JavaScript Reference

Quick Reference

The Window focus() method sets focus to a window.

The focus() method is often used in a function and called by clicking a button, which would open a new window with focus.

let my_window = window.open('', '', 'width=400, height=400');
my_window.focus();

Note

Modern browsers are usually setup to open new windows as tabs. Therefore many of the JS methods used to open, close, resize, etc. browser “windows” may not work as expected.

Output

(no page output, but a new window is opened)

Syntax

window.focus()

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.