diff --git a/.gitignore b/.gitignore
index 2be39e4..678c29b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 bower_components*
 bower-*.json
+node_modules
diff --git a/.travis.yml b/.travis.yml
index 0772303..8a0b8f5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,10 @@ sudo: required
 before_script:
   - npm install -g polymer-cli
   - polymer install --variants
+  - >-
+    npm run update-types && git diff --exit-code || (echo -e
+    '\n\033[31mERROR:\033[0m Typings are stale. Please run "npm run
+    update-types".' && false)
 env:
   global:
     - secure: >-
diff --git a/iron-image.d.ts b/iron-image.d.ts
new file mode 100644
index 0000000..e423904
--- /dev/null
+++ b/iron-image.d.ts
@@ -0,0 +1,168 @@
+/**
+ * DO NOT EDIT
+ *
+ * This file was automatically generated by
+ *   https://github.com/Polymer/gen-typescript-declarations
+ *
+ * To modify these typings, edit the source file(s):
+ *   iron-image.html
+ */
+
+/// <reference path="../polymer/types/polymer.d.ts" />
+
+/**
+ * `iron-image` is an element for displaying an image that provides useful sizing and
+ * preloading options not found on the standard `<img>` tag.
+ *
+ * The `sizing` option allows the image to be either cropped (`cover`) or
+ * letterboxed (`contain`) to fill a fixed user-size placed on the element.
+ *
+ * The `preload` option prevents the browser from rendering the image until the
+ * image is fully loaded.  In the interim, either the element's CSS `background-color`
+ * can be be used as the placeholder, or the `placeholder` property can be
+ * set to a URL (preferably a data-URI, for instant rendering) for an
+ * placeholder image.
+ *
+ * The `fade` option (only valid when `preload` is set) will cause the placeholder
+ * image/color to be faded out once the image is rendered.
+ *
+ * Examples:
+ *
+ *   Basically identical to `<img src="...">` tag:
+ *
+ *     <iron-image src="http://lorempixel.com/400/400"></iron-image>
+ *
+ *   Will letterbox the image to fit:
+ *
+ *     <iron-image style="width:400px; height:400px;" sizing="contain"
+ *       src="http://lorempixel.com/600/400"></iron-image>
+ *
+ *   Will crop the image to fit:
+ *
+ *     <iron-image style="width:400px; height:400px;" sizing="cover"
+ *       src="http://lorempixel.com/600/400"></iron-image>
+ *
+ *   Will show light-gray background until the image loads:
+ *
+ *     <iron-image style="width:400px; height:400px; background-color: lightgray;"
+ *       sizing="cover" preload src="http://lorempixel.com/600/400"></iron-image>
+ *
+ *   Will show a base-64 encoded placeholder image until the image loads:
+ *
+ *     <iron-image style="width:400px; height:400px;" placeholder="data:image/gif;base64,..."
+ *       sizing="cover" preload src="http://lorempixel.com/600/400"></iron-image>
+ *
+ *   Will fade the light-gray background out once the image is loaded:
+ *
+ *     <iron-image style="width:400px; height:400px; background-color: lightgray;"
+ *       sizing="cover" preload fade src="http://lorempixel.com/600/400"></iron-image>
+ *
+ * Custom property | Description | Default
+ * ----------------|-------------|----------
+ * `--iron-image-placeholder` | Mixin applied to #placeholder | `{}`
+ * `--iron-image-width` | Sets the width of the wrapped image | `auto`
+ * `--iron-image-height` | Sets the height of the wrapped image | `auto`
+ */
+interface IronImageElement extends Polymer.Element {
+
+  /**
+   * The URL of an image.
+   */
+  src: string|null|undefined;
+
+  /**
+   * A short text alternative for the image.
+   */
+  alt: string|null|undefined;
+
+  /**
+   * CORS enabled images support: https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image
+   */
+  crossorigin: string|null|undefined;
+
+  /**
+   * When true, the image is prevented from loading and any placeholder is
+   * shown.  This may be useful when a binding to the src property is known to
+   * be invalid, to prevent 404 requests.
+   */
+  preventLoad: boolean|null|undefined;
+
+  /**
+   * Sets a sizing option for the image.  Valid values are `contain` (full
+   * aspect ratio of the image is contained within the element and
+   * letterboxed) or `cover` (image is cropped in order to fully cover the
+   * bounds of the element), or `null` (default: image takes natural size).
+   */
+  sizing: string|null|undefined;
+
+  /**
+   * When a sizing option is used (`cover` or `contain`), this determines
+   * how the image is aligned within the element bounds.
+   */
+  position: string|null|undefined;
+
+  /**
+   * When `true`, any change to the `src` property will cause the `placeholder`
+   * image to be shown until the new image has loaded.
+   */
+  preload: boolean|null|undefined;
+
+  /**
+   * This image will be used as a background/placeholder until the src image has
+   * loaded.  Use of a data-URI for placeholder is encouraged for instant rendering.
+   */
+  placeholder: string|null|undefined;
+
+  /**
+   * When `preload` is true, setting `fade` to true will cause the image to
+   * fade into place.
+   */
+  fade: boolean|null|undefined;
+
+  /**
+   * Read-only value that is true when the image is loaded.
+   */
+  readonly loaded: boolean|null|undefined;
+
+  /**
+   * Read-only value that tracks the loading state of the image when the `preload`
+   * option is used.
+   */
+  readonly loading: boolean|null|undefined;
+
+  /**
+   * Read-only value that indicates that the last set `src` failed to load.
+   */
+  readonly error: boolean|null|undefined;
+
+  /**
+   * Can be used to set the width of image (e.g. via binding); size may also be
+   * set via CSS.
+   */
+  width: number|null|undefined;
+
+  /**
+   * Can be used to set the height of image (e.g. via binding); size may also be
+   * set via CSS.
+   */
+  height: number|null|undefined;
+  created(): void;
+  _imgOnLoad(): void;
+  _imgOnError(): void;
+  _computePlaceholderHidden(): any;
+  _computePlaceholderClassName(): any;
+  _computeImgDivHidden(): any;
+  _computeImgDivARIAHidden(): any;
+  _computeImgDivARIALabel(): any;
+  _computeImgHidden(): any;
+  _widthChanged(): void;
+  _heightChanged(): void;
+  _loadStateObserver(src: any, preventLoad: any): void;
+  _placeholderChanged(): void;
+  _transformChanged(): void;
+  _resolveSrc(testSrc: any): any;
+}
+
+interface HTMLElementTagNameMap {
+  "iron-image": IronImageElement;
+}
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..a2d1ff0
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,974 @@
+{
+  "name": "@polymer/iron-image",
+  "requires": true,
+  "lockfileVersion": 1,
+  "dependencies": {
+    "@polymer/gen-typescript-declarations": {
+      "version": "1.2.0",
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+      "dev": true,
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+        "command-line-args": "5.0.2",
+        "command-line-usage": "4.1.0",
+        "doctrine": "2.1.0",
+        "escodegen": "1.9.0",
+        "fs-extra": "5.0.0",
+        "glob": "7.1.2",
+        "minimatch": "3.0.4",
+        "polymer-analyzer": "3.0.0-pre.12"
+      }
+    },
+    "@types/babel-generator": {
+      "version": "6.25.1",
+      "resolved": "https://registry.npmjs.org/@types/babel-generator/-/babel-generator-6.25.1.tgz",
+      "integrity": "sha512-nKNz9Ch4WP2TFZjQROhxqqS2SCk0OoDzGazJI6S+2sGgW9P7N4o3vluZAXFuPEnRqtz2A0vrrkK3tjQktxIlRw==",
+      "dev": true,
+      "requires": {
+        "@types/babel-types": "6.25.2"
+      }
+    },
+    "@types/babel-traverse": {
+      "version": "6.25.3",
+      "resolved": "https://registry.npmjs.org/@types/babel-traverse/-/babel-traverse-6.25.3.tgz",
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+      "dev": true,
+      "requires": {
+        "@types/babel-types": "6.25.2"
+      }
+    },
+    "@types/babel-types": {
+      "version": "6.25.2",
+      "resolved": "https://registry.npmjs.org/@types/babel-types/-/babel-types-6.25.2.tgz",
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+      "dev": true
+    },
+    "@types/babylon": {
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+      "resolved": "https://registry.npmjs.org/@types/babylon/-/babylon-6.16.2.tgz",
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+      "dev": true
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+      "dev": true,
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diff --git a/package.json b/package.json
new file mode 100644
index 0000000..b09f191
--- /dev/null
+++ b/package.json
@@ -0,0 +1,17 @@
+{
+  "name": "@polymer/iron-image",
+  "private": true,
+  "description": "An image-displaying element with lots of convenient features",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/PolymerElements/iron-image.git"
+  },
+  "license": "BSD-3-Clause",
+  "devDependencies": {
+    "@polymer/gen-typescript-declarations": "^1.2.0",
+    "bower": "^1.8.0"
+  },
+  "scripts": {
+    "update-types": "bower install && gen-typescript-declarations --deleteExisting --outDir ."
+  }
+}