diff --git a/.editorconfig b/.editorconfig
index f45ea799778..c801fc2a0b5 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -1,4 +1,4 @@
-[*.js]
+[*.{js,html}]
 indent_style = space
 indent_size = 4
 trim_trailing_whitespace = true
diff --git a/docs/_posts/examples/3400-01-19-using-featuresin.html b/docs/_posts/examples/3400-01-19-using-featuresin.html
index c9f06f2bb3d..6943e8ea099 100644
--- a/docs/_posts/examples/3400-01-19-using-featuresin.html
+++ b/docs/_posts/examples/3400-01-19-using-featuresin.html
@@ -165,15 +165,15 @@
                 if (err) console.warn(err);
 
                 if (features.length >= 1000) {
-                  return window.alert('Select a smaller number of features');
+                    return window.alert('Select a smaller number of features');
                 }
 
                 // Run through the selected features and set a filter
                 // to match features with unique FIPS codes to activate
                 // the `counties-highlighted` layer.
                 var filter = features.reduce(function(memo, feature) {
-                  memo.push(feature.properties.FIPS);
-                  return memo;
+                    memo.push(feature.properties.FIPS);
+                    return memo;
                 }, ['in', 'FIPS']);
 
                 map.setFilter("counties-highlighted", filter);