This piece of code will scan for all files in a directory, then read the contents of .html files and then look for a string data-template=home in them.

var fs = require('fs');



fs.readdir('/path/to/html/files', function(err, files) {

    files

         .filter(function(file) { return file.substr(-5) === '.html'; })

         .forEach(function(file) { fs.readFile(file, 'utf-8', function(err, contents) { inspectFile(contents); }); });

});



function inspectFile(contents) {

    if (contents.indexOf('data-template=home') != -1) {

        // do something

    }

}

If you need more flexibility, you could also use the cheerio module to look for an element in the html file with that attribute:

var cheerio = require('cheerio');



function inspectFile(contents) {

    var $ = cheerio.load(contents);



    if ($('html[data-template=home]').length) {

        // do something

    }

}