Open about:blank when window.open is called with no URL

lib/renderer/override.js

@@ -139,7 +139,11 @@ window.open = function (url, frameName, features) {
   }
 
   // Resolve relative urls.
-  url = resolveURL(url)
+  if (url == null || url == '') {
+    url = 'about:blank'
+  } else {
+    url = resolveURL(url)
+  }
   for (j = 0, len1 = ints.length; j < len1; j++) {
     name = ints[j]
     if (options[name] != null) {

spec/chromium-spec.js

@@ -250,8 +250,7 @@ describe('chromium feature', function () {
 
     it('defines a window.location setter', function (done) {
       // Load a page that definitely won't redirect
-      var b
+      var b = window.open('about:blank')
-      b = window.open('about:blank')
       webContents.fromId(b.guestId).once('did-finish-load', function () {
         // When it loads, redirect
         b.location = 'file://' + fixtures + '/pages/base-page.html'
@@ -262,6 +261,23 @@ describe('chromium feature', function () {
         })
       })
     })
+
+    it('open a blank page when no URL is specified', function (done) {
+      let b = window.open()
+      webContents.fromId(b.guestId).once('did-finish-load', function () {
+        const {location} = b
+        b.close()
+        assert.equal(location, 'about:blank')
+
+        let c = window.open('')
+        webContents.fromId(c.guestId).once('did-finish-load', function () {
+          const {location} = c
+          c.close()
+          assert.equal(location, 'about:blank')
+          done()
+        })
+      })
+    })
   })
 
   describe('window.opener', function () {