flow like the river

BACK_BACK/node_modules/d3-transition/src/transition/selectAll.js

@@ -0,0 +1,26 @@
+import {selectorAll} from "d3-selection";
+import {Transition} from "./index.js";
+import schedule, {get} from "./schedule.js";
+
+export default function(select) {
+  var name = this._name,
+      id = this._id;
+
+  if (typeof select !== "function") select = selectorAll(select);
+
+  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
+    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+      if (node = group[i]) {
+        for (var children = select.call(node, node.__data__, i, group), child, inherit = get(node, id), k = 0, l = children.length; k < l; ++k) {
+          if (child = children[k]) {
+            schedule(child, name, id, k, children, inherit);
+          }
+        }
+        subgroups.push(children);
+        parents.push(node);
+      }
+    }
+  }
+
+  return new Transition(subgroups, parents, name, id);
+}