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+---
+title: "About"
+description: "Learn about html2canvas, how it works and some of its limitations"
+nextUrl: "/getting-started"
+nextTitle: "Getting Started"
+---
+
+Before you get started with the script, there are a few things that are good to know regarding the 
+script and some of its limitations.
+
+## Introduction
+The 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.
+
+## How it works
+The script traverses through the DOM of the page it is loaded on. It gathers information on all the elements
+there, which it then uses to build a representation of the page. In other words, it does not actually take a
+screenshot of the page, but builds a representation of it based on the properties it reads from the DOM.
+            
+            
+As a result, it is only able to render correctly properties that it understands, meaning there are many 
+CSS properties which do not work. For a full list of supported CSS properties, check out the 
+[supported features](/features/) page.
+
+## Limitations
+All the images that the script uses need to reside under the [same origin](http://en.wikipedia.org/wiki/Same_origin_policy) 
+for it to be able to read them without the assistance of a [proxy](/proxy/). Similarly, if you have other `canvas` 
+elements on the page, which have been tainted with cross-origin content, they will become dirty and no longer readable by html2canvas.
+
+The script doesn't render plugin content such as Flash or Java applets.
+
+## Browser compatibility
+
+The library should work fine on the following browsers (with `Promise` polyfill):
+ - Firefox 3.5+
+ - Google Chrome
+ - Opera 12+
+ - IE9+
+ - Edge
+ - Safari 6+