Merge branch 'dev' into unknown-count

lib/filters.js

@@ -115,6 +115,17 @@ export const refFilter = (data, { domain, domainOnly, raw }) => {
 
 export const browserFilter = data => data.map(({ x, y }) => ({ x: BROWSERS[x] ?? x, y }));
 
+export const eventTypeFilter = (data, types) => {
+  if (!types || types.length === 0) {
+    return data;
+  }
+
+  return data.filter(({ x }) => {
+    const [event] = x.split('\t');
+    return types.some(type => type === event);
+  });
+};
+
 export const percentFilter = data => {
   const total = data.reduce((n, { y }) => n + y, 0);
   return data.map(({ x, y, ...props }) => ({ x, y, z: total ? (y / total) * 100 : 0, ...props }));