From 6d4f68627dca4041440a28980a744bbeeace69ea Mon Sep 17 00:00:00 2001
From: Lutz Roeder <lutzroeder@users.noreply.github.com>
Date: Sat, 30 Dec 2017 12:26:55 -1000
Subject: [PATCH] Add require to d3.js

---
 Makefile          |  6 +++++-
 lib/d3.js         | 18 +++++++++++++++++-
 lib/render.js     |  1 +
 test/node-test.js |  2 ++
 4 files changed, 25 insertions(+), 2 deletions(-)
 create mode 100644 test/node-test.js

diff --git a/Makefile b/Makefile
index 48125130..719b127f 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,6 @@
 MOD = dagre-d3
 
+NODE = node
 NPM = npm
 BROWSERIFY = ./node_modules/browserify/bin/cmd.js
 ISTANBUL = ./node_modules/istanbul/lib/cli.js
@@ -37,7 +38,7 @@ lib/version.js: package.json
 $(DIRS):
 	@mkdir -p $@
 
-test: browser-test demo-test
+test: browser-test demo-test node-test
 
 browser-test: $(BUILD_FILES)
 	$(KARMA) start --single-run $(KARMA_OPTS)
@@ -46,6 +47,9 @@ browser-test: $(BUILD_FILES)
 demo-test: test/demo-test.js | $(BUILD_FILES)
 	$(PHANTOMJS) $<
 
+node-test: test/node-test.js | $(BUILD_FILES)
+	$(NODE) $<
+
 bower.json: package.json src/release/make-bower.json.js
 	@src/release/make-bower.json.js > $@
 
diff --git a/lib/d3.js b/lib/d3.js
index c1a46acc..eda5a2a5 100644
--- a/lib/d3.js
+++ b/lib/d3.js
@@ -1,2 +1,18 @@
 // Stub to get D3 either via NPM or from the global object
-module.exports = window.d3;
+var d3;
+
+if (!d3) {
+  if (require) {
+    try {
+      d3 = require("d3");
+    }
+    catch (e) {
+    }
+  }
+}
+
+if (!d3) {
+  d3 = window.d3;
+}
+
+module.exports = d3;
diff --git a/lib/render.js b/lib/render.js
index 7bf16dd1..694202bb 100644
--- a/lib/render.js
+++ b/lib/render.js
@@ -1,4 +1,5 @@
 var _ = require("./lodash"),
+    d3 = require("./d3"),
     layout = require("./dagre").layout;
 
 module.exports = render;
diff --git a/test/node-test.js b/test/node-test.js
new file mode 100644
index 00000000..3bdfb745
--- /dev/null
+++ b/test/node-test.js
@@ -0,0 +1,2 @@
+var dagreD3 = require("../build/dist/dagre-d3");
+var dagreD3Core = require("../build/dist/dagre-d3.core");