diff --git a/.gitignore b/.gitignore
index f6cf0b30e19..1a75979e55a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -36,3 +36,4 @@ Servo.app
 .vscode
 
 /unminified-js
+
diff --git a/components/script/dom/htmlelement.rs b/components/script/dom/htmlelement.rs
index 616b69ebb95..d29251cb597 100644
--- a/components/script/dom/htmlelement.rs
+++ b/components/script/dom/htmlelement.rs
@@ -31,6 +31,7 @@ use dom::virtualmethods::VirtualMethods;
 use dom_struct::dom_struct;
 use html5ever::{LocalName, Prefix};
 use std::ascii::AsciiExt;
+use std::collections::HashSet;
 use std::default::Default;
 use std::rc::Rc;
 use style::attr::AttrValue;
@@ -277,6 +278,38 @@ impl HTMLElementMethods for HTMLElement {
         }
     }
 
+    // https://html.spec.whatwg.org/multipage/#attr-itemtype
+    fn Itemtypes(&self) -> Option<Vec<DOMString>> {
+        let atoms = self.element.get_tokenlist_attribute(&local_name!("itemtype"), );
+
+        if atoms.is_empty() {
+            return None;
+        }
+
+        let mut item_attr_values = HashSet::new();
+        for attr_value in &atoms {
+            item_attr_values.insert(DOMString::from(String::from(attr_value.trim())));
+        }
+
+        Some(item_attr_values.into_iter().collect())
+    }
+
+    // https://html.spec.whatwg.org/multipage/#names:-the-itemprop-attribute
+    fn PropertyNames(&self) -> Option<Vec<DOMString>> {
+        let atoms = self.element.get_tokenlist_attribute(&local_name!("itemprop"), );
+
+        if atoms.is_empty() {
+            return None;
+        }
+
+        let mut item_attr_values = HashSet::new();
+        for attr_value in &atoms {
+            item_attr_values.insert(DOMString::from(String::from(attr_value.trim())));
+        }
+
+        Some(item_attr_values.into_iter().collect())
+    }
+
     // https://html.spec.whatwg.org/multipage/#dom-click
     fn Click(&self) {
         if !self.upcast::<Element>().disabled_state() {
@@ -577,4 +610,17 @@ impl VirtualMethods for HTMLElement {
         }
         self.update_sequentially_focusable_status();
     }
+
+    fn parse_plain_attribute(&self, name: &LocalName, value: DOMString) -> AttrValue {
+        match name {
+            &local_name!("itemprop") => AttrValue::from_serialized_tokenlist(value.into()),
+            &local_name!("itemtype") => AttrValue::from_serialized_tokenlist(value.into()),
+            _ => {
+                self.super_type().unwrap().parse_plain_attribute(
+                    name,
+                    value,
+                )
+            },
+        }
+    }
 }
diff --git a/components/script/dom/webidls/HTMLElement.webidl b/components/script/dom/webidls/HTMLElement.webidl
index 845b4445f9c..7c1b0d62c21 100644
--- a/components/script/dom/webidls/HTMLElement.webidl
+++ b/components/script/dom/webidls/HTMLElement.webidl
@@ -18,9 +18,14 @@ interface HTMLElement : Element {
 
   // microdata
   //         attribute boolean itemScope;
+
   //         attribute DOMString itemId;
   //readonly attribute HTMLPropertiesCollection properties;
   //         attribute any itemValue; // acts as DOMString on setting
+  [Pref="dom.microdata.testing.enabled"]
+  sequence<DOMString>? propertyNames();
+  [Pref="dom.microdata.testing.enabled"]
+  sequence<DOMString>? itemtypes();
 
   // user interaction
   [CEReactions]
diff --git a/resources/prefs.json b/resources/prefs.json
index d430b9f4e4b..1c5a5c92943 100644
--- a/resources/prefs.json
+++ b/resources/prefs.json
@@ -6,6 +6,7 @@
   "dom.customelements.enabled": true,
   "dom.forcetouch.enabled": false,
   "dom.gamepad.enabled": false,
+  "dom.microdata.testing.enabled": true,
   "dom.mouseevent.which.enabled": false,
   "dom.mozbrowser.enabled": false,
   "dom.mutation_observer.enabled": false,
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index b292757f89e..4b4030f0d53 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -33350,6 +33350,36 @@
      {}
     ]
    ],
+   "mozilla/microdata/dup_prop_type_test.html": [
+    [
+     "/_mozilla/mozilla/microdata/dup_prop_type_test.html",
+     {}
+    ]
+   ],
+   "mozilla/microdata/extra_space_test.html": [
+    [
+     "/_mozilla/mozilla/microdata/extra_space_test.html",
+     {}
+    ]
+   ],
+   "mozilla/microdata/none_check.html": [
+    [
+     "/_mozilla/mozilla/microdata/none_check.html",
+     {}
+    ]
+   ],
+   "mozilla/microdata/regular_prop_type_test.html": [
+    [
+     "/_mozilla/mozilla/microdata/regular_prop_type_test.html",
+     {}
+    ]
+   ],
+   "mozilla/microdata/single_prop_type_test.html": [
+    [
+     "/_mozilla/mozilla/microdata/single_prop_type_test.html",
+     {}
+    ]
+   ],
    "mozilla/mime_sniffing_font_context.html": [
     [
      "/_mozilla/mozilla/mime_sniffing_font_context.html",
@@ -66385,6 +66415,26 @@
    "4e0b6d4c416e2e3f26de64e9364f0a8c7a6dc5cb",
    "testharness"
   ],
+  "mozilla/microdata/dup_prop_type_test.html": [
+   "4837cf896419aba6d1df6e89c5849a786d4e4be0",
+   "testharness"
+  ],
+  "mozilla/microdata/extra_space_test.html": [
+   "0a941e2eb10013ab55049d4d6007d8301149f651",
+   "testharness"
+  ],
+  "mozilla/microdata/none_check.html": [
+   "5addb47e08bdb4ad8293f22dffe95e4760336e08",
+   "testharness"
+  ],
+  "mozilla/microdata/regular_prop_type_test.html": [
+   "8e67711c47afe50edaa9b6baaa1349862e639e2e",
+   "testharness"
+  ],
+  "mozilla/microdata/single_prop_type_test.html": [
+   "0d81eecf7e52feb0964e879ffe9450881141caa5",
+   "testharness"
+  ],
   "mozilla/mime_sniffing_font_context.html": [
    "1311e72e0a0dafa6fae594ca1ce2deca164acd36",
    "testharness"
diff --git a/tests/wpt/mozilla/meta/mozilla/microdata/__dir__.ini b/tests/wpt/mozilla/meta/mozilla/microdata/__dir__.ini
new file mode 100644
index 00000000000..f199618497d
--- /dev/null
+++ b/tests/wpt/mozilla/meta/mozilla/microdata/__dir__.ini
@@ -0,0 +1 @@
+prefs: ["dom.microdata.testing.enabled:true"]
diff --git a/tests/wpt/mozilla/tests/mozilla/microdata/dup_prop_type_test.html b/tests/wpt/mozilla/tests/mozilla/microdata/dup_prop_type_test.html
new file mode 100644
index 00000000000..23afa74863c
--- /dev/null
+++ b/tests/wpt/mozilla/tests/mozilla/microdata/dup_prop_type_test.html
@@ -0,0 +1,48 @@
+<!doctype html>
+<meta charset="utf-8">
+<html>
+
+<head>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <title>Duplicate ItemProperty and ItemType test</title>
+</head>
+
+<body id="body" itemprop="hello world world" itemtype="hello world world">
+
+  <h1 id="h1" itemprop="hello world world" itemtype="hello world world">Header H1</h1>
+  <h2 id="h2" itemprop="hello world world" itemtype="hello world world">Header H2</h2>
+
+  <p id="p" itemprop="hello world world" itemtype="hello world world">Paragraph</p>
+
+  <form id="form" itemprop="hello world world" itemtype="hello world world">
+    <input id="input" itemprop="hello world world" itemtype="hello world world">Input Field in form</input>
+  </form>
+
+  <ul id="ul" itemprop="hello world world" itemtype="hello world world">
+    <li id="li" itemprop="hello world world" itemtype="hello world world">Unordered List Item</li>
+  </ul>
+
+  <meta id="meta" itemprop="hello world world" itemtype="hello world world">Meta Tag</meta>
+
+  <table id="table" itemprop="hello world world" itemtype="hello world world">Table</table>
+
+  <div id="div" itemprop="hello world world" itemtype="hello world world">Hi</div>
+
+  <a id="anchor" itemprop="hello world world" itemtype="hello world world"></a>
+
+</body>
+
+<script>
+  test(function() {
+    // Test all elements
+    var ids = ["body", "h1", "h2", "p", "input", "form", "li", "ul", "meta", "table", "div", "anchor"];
+    for (let id of ids) {
+      var elem = document.getElementById(id);
+      assert_array_equals(elem.propertyNames().sort(), ["hello", "world"].sort(), "The method should return 'hello world' ");
+      assert_array_equals(elem.itemtypes().sort(), ["hello", "world"].sort(), "The method should return 'hello world' ");
+    }
+  });
+</script>
+
+</html>
diff --git a/tests/wpt/mozilla/tests/mozilla/microdata/extra_space_test.html b/tests/wpt/mozilla/tests/mozilla/microdata/extra_space_test.html
new file mode 100644
index 00000000000..8ca5ff58729
--- /dev/null
+++ b/tests/wpt/mozilla/tests/mozilla/microdata/extra_space_test.html
@@ -0,0 +1,49 @@
+<!doctype html>
+<meta charset="utf-8">
+<html>
+<head>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <title>Extra Space ItemProperty and ItemType test</title>
+</head>
+
+<body id="body" itemprop="       hello           world         " itemtype="       hello           world         ">
+
+  <h1 id="h1" itemprop="       hello           world         " itemtype="       hello           world         ">Header H1</h1>
+  <h2 id="h2" itemprop="       hello           world         " itemtype="       hello           world         ">Header H2</h2>
+
+  <p id="p" itemprop="       hello           world         " itemtype="       hello           world         ">Paragraph</p>
+
+  <form id="form" itemprop="       hello           world         " itemtype="       hello           world         ">
+    <input id="input" itemprop="       hello           world         " itemtype="       hello           world         ">Input Field in form</input>
+  </form>
+
+  <ul id="ul" itemprop="       hello           world         " itemtype="       hello           world         ">
+    <li id="li" itemprop="       hello           world         " itemtype="       hello           world         ">Unordered List Item</li>
+  </ul>
+
+  <meta id="meta" itemprop="       hello           world         " itemtype="       hello           world         ">Meta Tag</meta>
+
+  <table id="table" itemprop="       hello           world         " itemtype="       hello           world         ">Table</table>
+
+  <div id="div" itemprop="       hello           world         " itemtype="       hello           world         ">Hi</div>
+
+  <a id="anchor" itemprop="       hello           world         " itemtype="       hello           world         "></a>
+
+</body>
+
+<script>
+  test(function() {
+    // Test all elements
+    var ids = ["body", "h1", "h2", "p", "input", "form", "li", "ul", "meta", "table", "div", "anchor"];
+    for (let id of ids) {
+      var elem = document.getElementById(id);
+      assert_array_equals(elem.propertyNames().sort(), ["hello", "world"].sort(), "The method should return 'hello world' ");
+      assert_array_equals(elem.itemtypes().sort(), ["hello", "world"].sort(), "The method should return 'hello world' ");
+    }
+
+
+  });
+</script>
+
+</html>
diff --git a/tests/wpt/mozilla/tests/mozilla/microdata/none_check.html b/tests/wpt/mozilla/tests/mozilla/microdata/none_check.html
new file mode 100644
index 00000000000..9cd9444a992
--- /dev/null
+++ b/tests/wpt/mozilla/tests/mozilla/microdata/none_check.html
@@ -0,0 +1,48 @@
+<!doctype html>
+<meta charset="utf-8">
+<html>
+
+<head>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <title>None check test</title>
+</head>
+
+<body id="body">
+
+  <h1 id="h1">Header H1</h1>
+  <h2 id="h2">Header H2</h2>
+
+  <p id="p">Paragraph</p>
+
+  <form id="form">
+    <input id="input">Input Field in form</input>
+  </form>
+
+  <ul id="ul">
+    <li id="li">Unordered List Item</li>
+  </ul>
+
+  <meta id="meta">Meta Tag</meta>
+
+  <table id="table">Table</table>
+
+  <div id="div">Hi</div>
+
+  <a id="anchor"></a>
+
+</body>
+
+<script>
+  test(function() {
+    // Test all elements
+    var ids = ["body", "h1", "h2", "p", "input", "form", "li", "ul", "meta", "table", "div", "anchor"];
+    for (let id of ids) {
+      var elem = document.getElementById(id);
+      assert_equals(elem.propertyNames(), null, "The method should return null ");
+      assert_equals(elem.itemtypes(), null, "The method should return null ");
+    }
+  });
+</script>
+
+</html>
diff --git a/tests/wpt/mozilla/tests/mozilla/microdata/regular_prop_type_test.html b/tests/wpt/mozilla/tests/mozilla/microdata/regular_prop_type_test.html
new file mode 100644
index 00000000000..e7b55d96d99
--- /dev/null
+++ b/tests/wpt/mozilla/tests/mozilla/microdata/regular_prop_type_test.html
@@ -0,0 +1,48 @@
+<!doctype html>
+<meta charset="utf-8">
+<html>
+
+<head>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <title>Regular ItemProperty and ItemType test</title>
+</head>
+
+<body id="body" itemprop="hello world" itemtype="hello world">
+
+  <h1 id="h1" itemprop="hello world" itemtype="hello world">Header H1</h1>
+  <h2 id="h2" itemprop="hello world" itemtype="hello world">Header H2</h2>
+
+  <p id="p" itemprop="hello world" itemtype="hello world">Paragraph</p>
+
+  <form id="form" itemprop="hello world" itemtype="hello world">
+    <input id="input" itemprop="hello world" itemtype="hello world">Input Field in form</input>
+  </form>
+
+  <ul id="ul" itemprop="hello world" itemtype="hello world">
+    <li id="li" itemprop="hello world" itemtype="hello world">Unordered List Item</li>
+  </ul>
+
+  <meta id="meta" itemprop="hello world" itemtype="hello world">Meta Tag</meta>
+
+  <table id="table" itemprop="hello world" itemtype="hello world">Table</table>
+
+  <div id="div" itemprop="hello world" itemtype="hello world">Hi</div>
+
+  <a id="anchor" itemprop="hello world" itemtype="hello world"></a>
+
+</body>
+
+<script>
+  test(function() {
+    // Test all elements
+    var ids = ["body", "h1", "h2", "p", "input", "form", "li", "ul", "meta", "table", "div", "anchor"];
+    for (let id of ids) {
+      var elem = document.getElementById(id);
+      assert_array_equals(elem.propertyNames().sort(), ["hello", "world"].sort(), "The method should return 'hello world' ");
+      assert_array_equals(elem.itemtypes().sort(), ["hello", "world"].sort(), "The method should return 'hello world' ");
+    }
+  });
+</script>
+
+</html>
diff --git a/tests/wpt/mozilla/tests/mozilla/microdata/single_prop_type_test.html b/tests/wpt/mozilla/tests/mozilla/microdata/single_prop_type_test.html
new file mode 100644
index 00000000000..15d6a413297
--- /dev/null
+++ b/tests/wpt/mozilla/tests/mozilla/microdata/single_prop_type_test.html
@@ -0,0 +1,48 @@
+<!doctype html>
+<meta charset="utf-8">
+<html>
+
+<head>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <title>Single ItemProperty and ItemType test</title>
+</head>
+
+<body id="body" itemprop="Hello" itemtype="Hello">
+
+  <h1 id="h1" itemprop="Hello" itemtype="Hello">Header H1</h1>
+  <h2 id="h2" itemprop="Hello" itemtype="Hello">Header H2</h2>
+
+  <p id="p" itemprop="Hello" itemtype="Hello">Paragraph</p>
+
+  <form id="form" itemprop="Hello" itemtype="Hello">
+    <input id="input" itemprop="Hello" itemtype="Hello">Input Field in form</input>
+  </form>
+
+  <ul id="ul" itemprop="Hello" itemtype="Hello">
+    <li id="li" itemprop="Hello" itemtype="Hello">Unordered List Item</li>
+  </ul>
+
+  <meta id="meta" itemprop="Hello" itemtype="Hello">Meta Tag</meta>
+
+  <table id="table" itemprop="Hello" itemtype="Hello">Table</table>
+
+  <div id="div" itemprop="Hello" itemtype="Hello">Hi</div>
+
+  <a id="anchor" itemprop="Hello" itemtype="Hello"></a>
+
+</body>
+
+<script>
+  test(function() {
+    // Test all elements
+    var ids = ["body", "h1", "h2", "p", "input", "form", "li", "ul", "meta", "table", "div", "anchor"];
+    for (let id of ids) {
+      var elem = document.getElementById(id);
+      assert_array_equals(elem.propertyNames(), ["Hello"], "The method should return 'Hello' ");
+      assert_array_equals(elem.itemtypes(), ["Hello"], "The method should return 'Hello' ");
+    }
+  });
+</script>
+
+</html>