convert svg to png javascript

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FAQ

What would be your best scalability advice for a hypothetical website that is growing rapidly?
As UXD you have quite a lot of scope to influence scalability. The most important steps you can take are to minimise the number of HTTP requests (client latency AND server load) and the size of the data returned (latency and band both across the internet and within your server network and between your (micro)services). To achieve this from the UI the important point is to reduce the amount of UI state (e.g. content) that you need to retrieve as follows bine requests - for example ask for page-able batch APIs from the server API rather than a one-by-one API maximise your smart markup - use Javascript (e.g. ) and CSS behaviour especially within a single-page application cache well - use HTTP cache headers cache request state (e.g. objects from HTTP-served JSON) press well - minify your JS don your JSON gzip your HTTP use scalable in multiple sizes serve in SVG and use a HTML canvas to convert to PNG in the browser Doing any of the above will make a big difference - doing all of them will make your app stand head-and-shoulders overpeting apps.
Does D3.js work efficiently on massive amounts of data (200 million rows with at least a dozen columns)?
If you are looking for a web solution for visualizing large dataset without installing any apps D3 and other svg output based visualizing libraries will fail to give you performance. Problem with such libraries is due to the fact the svg DOM elements eat too much of RAM. As a result even on being served on robust servers these apps hog on the client's RAM like a leech ultimately causing DOMs to break or the browser to crash. A better alternative is Canvas based libraries or if you are good at basics JS and PHP itself can be coded for canvas. Good point is Canvas itself is treated as single DOM and hence single page code hosted in minimal ram server can host good apps if client dont have very low RAM (nothing works at low RAM). Except that there is a possibility that canvas will still run on such low RAMs. PLUS there are opotions to convert them to PNG one is ( Canvas2PNG s ) library. Cons are canvas isnt vector. So if you at some point think that you need to resize your chart you have to recode and believe me its much longer coding than svg. Several JS library based on canvas. 1. Beautiful HTML5 JavaScript Charts | CanvasJS CanvasJS Charts have a simple API and can render across devices including iPhone iPad Android Windows Phone Desktops etc. This allows you to create rich dashboards that work across devices withoutpromising on maintainability or functionality of your web application. Graphs include several good looking themes and are 1x faster than conventional Flash SVG based Charting Libraries 3 resulting in lightweight beautiful and responsive dashboards. 2. RGraph 2D JavaScript charts Free and Open Source Software It's a JavaScript charts library that produces the charts dynamically with JavaScript and the HTML5 canvas tag. It can generate lots of different kinds of visualisations from Bar charts and Line charts through to Meters and Progress bars. RGraph is quick attractive easy to use and free formercial use . Built on the widely supported canvas element desktop and mobile support is excellent and that allows you to create charts and dashboards that you can use on a wide range of devices. Owing to the fast rendering of the canvas tag your charts can be up to 1x faster than Flash or SVG based libraries. This means you can create good looking and informative charts and dashboards. 3. Smoothie Charts- A JavaScript Charting Library for Streaming Data 4. CanvasXpress CanvasXpress is a standalone HTML5 graphing library written in Javascript that includes a simple and unobtrusive user interfase to exploreplex data sets. CanvasXpress is supported in all major browsers inputers and mobile devices. 5. AwesomeChartJS s AwesomeChartJS is a simple Javascript library that can be used to create charts based on the HTML 5 canvas element. The main goal during development was to pick sane defaults in order to let the user create simple charts quickly with just a couple of lines of code. One can create at almost no time bar pie doughnut and Pareto charts. 6. Flotcharts- Attractive JavaScript plotting for jQuery Flot is a pure JavaScript plotting library for jQuery with a focus on simple usage attractive looks and interactive features.
How do I convert a DIV into a PNG with JavaScript?
Original question How do I convert a DIV into a PNG with JavaScript? question qid 41234259 There are a few libraries to do that but I rmend a way to do it without any third-party library as discussed in this thread Render HTML to an . Please note a few things The HTML inside the SVG must be XHTML For security reasons the SVG as data URL of an it will draw onto the canvas correctly. But the actual cannot be measured from that image. A fixed solution will work just fine but dynamic will require a bit more work. The best is to render the SVG data into an