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I am currently developing a drag and drop interface for a course builder. Courses are split into lessons and lessons into slides. While switching between slides, I wanted to have a small thumbnail representing the current slide content.

One option would have been to use something like PhantomJS / CasperJS.  A headless browser , to take a screenshot of the slide. I have done that in the past and it works perfectly.

This time, I decided to go with another solution, that allows me to convert html to a canvas element.

The project is called html2canvas (GitHub).

„This script allows you to take screenshots of webpages or parts of it, directly on the users browser. The screenshot is based on the DOM and as such may not be 100% accurate to the real representation as it does not make an actual screenshot, but builds the screenshot based on the information available on the page.“

EXAMPLE

CANVAS TO BACKGROUND IMAGE

I have a slide container (#slideContainer), that holds the active slide for editing and a thumb navigation to switch between slides (.slide.thumb).

When switching between slides, I am doing a snapshot of the current slideContainer and add it as a new background image to the thumb navigation item for that slide. This is done with canvas.toDataURL() and by embedding the resulting image  using a data: url.

Works perfectly. html2canvas has no full css support, so the output will not always match 100%, but its close enough to get a glimpse of what is stored per slide ;)

html2canvas
PhantomJS
CasperJS

Enjoy coding …

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Background Blur plugin is a cross browser jQuery plugin for blurring images.

Demo + GitHub

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Nice set of icons from Github.

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jquery.Stacky makes it easy to create UIs with panels that open horizontally using jQuery.

GitHub

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„Mosaico is a JavaScript library (or maybe a single page application) supporting the editing of email templates.

The great thing is that Mosaico itself does not define what you can edit or what styles you can change: this is defined by the template.

This makes Mosaico very flexible.“

GitHub

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Enter a few numbers and GuideGuide will draw a grid on your document using Photoshop’s guides.

It helps, if a website needs multiple columns and gutters. Especially fun, when working with grid based frameworks like Bootstrap.

You can give it try feely, but the investment of $10 is worth it :)

GuideGuide

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Free mini iconset from Squid Ink in PSD / AI / EPS / PNG / SVG format.

Squid Ink

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Chocolat.js enables you to display one or several images on the same page. You can group images via a link  or use thumbnails.

The viewer can display images in full-page or in a block mode. The setup is responsive and only 10kb small in minified form.

Chocolat.js

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Simple way to do some Visual Composer Grid cleanup, when you are using Bootstrap within your theme. This removes and cleans up classes.

Visual Composer for WordPress
Bootstrap / Bootstrap Sass

Enjoy coding …

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gridstack.js is a jQuery plugin for widget layouts. It allows you to build draggable responsive bootstrap v3 friendly layouts. “

Demo @ Github

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