JavaScript Reference
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Quick Reference

The Element clientWidth property returns the viewable width of an element, including padding, but not the border, scrollbar or margin.

<!-- html element to place output -->
<p id="my_output" style="width: 200px;"></p>
// variables
let my_element = document.getElementById('my_output');
let my_text = 'clientWidth: ' + my_element.clientWidth + 'px<br>';

// output to the HTML element
document.getElementById('my_output').innerHTML = my_text;

Output

clientWidth: 200px

Syntax

element.clientWidth

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)
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