LogoJS: Embeddable SVG Sequence Logos

LogoJS is a Javascipt package for creating SVG sequence logos. In addition to basic DNA, RNA, and protein logos, we support custom alphabets and variety of advanced logo types and custom annotations.

LogoJS can be used with and without ReactJS. A companion web app makes it easy to share SVG logos and generate them in batches from the output of common tools such as the MEME Suite.

Examples

LogoJS supports a wide range of biological use cases. Detailed examples with code samples are available in this documentation and through our companion site. Shown below are protein, RNA, methyl DNA, dinucleotide, and protein/DNA interaction logos.

RNA logo   methyl DNA logo   dinucleotide logo   negative letter heights
DNA and RNA logos

protein logo
protein logo

SNP annotation             Protein/DNA logo
advanced annotations

Using in your web application

You can add LogoJS to your project using NPM or Yarn: 

yarn add logojs-react
or 
npm install logojs-react

If you want to use LogoJS in a static web page, you can simply include the package with a static script tag, which will add LogoJS to the global namespace as logojs:

<script src="http://bundle.logojs.wenglab.org/bundle.js" type="text/javascript">
</script>

The transcription factor CTCF binds a well-known consensus DNA sequence, rendered below with LogoJS:

CTCF logo

If you use ReactJS, the following code creates the CTCF consensus binding logo:

import { DNALogo } from 'logojs-react';

const CTCF_PPM = [
  [0.09, 0.31, 0.08, 0.50], [0.18, 0.15, 0.45, 0.20], [0.30, 0.05, 0.49, 0.14],
  [0.06, 0.87, 0.02, 0.03], [0.00, 0.98, 0.00, 0.02], [0.81, 0.01, 0.07, 0.09], 
  [0.04, 0.57, 0.36, 0.01], [0.11, 0.47, 0.05, 0.35], [0.93, 0.01, 0.03, 0.01],
  [0.00, 0.00, 0.99, 0.01], [0.36, 0.00, 0.64, 0.00], [0.05, 0.01, 0.55, 0.37], 
  [0.03, 0.00, 0.97, 0.00], [0.06, 0.00, 0.85, 0.07], [0.11, 0.80, 0.00, 0.07],
  [0.40, 0.01, 0.55, 0.01], [0.09, 0.53, 0.33, 0.04], [0.12, 0.35, 0.08, 0.43], 
  [0.44, 0.19, 0.29, 0.06]
];

export const CTCFLogo = props => (
    <DNALogo ppm={CTCF_PPM} />
);

If you don’t use React, the following code embeds the DNA logo in a div element:

<!doctype html>
<html>
  <body>
    <script src="http://bundle.logojs.wenglab.org/bundle.js" type="text/javascript"></script>
    <div id="logo" style="width:500px"></div>
    <script type="text/javascript">
      const CTCF_PPM = [
        [0.09, 0.31, 0.08, 0.50], [0.18, 0.15, 0.45, 0.20], [0.30, 0.05, 0.49, 0.14],
        [0.06, 0.87, 0.02, 0.03], [0.00, 0.98, 0.00, 0.02], [0.81, 0.01, 0.07, 0.09], 
        [0.04, 0.57, 0.36, 0.01], [0.11, 0.47, 0.05, 0.35], [0.93, 0.01, 0.03, 0.01],
        [0.00, 0.00, 0.99, 0.01], [0.36, 0.00, 0.64, 0.00], [0.05, 0.01, 0.55, 0.37], 
        [0.03, 0.00, 0.97, 0.00], [0.06, 0.00, 0.85, 0.07], [0.11, 0.80, 0.00, 0.07],
        [0.40, 0.01, 0.55, 0.01], [0.09, 0.53, 0.33, 0.04], [0.12, 0.35, 0.08, 0.43], 
        [0.44, 0.19, 0.29, 0.06]
      ];
      logojs.embedDNALogo(document.getElementById("logo"), { ppm: CTCF_PPM });
    </script>
  </body>
</html>