var offlineFileExists = function(url) {

    const fs = require("fs"); // Or `import fs from "fs";` with ESM

    return fs.existsSync(url.replace("chrome-extension://"+location.host+"/",""));

}

$(document).ready(function () {

    var win = nw.Window.get();

    if (dm) {

        win.showDevTools();

    }

});