From 7f62119e0d437f985a6ed13fcc96937523909eba Mon Sep 17 00:00:00 2001
From: Brian Kardell <bkardell@gmail.com>
Date: Sat, 27 Apr 2019 13:59:58 -0400
Subject: [PATCH] Create element_count.js (#158)

Per https://github.com/HTTPArchive/httparchive.org/issues/141
---
 custom_metrics/element_count.js | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 custom_metrics/element_count.js

diff --git a/custom_metrics/element_count.js b/custom_metrics/element_count.js
new file mode 100644
index 00000000..11eb245f
--- /dev/null
+++ b/custom_metrics/element_count.js
@@ -0,0 +1,12 @@
+return JSON.stringify(
+  Array.from(
+    document
+      .querySelectorAll('*'))
+      .reduce((acc, el) => {
+        let tag = el.tagName.toLowerCase()
+        acc[tag] = (typeof acc[tag] !== 'undefined') ? acc[tag] : 0
+        acc[tag]++
+        return acc 
+      }, {}
+  )
+)