diff --git a/.eslintrc.json b/.eslintrc.json
index 4c49fd0b1d..98e24c656a 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -51,7 +51,6 @@
     "unicorn/no-useless-undefined": "off",
     "unicorn/prefer-array-find": "off",
     "unicorn/prefer-dataset": "off",
-    "unicorn/prefer-includes": "off",
     "unicorn/prefer-node-append": "off",
     "unicorn/prefer-node-remove": "off",
     "unicorn/prefer-number-properties": "off",
diff --git a/js/src/dom/event-handler.js b/js/src/dom/event-handler.js
index bf9aa38dff..64a061ae69 100644
--- a/js/src/dom/event-handler.js
+++ b/js/src/dom/event-handler.js
@@ -151,7 +151,7 @@ function normalizeParams(originalTypeEvent, handler, delegationFn) {
     typeEvent = custom
   }
 
-  const isNative = nativeEvents.indexOf(typeEvent) > -1
+  const isNative = nativeEvents.includes(typeEvent)
 
   if (!isNative) {
     typeEvent = originalTypeEvent
@@ -210,7 +210,7 @@ function removeNamespacedHandlers(element, events, typeEvent, namespace) {
   const storeElementEvent = events[typeEvent] || {}
 
   Object.keys(storeElementEvent).forEach(handlerKey => {
-    if (handlerKey.indexOf(namespace) > -1) {
+    if (handlerKey.includes(namespace)) {
       const event = storeElementEvent[handlerKey]
 
       removeHandler(element, events, typeEvent, event.originalHandler, event.delegationSelector)
@@ -257,7 +257,7 @@ const EventHandler = {
     Object.keys(storeElementEvent).forEach(keyHandlers => {
       const handlerKey = keyHandlers.replace(stripUidRegex, '')
 
-      if (!inNamespace || originalTypeEvent.indexOf(handlerKey) > -1) {
+      if (!inNamespace || originalTypeEvent.includes(handlerKey)) {
         const event = storeElementEvent[keyHandlers]
 
         removeHandler(element, events, typeEvent, event.originalHandler, event.delegationSelector)
@@ -273,7 +273,7 @@ const EventHandler = {
     const $ = getjQuery()
     const typeEvent = event.replace(stripNameRegex, '')
     const inNamespace = event !== typeEvent
-    const isNative = nativeEvents.indexOf(typeEvent) > -1
+    const isNative = nativeEvents.includes(typeEvent)
 
     let jQueryEvent
     let bubbles = true
diff --git a/js/src/tooltip.js b/js/src/tooltip.js
index 2a55992cba..e4616f1f19 100644
--- a/js/src/tooltip.js
+++ b/js/src/tooltip.js
@@ -679,7 +679,7 @@ class Tooltip {
     const dataAttributes = Manipulator.getDataAttributes(this.element)
 
     Object.keys(dataAttributes).forEach(dataAttr => {
-      if (DISALLOWED_ATTRIBUTES.indexOf(dataAttr) !== -1) {
+      if (DISALLOWED_ATTRIBUTES.includes(dataAttr)) {
         delete dataAttributes[dataAttr]
       }
     })
diff --git a/js/src/util/sanitizer.js b/js/src/util/sanitizer.js
index d3747bba9d..27c8dcfb6a 100644
--- a/js/src/util/sanitizer.js
+++ b/js/src/util/sanitizer.js
@@ -35,8 +35,8 @@ const DATA_URL_PATTERN = /^data:(?:image\/(?:bmp|gif|jpeg|jpg|png|tiff|webp)|vid
 const allowedAttribute = (attr, allowedAttributeList) => {
   const attrName = attr.nodeName.toLowerCase()
 
-  if (allowedAttributeList.indexOf(attrName) !== -1) {
-    if (uriAttrs.indexOf(attrName) !== -1) {
+  if (allowedAttributeList.includes(attrName)) {
+    if (uriAttrs.includes(attrName)) {
       return Boolean(attr.nodeValue.match(SAFE_URL_PATTERN) || attr.nodeValue.match(DATA_URL_PATTERN))
     }
 
@@ -107,7 +107,7 @@ export function sanitizeHtml(unsafeHtml, allowList, sanitizeFn) {
     const el = elements[i]
     const elName = el.nodeName.toLowerCase()
 
-    if (allowlistKeys.indexOf(elName) === -1) {
+    if (!allowlistKeys.includes(elName)) {
       el.parentNode.removeChild(el)
 
       continue
diff --git a/site/.eslintrc.json b/site/.eslintrc.json
index f7b6b4a7f3..ec51527c14 100644
--- a/site/.eslintrc.json
+++ b/site/.eslintrc.json
@@ -36,7 +36,6 @@
     "unicorn/no-for-loop": "off",
     "unicorn/no-null": "off",
     "unicorn/prefer-dataset": "off",
-    "unicorn/prefer-includes": "off",
     "unicorn/prefer-node-append": "off",
     "unicorn/prefer-query-selector": "off",
     "unicorn/prevent-abbreviations": "off"