Number of pixels to scroll horizontally; positive values scroll to the right, negative values to the left (required) |
| y | Number of pixels to scroll vertically; positive values scroll down, negative values scroll up (required) |
JavaScript Notes:
- When using JavaScript, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent
- JavaScript is a case-sensitive language; firstName is NOT the same as firstname
- Arrays count starting from zero NOT one; so item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on
- JavaScript variables must begin with a letter, $, or _
- JavaScript variables are case sensitive (x is not the same as X)
We’d like to acknowledge that we learned a great deal of our coding from W3Schools and TutorialsPoint, borrowing heavily from their teaching process and excellent code examples. We highly recommend both sites to deepen your experience, and further your coding journey. We’re just hitting the basics here at 1SMARTchicken.