Is it possible to bind a function by name?

[jo-so]

I'm an Emacs user, and I'm familiar with the schema to bind functions to keys. I'm looking for something like bind(Normal, '<', 'beginning-of-page'). This would allow me to swap keys like r and R and much more.

Currently, I've scripted this:

const commands = {};

commands.import = function(name, keymap, key) {
    const ks = KeyboardUtils.encodeKeystroke(key);
    let cmd = keymap.mappings.find(ks);
    if (!cmd) {
        throw `${key} (${ks}) not defined in keymap`;
    }
    cmd = { ...cmd.meta };
    delete cmd.word;
    cmd.name = name;

    this[name] = cmd;
}

commands.import('beginning-of-page', Normal, 'gg');
commands.import('end-of-page', Normal, 'G');
commands.import('half-page-up', Normal, 'e');
// …

function bind(keymap, key, command) {
    if (typeof command === 'string') {
        command = commands[command];
        if (!command) {
            throw `Surfingkeys command ${command} not defined`;
        }
    }

    const ks = KeyboardUtils.encodeKeystroke(key);
    keymap.mappings.remove(ks);
    keymap.mappings.add(ks, { ...command });
}

bind(Normal, '<', 'beginning-of-page');
bind(Normal, '>', 'end-of-page');
bind(Normal, 'w', 'half-page-up');
bind(Normal, 'd', 'half-page-down');

I would pretty much like to drop my code and remove it with something from the API. But how is it possible?