main repo

node_modules/dom-helpers/esm/transitionEnd.js

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+import css from './css';
+import listen from './listen';
+import triggerEvent from './triggerEvent';
+
+function parseDuration(node) {
+  var str = css(node, 'transitionDuration') || '';
+  var mult = str.indexOf('ms') === -1 ? 1000 : 1;
+  return parseFloat(str) * mult;
+}
+
+function emulateTransitionEnd(element, duration, padding) {
+  if (padding === void 0) {
+    padding = 5;
+  }
+
+  var called = false;
+  var handle = setTimeout(function () {
+    if (!called) triggerEvent(element, 'transitionend', true);
+  }, duration + padding);
+  var remove = listen(element, 'transitionend', function () {
+    called = true;
+  }, {
+    once: true
+  });
+  return function () {
+    clearTimeout(handle);
+    remove();
+  };
+}
+
+export default function transitionEnd(element, handler, duration, padding) {
+  if (duration == null) duration = parseDuration(element) || 0;
+  var removeEmulate = emulateTransitionEnd(element, duration, padding);
+  var remove = listen(element, 'transitionend', handler);
+  return function () {
+    removeEmulate();
+    remove();
+  };
+}