1 files changed, 7 insertions, 0 deletions
diff --git a/actionview/app/assets/javascripts/rails-ujs/utils/dom.coffee b/actionview/app/assets/javascripts/rails-ujs/utils/dom.coffee
index 6bef618147..3d3c5bb330 100644
--- a/actionview/app/assets/javascripts/rails-ujs/utils/dom.coffee
+++ b/actionview/app/assets/javascripts/rails-ujs/utils/dom.coffee
@@ -5,6 +5,13 @@ m = Element.prototype.matches or
     Element.prototype.oMatchesSelector or
     Element.prototype.webkitMatchesSelector
 
+# Checks if the given native dom element matches the selector
+# element::
+#   native DOM element
+# selector::
+#   css selector string or
+#   a javascript object with `selector` and `exclude` properties
+#   Examples: "form", { selector: "form", exclude: "form[data-remote='true']"}
 Rails.matches = (element, selector) ->
   if selector.exclude?
     m.call(element, selector.selector) and not m.call(element, selector.exclude)