Content checks for text expression

src/expressions/text.js

@@ -13,10 +13,13 @@ export const getTextNode = (node, childNodeIndex) => {
 /**
  * This methods handles a simple text expression update
  * @param   {Object} expression - expression object
- * @param   {HTMLElement} expression.node - target node
+ * @param   {Text} expression.node - target node
  * @param   {*} value - new expression value
  * @returns {undefined}
  */
 export default function textExpression({ node }, value) {
-  node.data = normalizeStringValue(value)
+  const text = normalizeStringValue(value)
+  if (node.data !== text) {
+    node.data = normalizeStringValue(value)
+  }
 }

src/util/normalize-string-value.js

@@ -1,10 +1,8 @@
-import { isNil } from '@riotjs/util/checks'
-
 /**
- * Normalize the user value in order to render a empty string in case of falsy values
+ * Normalize the user value in order to render an empty string in case of falsy values
  * @param   {*} value - user input value
  * @returns {string} hopefully a string
  */
 export default function normalizeStringValue(value) {
-  return isNil(value) ? '' : value
+  return value == null ? '' : value
 }