From 1a879369fd373bda3c0cf9029d6670f8c334c060 Mon Sep 17 00:00:00 2001
From: Alasdair McLeay <alasdair.mcleay@me.com>
Date: Fri, 27 Jan 2023 11:35:44 +0000
Subject: [PATCH] Support d3.drag in testing environments

Return early from nodrag if no view is passed.

Fixes #89
---
 src/nodrag.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/nodrag.js b/src/nodrag.js
index 6076694..35e9c84 100644
--- a/src/nodrag.js
+++ b/src/nodrag.js
@@ -2,6 +2,9 @@ import {select} from "d3-selection";
 import noevent, {nonpassivecapture} from "./noevent.js";
 
 export default function(view) {
+  if (!view) {
+    return;
+  }
   var root = view.document.documentElement,
       selection = select(view).on("dragstart.drag", noevent, nonpassivecapture);
   if ("onselectstart" in root) {