svg-exportJS 
An easy-to-use client-side Javascript library to export SVG graphics from web pages and download them as an SVG file, PDF, or raster image (JPEG, PNG) format. Written in plain vanilla javascript. Originally created to export D3.js charts.
This library features:
- Exporting SVG DOM Element objects or serialized SVG string to SVG file, PNG, JPEG, PDF
- Setting custom size for exported image or graphic
- High resolution raster image, using
scale - Including external CSS styles in SVG
- Exporting text in custom embedded fonts
- Handling transparent background for JPEG format conversion
- Exporting SVGs that are hidden on the DOM (
display: none, SVGs in hidden modals, dropdowns or tabs, etc.) - Exporting SVGs containing images (
<image>tag)
Demo available here.
Getting Started
Prerequisites
- Any of the following browsers: Chrome 38.0+, Edge 18.0+, Firefox 20.0+, Safari 10.1+, Opera 25+
- Canvg (if you need JPEG/PNG export)
<script src="https://cdnjs.cloudflare.com/ajax/libs/canvg/3.0.7/umd.min.js"></script>
- PDFKit, blob-stream and SVG-to-PDFKit (if you need PDF export).
<script src="https://cdn.jsdelivr.net/npm/[email protected]/js/pdfkit.min.js"></script> <script src="https://github.com/devongovett/blob-stream/releases/download/v0.1.3/blob-stream.js"></script> <script src="https://cdn.jsdelivr.net/npm/[email protected]/source.min.js"></script>
Please note that the CDNs above may not be the most up-to-date. The latest source code can be found directly from the github projects, also linked above.
Installation
Either download the plugin and save it in your project, or use script-tags in your html files using the hosted url.
- Download the plugin
svg-export.min.jsfrom this repo, and add it to your project. - Add the plugin using the file hosted on Github Pages. Place the script within the
<head>tag in your html files (place prerequisites first):<!-- svg-exportJS prerequisite: canvg --> <script src="https://unpkg.com/[email protected]/lib/umd.js"></script> <!-- svg-exportJS plugin --> <script src="https://sharonchoong.github.io/svg-exportJS/svg-export.min.js"></script>
Usage
Given the <svg> element:
<svg id="mysvg">...</svg>
In Javascript:
svgExport.downloadSvg(
document.getElementById("mysvg"), // SVG DOM Element object to be exported. Alternatively, a string of the serialized SVG can be passed
"chart title name", // chart title: file name of exported image
{ width: 200, height: 200 } // options (optional, please see below for a list of option properties)
);
svgExport.downloadPng("<svg id=\"mysvg\"></svg>", "chart title name", {
width: 200,
height: 200,
});
svgExport.downloadJpeg(svgElementObject, "chart title name");
svgExport.downloadPdf(svgString, "chart title name");
See index.html for an example of how to use.
Options
- width (number) : the width of the resulting image exported, in pixels. Default is the SVG's width on the DOM
- height (number) : the height of the resulting image exported, in pixels. Default is the SVG's height on the DOM
- scale (number) : a multiple by which the SVG can be increased or decreased in size. For PNG and JPEG exports, if width, height and scale are not specified, scale is set to
10for a 10x enlargement to ensure that a higher resolution image is produced. Otherwise, the default scale is1 - useCSS (bool): if SVG styles are specified in stylesheet externally rather than inline, setting
truewill add references to such styles from the styles computed by the browser. If useCSS isfalse,currentColorwill be changed toblack. This setting only applies if the SVG is passed as a DOM Element object, not as a string. Default istrue - transparentBackgroundReplace (string): the color to be used to replace a transparent background in JPEG format export. Default is
white - allowCrossOriginImages (bool): If the SVG contains images, this option permits the use of images from foreign origins. Defaults to
false. Please read Images within SVG below for more detail. - pdfOptions
- pageLayout (object): e.g.
{ margin: 50, layout: "landscape" }. This is provided to PDFKit'saddPage. When the options width and height are not specified, a minimum size of 300x300 is used for the PDF page size; otherwise the page size wraps around the SVG size. Please see the PDFKit documentation for more info - addTitleToPage (bool): Default is
true - chartCaption (string) caption to appear at the bottom of the chart in the PDF. Default is no caption
- pdfTextFontFamily (string): Font family of title and caption (if applicable) in PDF. See here for a list of available fonts. Default is
Helvetica - pdfTitleFontSize (number): Default is
20 - pdfCaptionFontSize (number): Default is
14 - customFonts (array of objects): Optional argument for custom fonts. e.g.
[{ fontName: 'FakeFont', url: 'fonts/FakeFont.ttf'}]. Each object must have two properties:fontNamefor the font name that appears in the CSS/SVG, andurlfor the URL of the custom font file to be used in the PDF. A third propertystyleNamespecifying the style name to be used can be specified for multi-collection font files (.ttc and .dfont files)
- pageLayout (object): e.g.
Custom fonts
Regarding embedded custom fonts used in the SVG element (using @font-face for example), please note that for SVG export, custom fonts only show correctly if the system opening the SVG file has the font installed. If this is not possible, please consider using one of the other file formats available.
Images within SVG
This library supports exporting SVGs that contain images in an <image> tag. If you need to export such SVGs to raster images or PDFs, please make sure that you have the latest version of Canvg and SVG-to-PDFKit. If the images' href are external, the allowCrossOriginImages option must be set to true, and the image servers must be configured with the 'Access-Control-Allow-Origin' CORS policy.
Colors
Colors tested to work on all exported formats include CSS color names, HEX, RGB, RGBA and HSL.
SVG graphics in Office documents
Need to add SVG graphics to Office Word, Excel or Powerpoint presentations? SVG files can be inserted as a picture for non-pixelated graphics in Office 2016 or later, including Office 365.
Roadmap
- Set up package.json and publish to npm (jsdom for Node?)
Not Supported
Since foreignObject does not contain SVG, it is not supported.
Contributing
Contributions are very welcome! Feel free to flag issues or pull requests.
License
Licensed under MIT. See LICENSE for more information.
Contact
Sharon Choong - https://sharonchoong.github.io/
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