White-space and character 160

I came across a problem in Internet Explorer (it wasn’t a problem with Firefox) when I was trying to compare two strings. To me, one string looked to have an extra space in the front. No problem, I’ll just call the jQuery trim function. Well, that didn’t work. So I used charCodeAt and found it was ASCII character 160. I looked up char code 160 and saw that it is a “Non-breaking space”. You would think that a “space” character would be trimmed. I looked at the jQuery code that does the trimming and the grep pattern uses \s. So, evidently you can’t use \s to catch the “Non-breaking space” in IE. I wonder why no one else has seen this. I wrote up a test page to illustrate this.

To create the non-breaking space, you can use String.fromCharCode(160) or the Unicode representation “\u00A0”. “ ” doesn’t seem to work when using regular expressions, although it behaves the same when printed.

Browser Evaluates character 160 as white-space
Firefox 3, 3.5 Yes
Chrome 3.0 Yes
Internet Explorer 7, 8 No
Safari 3.2 No
Opera 9 Yes


Unicode character 2026 – “Horizontal Ellipsis”

In Windows: Alt-0133

In Java: \u2026
String ellipsis = "\u2026";

In HTML: … or … or …
… or … or …

In Javascript: \u2026
var ellipsis = "\u2026";

Ricola log: \u2026
will output 11:31:08 DEBUG - …

Ricola showPleaseWait: any of the HTML entities: … or … or …
Ricola.page.showPleaseWait("Creating train documents…");