# Fixed a JavaScript TypeError

## Background

I included an image with changeable size in a post written about two months ago.

### How/Why does this work?

• In brief: View /javascripts/svg-resize-bar.js.
• For details: click the hyperlink above.

## Problem

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When I browsed any pages except that post which contains the changeable SVG image, the above TypeError was thrown.

## Solution

From the error message TypeError: bar is null and the filename svg-resize-bar.js on the right, an ordinary user who knows how to write if-else statements should be able to solve this in a few seconds: surround the part bar.onchange = function () { ... } by the if-else statement if (bar != null ) { ... }.