Use 0 instead of null in property config

We're using this value to check bits and null is 0 in that sense anyway. This shaves off a few bytes (though as expected, gzip is virtually unchanged)

src/renderers/dom/shared/HTMLDOMPropertyConfig.js

@@ -30,176 +30,176 @@ var HTMLDOMPropertyConfig = {
     /**
      * Standard Properties
      */
-    accept: null,
-    acceptCharset: null,
-    accessKey: null,
-    action: null,
+    accept: 0,
+    acceptCharset: 0,
+    accessKey: 0,
+    action: 0,
     allowFullScreen: HAS_BOOLEAN_VALUE,
-    allowTransparency: null,
-    alt: null,
+    allowTransparency: 0,
+    alt: 0,
     async: HAS_BOOLEAN_VALUE,
-    autoComplete: null,
+    autoComplete: 0,
     // autoFocus is polyfilled/normalized by AutoFocusUtils
     // autoFocus: HAS_BOOLEAN_VALUE,
     autoPlay: HAS_BOOLEAN_VALUE,
     capture: HAS_BOOLEAN_VALUE,
-    cellPadding: null,
-    cellSpacing: null,
-    charSet: null,
-    challenge: null,
+    cellPadding: 0,
+    cellSpacing: 0,
+    charSet: 0,
+    challenge: 0,
     checked: MUST_USE_PROPERTY | HAS_BOOLEAN_VALUE,
-    cite: null,
-    classID: null,
-    className: null,
+    cite: 0,
+    classID: 0,
+    className: 0,
     cols: HAS_POSITIVE_NUMERIC_VALUE,
-    colSpan: null,
-    content: null,
-    contentEditable: null,
-    contextMenu: null,
+    colSpan: 0,
+    content: 0,
+    contentEditable: 0,
+    contextMenu: 0,
     controls: HAS_BOOLEAN_VALUE,
-    coords: null,
-    crossOrigin: null,
-    data: null, // For `<object />` acts as `src`.
-    dateTime: null,
+    coords: 0,
+    crossOrigin: 0,
+    data: 0, // For `<object />` acts as `src`.
+    dateTime: 0,
     default: HAS_BOOLEAN_VALUE,
     defer: HAS_BOOLEAN_VALUE,
-    dir: null,
+    dir: 0,
     disabled: HAS_BOOLEAN_VALUE,
     download: HAS_OVERLOADED_BOOLEAN_VALUE,
-    draggable: null,
-    encType: null,
-    form: null,
-    formAction: null,
-    formEncType: null,
-    formMethod: null,
+    draggable: 0,
+    encType: 0,
+    form: 0,
+    formAction: 0,
+    formEncType: 0,
+    formMethod: 0,
     formNoValidate: HAS_BOOLEAN_VALUE,
-    formTarget: null,
-    frameBorder: null,
-    headers: null,
-    height: null,
+    formTarget: 0,
+    frameBorder: 0,
+    headers: 0,
+    height: 0,
     hidden: HAS_BOOLEAN_VALUE,
-    high: null,
-    href: null,
-    hrefLang: null,
-    htmlFor: null,
-    httpEquiv: null,
-    icon: null,
-    id: null,
-    inputMode: null,
-    integrity: null,
-    is: null,
-    keyParams: null,
-    keyType: null,
-    kind: null,
-    label: null,
-    lang: null,
-    list: null,
+    high: 0,
+    href: 0,
+    hrefLang: 0,
+    htmlFor: 0,
+    httpEquiv: 0,
+    icon: 0,
+    id: 0,
+    inputMode: 0,
+    integrity: 0,
+    is: 0,
+    keyParams: 0,
+    keyType: 0,
+    kind: 0,
+    label: 0,
+    lang: 0,
+    list: 0,
     loop: HAS_BOOLEAN_VALUE,
-    low: null,
-    manifest: null,
-    marginHeight: null,
-    marginWidth: null,
-    max: null,
-    maxLength: null,
-    media: null,
-    mediaGroup: null,
-    method: null,
-    min: null,
-    minLength: null,
+    low: 0,
+    manifest: 0,
+    marginHeight: 0,
+    marginWidth: 0,
+    max: 0,
+    maxLength: 0,
+    media: 0,
+    mediaGroup: 0,
+    method: 0,
+    min: 0,
+    minLength: 0,
     // Caution; `option.selected` is not updated if `select.multiple` is
     // disabled with `removeAttribute`.
     multiple: MUST_USE_PROPERTY | HAS_BOOLEAN_VALUE,
     muted: MUST_USE_PROPERTY | HAS_BOOLEAN_VALUE,
-    name: null,
-    nonce: null,
+    name: 0,
+    nonce: 0,
     noValidate: HAS_BOOLEAN_VALUE,
     open: HAS_BOOLEAN_VALUE,
-    optimum: null,
-    pattern: null,
-    placeholder: null,
-    poster: null,
-    preload: null,
-    profile: null,
-    radioGroup: null,
+    optimum: 0,
+    pattern: 0,
+    placeholder: 0,
+    poster: 0,
+    preload: 0,
+    profile: 0,
+    radioGroup: 0,
     readOnly: HAS_BOOLEAN_VALUE,
-    rel: null,
+    rel: 0,
     required: HAS_BOOLEAN_VALUE,
     reversed: HAS_BOOLEAN_VALUE,
-    role: null,
+    role: 0,
     rows: HAS_POSITIVE_NUMERIC_VALUE,
     rowSpan: HAS_NUMERIC_VALUE,
-    sandbox: null,
-    scope: null,
+    sandbox: 0,
+    scope: 0,
     scoped: HAS_BOOLEAN_VALUE,
-    scrolling: null,
+    scrolling: 0,
     seamless: HAS_BOOLEAN_VALUE,
     selected: MUST_USE_PROPERTY | HAS_BOOLEAN_VALUE,
-    shape: null,
+    shape: 0,
     size: HAS_POSITIVE_NUMERIC_VALUE,
-    sizes: null,
+    sizes: 0,
     span: HAS_POSITIVE_NUMERIC_VALUE,
-    spellCheck: null,
-    src: null,
-    srcDoc: null,
-    srcLang: null,
-    srcSet: null,
+    spellCheck: 0,
+    src: 0,
+    srcDoc: 0,
+    srcLang: 0,
+    srcSet: 0,
     start: HAS_NUMERIC_VALUE,
-    step: null,
-    style: null,
-    summary: null,
-    tabIndex: null,
-    target: null,
-    title: null,
+    step: 0,
+    style: 0,
+    summary: 0,
+    tabIndex: 0,
+    target: 0,
+    title: 0,
     // Setting .type throws on non-<input> tags
-    type: null,
-    useMap: null,
+    type: 0,
+    useMap: 0,
     value: MUST_USE_PROPERTY | HAS_SIDE_EFFECTS,
-    width: null,
-    wmode: null,
-    wrap: null,
+    width: 0,
+    wmode: 0,
+    wrap: 0,
 
     /**
      * RDFa Properties
      */
-    about: null,
-    datatype: null,
-    inlist: null,
-    prefix: null,
+    about: 0,
+    datatype: 0,
+    inlist: 0,
+    prefix: 0,
     // property is also supported for OpenGraph in meta tags.
-    property: null,
-    resource: null,
-    typeof: null,
-    vocab: null,
+    property: 0,
+    resource: 0,
+    typeof: 0,
+    vocab: 0,
 
     /**
      * Non-standard Properties
      */
     // autoCapitalize and autoCorrect are supported in Mobile Safari for
     // keyboard hints.
-    autoCapitalize: null,
-    autoCorrect: null,
+    autoCapitalize: 0,
+    autoCorrect: 0,
     // autoSave allows WebKit/Blink to persist values of input fields on page reloads
-    autoSave: null,
+    autoSave: 0,
     // color is for Safari mask-icon link
-    color: null,
+    color: 0,
     // itemProp, itemScope, itemType are for
     // Microdata support. See http://schema.org/docs/gs.html
-    itemProp: null,
+    itemProp: 0,
     itemScope: HAS_BOOLEAN_VALUE,
-    itemType: null,
+    itemType: 0,
     // itemID and itemRef are for Microdata support as well but
     // only specified in the WHATWG spec document. See
     // https://html.spec.whatwg.org/multipage/microdata.html#microdata-dom-api
-    itemID: null,
-    itemRef: null,
+    itemID: 0,
+    itemRef: 0,
     // results show looking glass icon and recent searches on input
     // search fields in WebKit/Blink
-    results: null,
+    results: 0,
     // IE-only attribute that specifies security restrictions on an iframe
     // as an alternative to the sandbox attribute on IE<10
-    security: null,
+    security: 0,
     // IE-only attribute that controls focus behavior
-    unselectable: null,
+    unselectable: 0,
   },
   DOMAttributeNames: {
     acceptCharset: 'accept-charset',