Some UX feedback from a dumb user: I spent a few minutes thinking there wasn't any preview. Finally I noticed the "Apply" button way down at the bottom --- and the "Auto" checkbox next to it. Maybe the "Auto" checkbox should be enabled by default.

Once I figured that out: Awesome.

THIS.

I never noticed the "Apply" button, and I'm not on the page anymore.

I would guess that a significant proportion of users will quickly figure out the page does NOT auto-update and walk away having wasted time, never seen it work.

Like I did.

Hi, yes it's true. The issue that we are facing with the auto checkbox is that we need to recompile all the time, the whole bootstrap so it 's a kind of slow. We will look for a solution for the next version.

One suggestion would be to use timeouts to add a delay to the input event handler, so it would wait until the typing has stopped for a while rather than recompiling on every key press. That's just a line or two of extra js and should make the auto updating vastly more usable.

yeh, good suggestion, we just added your advice. There are a lot to parse with Bootstrap ... still thinking about making it lighter

make the Apply button flash on and off with a CSS animation?

Digging the idea and I like the Apply feature.

However, I have no idea what your JS is doing but it spiked my browser CPU usage to 100% on a core and made the whole thing fairly unresponsive until I closed that tab.

Same here with Firefox unfortunately, making it essentially unusable.

Pretty nice. But I think it needs better generality in values – more references to other variables, and color functions. If I make my primary brand color the light yellow #faf332 and the link color a very dark yellow, there are a lot of places on the page that still have unreadable white text on a yellow background, such as @btn-primary-color (which I set to #111) and @pagination-active-color (which I set to @link-color). Those values should use some function of @link-color or another variable as their default value. And colors should use appropriate functions to choose a light or dark color that maximizes contrast against their background.

Really cool, but slow. AngularJS Batarang might help profile the hot spots.

Yeh definetely, we just update a new version. It is faster now.

It is indeed faster but I am sorry to say that this is a good example of "How to not develop an angular app".

DOM manipulation in a controller is something you can't do and who says controllers, says services too.

On the other hand, the double ng-repeat could be a hot spot for the bad performance.

Don't get me wrong, the app is awesome, awesome idea but the implementation doesn't respect the angular way so it is really slow.