gulp-hide-email

A robust email obfuscation (pseudo-encryption) plugin with the support for streaming and file buffers, perfectly suited for complex gulp tasks. gulp-hide-email automatically detects email links and replaces them with efficient, non-blocking inline JavaScript.

gulp-hide-email can process the most common HTML5 mailto cases including:

<a href="mailto:[e-mail]?subject=Job%20Application">Apply now</a>

which after processing becomes,

<span id="">
  <script>document.getElementById("").innerHTML='<n uers="znvygb:[e-mail]?fhowrpg=Wbo%20Nccyvpngvba">Nccyl abj</n>'.replace(/[a-zA-Z]/g,function(c){return String.fromCharCode((c<="Z"?90:122)>=(c=c.charCodeAt(0)+13)?c:c-26);});
  </script>
</span>

gulp-hide-email is perfectly suited for heavily nested cases with multiple DOM elements in-between the <a>...</a> e.g.

<a href="mailto:[e-mail]?subject=Job%20Application">
  <span id="something" class="x1 x2 x3" style="padding-bottom: -20px;">
    <div>Test</div>
  </span>
</a>

The resultant JavaScript is efficient and unobtrusive, hence you should not observe any noticeable drop in the rendering performance, nor a render-blocking behavior.

Please check http://www.tamiola.com for working demo. Multiple mailto: instances have been effectively processed on our page.

Usage

First, install gulp-hide-email as a development dependency:

npm install --save-dev gulp-hide-email

Then, add it to your gulpfile.js.

Email obfuscation

This is an example workflow with the human-readable (verbose:true) output, so you can monitor what goes into gulp-hide-email.

var obfuscateEmail = require('gulp-hide-email');
 
gulp.task('obfuscate', function(){
  gulp.src(['index.html'])
    // Obfuscate Block
    .pipe(obfuscateEmail({verbose: true}))
    // End of Obfuscate Block
    .pipe(gulp.dest('build/index.html'));
});

API

gulp-hide-email accepts options in a form of a typical JSON Object.

options

Type: Object

options.idPrefix

Type: string
Default: null

Generate custom DOM id tags, labeled in a sequential order for the inline JavaScript code. This option may come in handy, when you want to do some extra operations on the "injected" JavaScript code, and need to know the DOM id tags a priori. By default, gulp-hide-email generates random labels.

.pipe(obfuscateEmail({ idPrefix:"obfuscate_" }))

will yield,

<span id="obfuscate_1"><script>document.getElementById("obfuscate_1").innerHTML='<!---OBFUSCATED CODE--->'.replace(/[a-zA-Z]/g,function(c){return String.fromCharCode((c<="Z"?90:122)>=(c=c.charCodeAt(0)+13)?c:c-26);});</script></span>

options.verbose

Type: boolean
Default: false

Produce detailed output from obfuscation. Useful for debugging and supervision, especially when you deal with multiple mailto: instances and you want to see what went into gulp-hide-email.

.pipe(obfuscateEmail({ verbose:true }))

options.test

Type: boolean
Default: false

Disable automated generation of DOM id elements. (This option is implemented only for testing purposes, and should be set to false in all gulp production scripts.)