Add forEachSelectors method

tests/scripts/lib/foreach-selectors.js

@@ -0,0 +1,24 @@
+var tape = require("tape")
+
+var forEachEls = require("../../../src/scripts/lib/foreach-selectors.js")
+
+var cb = function(el) {
+  el.className = "modified"
+}
+
+tape("test forEachSelector", function(t) {
+  forEachEls(["html", "body"], cb)
+
+  t.equal(document.documentElement.className, "modified", "callback has been executed on first selector")
+  t.equal(document.body.className, "modified", "callback has been executed on first selector")
+
+  document.documentElement.className = ""
+  document.body.className = ""
+
+  forEachEls(["html", "body"], cb, null, document.documentElement)
+
+  t.equal(document.documentElement.className, "", "callback has not been executed on first selector when context is used")
+  t.equal(document.body.className, "modified", "callback has been executed on first selector when context is used")
+
+  t.end()
+})