Read config.json with the Web File API

read-config.js

function readFile(filepath, callback) {
    window.requestFileSystem(
        LocalFileSystem.PERSISTENT,
        0,
        function(fileSystem) {
            fileSystem.root.getFile(
                filepath,
                null,
                function gotFileEntry(fileEntry) {
                    fileEntry.file(
                        function gotFile(file){
                            var reader = new FileReader();
                            reader.onloadend = function(evt) {
                                callback(null, evt.target.result); // text
                            };
                            reader.readAsText(file);
                        },
                        function(error) {
                            callback(error);
                        }
                    );
                },
                function(error) {
                    callback(error);
                }
            );
        },
        function(error) {
            callback(error);
        }
    );
}

// use it
readFile('config.json', function(e, text) {
  var config = (text) ? JSON.parse(text) : {};
  
  console.log(config.URL);
})

man, we REALLY need to create the Hi5 lib + @davejohnson

ha no doubt