For plugins that are loaded as [dependencies](#dependencies), reveal.js will wait for the fullfillment of their init Promise only for the *non-async* plugins.
If the init method does _not_ return a Promise, the plugin is considered ready right away and will not hold up the reveal.js startup sequence.
Note that reveal.js will *not* wait for the fullfillment of init promises if your plugin is loaded as an [async dependency](#dependencies). If the plugin's init method does _not_ return a Promise, the plugin is considered ready right away and will not hold up the reveal.js startup sequence.