Add some polyfills + utils

1 files changed, 21 insertions, 0 deletions

diff --git a/site/public/assets/javascripts/vendor/util.js b/site/public/assets/javascripts/vendor/util.js
index 0f5c6ed..487fe56 100644
--- a/site/public/assets/javascripts/vendor/util.js
+++ b/site/public/assets/javascripts/vendor/util.js
@@ -240,6 +240,27 @@ if (!Function.prototype.bind) {
         };
 }());
 
+/*
+ * Throttle a function to be called no more often
+ * than ms milliseconds
+ */
+function throttle(fn, ms) {
+  ms = ms || 100
+  var ready = true
+  var last
+  return function() {
+    var now = Date.now()
+    if (ready) {
+      last = now
+      return fn.apply(this, arguments)
+      ready = false
+    } else {
+      if (now - last > ms) {
+        ready = true
+      }
+    }
+  }
+}
 
 function selectElementContents(el) {
   if (window.getSelection && document.createRange) {