Show an outline around the player's currently targeted block (voxel.js plugin)
Load with voxel-plugins. Comparable to voxel-highlight except requires voxel-mesher and voxel-shader, uses gl-modules instead of three.js, and has less functionality.
Emits events when the raycast voxel target changes (similar to voxel-highlight):
var outlinePlugin = game.plugins.get('voxel-outline');
outlinePlugin.on('highlight', function(pos, info) { /* ... */});
outlinePlugin.on('remove', function(pos) { /* ... */});
For an example of this API usage, see voxel-voila.
MIT