1 files changed, 54 insertions, 0 deletions
diff --git a/popperjs/package/lib/modifiers/offset.js b/popperjs/package/lib/modifiers/offset.js
new file mode 100644
index 0000000..12fa007
--- /dev/null
+++ b/popperjs/package/lib/modifiers/offset.js
@@ -0,0 +1,54 @@
+import getBasePlacement from "../utils/getBasePlacement.js";
+import { top, left, right, placements } from "../enums.js"; // eslint-disable-next-line import/no-unused-modules
+
+export function distanceAndSkiddingToXY(placement, rects, offset) {
+  var basePlacement = getBasePlacement(placement);
+  var invertDistance = [left, top].indexOf(basePlacement) >= 0 ? -1 : 1;
+
+  var _ref = typeof offset === 'function' ? offset(Object.assign({}, rects, {
+    placement: placement
+  })) : offset,
+      skidding = _ref[0],
+      distance = _ref[1];
+
+  skidding = skidding || 0;
+  distance = (distance || 0) * invertDistance;
+  return [left, right].indexOf(basePlacement) >= 0 ? {
+    x: distance,
+    y: skidding
+  } : {
+    x: skidding,
+    y: distance
+  };
+}
+
+function offset(_ref2) {
+  var state = _ref2.state,
+      options = _ref2.options,
+      name = _ref2.name;
+  var _options$offset = options.offset,
+      offset = _options$offset === void 0 ? [0, 0] : _options$offset;
+  var data = placements.reduce(function (acc, placement) {
+    acc[placement] = distanceAndSkiddingToXY(placement, state.rects, offset);
+    return acc;
+  }, {});
+  var _data$state$placement = data[state.placement],
+      x = _data$state$placement.x,
+      y = _data$state$placement.y;
+
+  if (state.modifiersData.popperOffsets != null) {
+    state.modifiersData.popperOffsets.x += x;
+    state.modifiersData.popperOffsets.y += y;
+  }
+
+  state.modifiersData[name] = data;
+} // eslint-disable-next-line import/no-unused-modules
+
+
+export default {
+  name: 'offset',
+  enabled: true,
+  phase: 'main',
+  requires: ['popperOffsets'],
+  fn: offset
+};
+\ No newline at end of file