refactor: Inline namespaces

Author: rschristian

src/constants.js

@@ -10,9 +10,9 @@ export const MATCHED = 1 << 1;
 /** Reset all mode flags */
 export const RESET_MODE = ~(MODE_HYDRATE | MODE_SUSPENDED);
 
-export const SVG_NAMESPACE = 'http://www.w3.org/2000/svg';
-export const XHTML_NAMESPACE = 'http://www.w3.org/1999/xhtml';
-export const MATH_NAMESPACE = 'http://www.w3.org/1998/Math/MathML';
+//export const SVG_NAMESPACE = 'http://www.w3.org/2000/svg';
+//export const XHTML_NAMESPACE = 'http://www.w3.org/1999/xhtml';
+//export const MATH_NAMESPACE = 'http://www.w3.org/1998/Math/MathML';
 
 export const EMPTY_OBJ = /** @type {any} */ ({});
 export const EMPTY_ARR = [];

src/diff/index.js

@@ -1,11 +1,8 @@
 import {
 	EMPTY_OBJ,
-	MATH_NAMESPACE,
 	MODE_HYDRATE,
 	MODE_SUSPENDED,
-	RESET_MODE,
-	SVG_NAMESPACE,
-	XHTML_NAMESPACE
+	RESET_MODE
 } from '../constants';
 import { BaseComponent, getDomSibling } from '../component';
 import { Fragment } from '../create-element';
@@ -424,9 +421,9 @@ function diffElementNodes(
 	let checked;
 
 	// Tracks entering and exiting namespaces when descending through the tree.
-	if (nodeType == 'svg') namespace = SVG_NAMESPACE;
-	else if (nodeType == 'math') namespace = MATH_NAMESPACE;
-	else if (!namespace) namespace = XHTML_NAMESPACE;
+	if (nodeType == 'svg') namespace = 'http://www.w3.org/2000/svg';
+	else if (nodeType == 'math') namespace = 'http://www.w3.org/1998/Math/MathML';
+	else if (!namespace) namespace = 'http://www.w3.org/1999/xhtml';
 
 	if (excessDomChildren != null) {
 		for (i = 0; i < excessDomChildren.length; i++) {
@@ -549,7 +546,9 @@ function diffElementNodes(
 				newVNode,
 				oldVNode,
 				globalContext,
-				nodeType == 'foreignObject' ? XHTML_NAMESPACE : namespace,
+				nodeType == 'foreignObject'
+					? 'http://www.w3.org/1999/xhtml'
+					: namespace,
 				excessDomChildren,
 				commitQueue,
 				excessDomChildren

src/diff/props.js

@@ -1,4 +1,4 @@
-import { IS_NON_DIMENSIONAL, SVG_NAMESPACE } from '../constants';
+import { IS_NON_DIMENSIONAL } from '../constants';
 import options from '../options';
 
 function setStyle(style, key, value) {
@@ -96,7 +96,7 @@ export function setProperty(dom, name, value, oldValue, namespace) {
 			);
 		}
 	} else {
-		if (namespace == SVG_NAMESPACE) {
+		if (namespace == 'http://www.w3.org/2000/svg') {
 			// Normalize incorrect prop usage for SVG:
 			// - xlink:href / xlinkHref --> href (xlink:href was removed from SVG and isn't needed)
 			// - className --> class