release-3.4.0

lib/checks/color/link-in-text-block-evaluate.js

@@ -136,6 +136,14 @@ function getColorContrast(node, parentBlock) {
   nodeColor = getForegroundColor(node);
   parentColor = getForegroundColor(parentBlock);
 
+  if (!nodeColor) {
+    nodeColor = new axe.commons.color.Color(0, 0, 0, 0);
+  }
+
+  if (!parentColor) {
+    parentColor = new axe.commons.color.Color(0, 0, 0, 0);
+  }
+
   if (!nodeColor || !parentColor) {
     return undefined;
   }

lib/commons/aria/ariadescribedby-text.js

@@ -0,0 +1,46 @@
+/**
+ * Get the accessible name based on aria-describedby
+ *
+ * @deprecated Do not use Element directly. Pass VirtualNode instead
+ * @param {VirtualNode|Element} element
+ * @param {Object} context
+ * @property {Bool} inLabelledByContext Whether or not the lookup is part of aria-describedby reference
+ * @property {Bool} inControlContext Whether or not the lookup is part of a native label reference
+ * @property {Element} startNode First node in accessible name computation
+ * @property {Bool} debug Enable logging for formControlValue
+ * @return {string} Concatenated text value for referenced elements
+ */
+function ariadescribedbyText(element, context = {}) {
+  const { vNode } = axe.utils.nodeLookup(element);
+  if (vNode?.props.nodeType !== 1) {
+    return '';
+  }
+
+  if (
+    vNode.props.nodeType !== 1 ||
+    context.inLabelledByContext ||
+    context.inControlContext ||
+    !vNode.attr('aria-describedby')
+  ) {
+    return '';
+  }
+
+  const refs = axe.commons.dom
+    .idrefs(vNode, 'aria-describedby')
+    .filter(elm => elm);
+  return refs.reduce((accessibleName, elm) => {
+    const accessibleNameAdd = axe.commons.text.accessibleText(elm, {
+      // Prevent the infinite reference loop:
+      inLabelledByContext: true,
+      startNode: context.startNode || vNode,
+      ...context
+    });
+
+    if (!accessibleName) {
+      return accessibleNameAdd;
+    }
+    return `${accessibleName} ${accessibleNameAdd}`;
+  }, '');
+}
+
+export default ariadescribedbyText;

lib/commons/aria/index.js

@@ -6,6 +6,7 @@
 export { default as allowedAttr } from './allowed-attr';
 export { default as arialabelText } from './arialabel-text';
 export { default as arialabelledbyText } from './arialabelledby-text';
+export { default as ariadescribedbyText } from './ariadescribedby-text';
 export { default as getAccessibleRefs } from './get-accessible-refs';
 export { default as getElementUnallowedRoles } from './get-element-unallowed-roles';
 export { default as getExplicitRole } from './get-explicit-role';

lib/commons/dom/get-overflow-hidden-ancestors.js

@@ -28,7 +28,7 @@ const getOverflowHiddenAncestors = memoize(
         ancestors.push(vNode);
       }
     } else {
-      if (overflow.includes('hidden')) {
+      if (overflow === 'hidden' || overflow.includes('clip')) {
         ancestors.push(vNode);
       }
     }

lib/core/base/rule.js

@@ -12,6 +12,7 @@ import {
 } from '../utils';
 import { isVisibleToScreenReaders } from '../../commons/dom';
 import constants from '../constants';
+import cache from './cache';
 
 export default function Rule(spec, parentAudit) {
   this._audit = parentAudit;
@@ -245,6 +246,7 @@ Rule.prototype.run = function run(context, options = {}, resolve, reject) {
   try {
     // Matches throws an error when it lacks support for document methods
     nodes = this.gatherAndMatchNodes(context, options);
+    cache.set(this.id, nodes.length);
   } catch (error) {
     // Exit the rule execution if matches fails
     reject(new SupportError({ cause: error, ruleId: this.id }));

lib/core/utils/check-helper.js

@@ -25,6 +25,9 @@ function checkHelper(checkResult, options, resolve, reject) {
     data(data) {
       checkResult.data = data;
     },
+    getCheckData() {
+      return checkResult.data;
+    },
     relatedNodes(nodes) {
       if (!window.Node) {
         return;

lib/core/utils/dq-element.js

@@ -26,7 +26,11 @@ function getSource(element) {
   if (!source && typeof window.XMLSerializer === 'function') {
     source = new window.XMLSerializer().serializeToString(element);
   }
-  return truncate(source || '');
+  let htmlString = truncate(source || '');
+  // Remove unwanted attributes
+  const regex = /\s*data-percy-[^=]+="[^"]*"/g;
+  htmlString = htmlString.replace(regex, '');
+  return htmlString;
 }
 
 /**