import os

def convert_line_endings(file, lineEndFrom='\r\n', lineEndTo='\n'):
    with open(file, 'rb') as f:
        content = f.read()
        content = content.replace(lineEndFrom.encode(), lineEndTo.encode())

    with open(file, 'wb') as f:
        f.write(content)
    print("Converted:", file)

def get_all_files(path, extensions=()):
    alljsfiles = []
    for (dirpath, directory_names, file_names) in os.walk(path):
        if extensions == ():
            jsfiles = [os.path.join(dirpath, f) for f in file_names]
        else:
            jsfiles = [os.path.join(dirpath, f) for f in file_names if f.endswith(extensions)]
        alljsfiles += jsfiles
    return alljsfiles

def convert_all_line_endings_of_js_files(path):
    files = get_all_files(path, ('.js','.jsx'))
    for file in files:
        convert_line_endings(file)

convert_all_line_endings_of_js_files('demo')