diff --git a/packages/website/plugins/generated-rule-docs.ts b/packages/website/plugins/generated-rule-docs.ts
index 7823f2d84486..816df1635a4f 100644
--- a/packages/website/plugins/generated-rule-docs.ts
+++ b/packages/website/plugins/generated-rule-docs.ts
@@ -52,9 +52,8 @@ export const generatedRuleDocs: Plugin = () => {
       return;
     }
 
-    const rule = pluginRules[file.stem];
-    const meta = rule?.meta;
-    if (!meta?.docs) {
+    const rule = file.stem in pluginRules ? pluginRules[file.stem] : undefined;
+    if (!rule?.meta.docs) {
       return;
     }
 
@@ -72,7 +71,7 @@ export const generatedRuleDocs: Plugin = () => {
       {
         children: [
           {
-            children: meta.docs.description
+            children: rule.meta.docs.description
               .split(/`(.+?)`/)
               .map((value, index, array) => ({
                 type: index % 2 === 0 ? 'text' : 'inlineCode',
@@ -90,7 +89,7 @@ export const generatedRuleDocs: Plugin = () => {
     );
 
     // 3. Add a notice about formatting rules being 🤢
-    if (meta.type === 'layout') {
+    if (rule.meta.type === 'layout') {
       const warningNode = {
         value: `
 <admonition type="warning">
@@ -150,7 +149,7 @@ export const generatedRuleDocs: Plugin = () => {
       }
 
       insertIfMissing('Options');
-      if (meta.docs.extendsBaseRule) {
+      if (rule.meta.docs.extendsBaseRule) {
         insertIfMissing('How to Use');
       }
       return [headingIndices[0], headingIndices[1]];
@@ -158,10 +157,10 @@ export const generatedRuleDocs: Plugin = () => {
 
     let eslintrc: string;
 
-    if (meta.docs.extendsBaseRule) {
+    if (rule.meta.docs.extendsBaseRule) {
       const extendsBaseRuleName =
-        typeof meta.docs.extendsBaseRule === 'string'
-          ? meta.docs.extendsBaseRule
+        typeof rule.meta.docs.extendsBaseRule === 'string'
+          ? rule.meta.docs.extendsBaseRule
           : file.stem;
 
       children.splice(optionsH2Index + 1, 0, {
@@ -257,9 +256,9 @@ export const generatedRuleDocs: Plugin = () => {
 
       optionsH2Index += 2;
 
-      const hasNoConfig = Array.isArray(meta.schema)
-        ? meta.schema.length === 0
-        : Object.keys(meta.schema).length === 0;
+      const hasNoConfig = Array.isArray(rule.meta.schema)
+        ? rule.meta.schema.length === 0
+        : Object.keys(rule.meta.schema).length === 0;
       if (hasNoConfig) {
         children.splice(optionsH2Index + 1, 0, {
           children: [
@@ -390,7 +389,7 @@ export const generatedRuleDocs: Plugin = () => {
     );
 
     // 6. Also add a notice about coming from ESLint core for extension rules
-    if (meta.docs.extendsBaseRule) {
+    if (rule.meta.docs.extendsBaseRule) {
       children.push({
         children: [
           {
@@ -405,9 +404,9 @@ export const generatedRuleDocs: Plugin = () => {
             type: 'link',
             title: null,
             url: `https://github.com/eslint/eslint/blob/main/docs/src/rules/${
-              meta.docs.extendsBaseRule === true
+              rule.meta.docs.extendsBaseRule === true
                 ? file.stem
-                : meta.docs.extendsBaseRule
+                : rule.meta.docs.extendsBaseRule
             }.md`,
             children: [
               {
diff --git a/packages/website/src/components/ErrorsViewer.tsx b/packages/website/src/components/ErrorsViewer.tsx
index 1ea30d5f623f..9e1a57d7cb0d 100644
--- a/packages/website/src/components/ErrorsViewer.tsx
+++ b/packages/website/src/components/ErrorsViewer.tsx
@@ -115,7 +115,7 @@ export function ErrorViewer({
             <h4>{title}</h4>
           </div>
           <pre className={styles.errorPre}>
-            {type === 'danger' ? value?.stack : value.message}
+            {type === 'danger' ? value.stack : value.message}
           </pre>
         </AlertBlock>
       </div>
diff --git a/packages/website/src/components/OptionsSelector.tsx b/packages/website/src/components/OptionsSelector.tsx
index 00870a850c35..b881319e58ab 100644
--- a/packages/website/src/components/OptionsSelector.tsx
+++ b/packages/website/src/components/OptionsSelector.tsx
@@ -57,7 +57,7 @@ function OptionsSelectorContent({
             value={state.ts}
             disabled={!tsVersions.length}
             onChange={(ts): void => setState({ ts })}
-            options={(tsVersions.length && tsVersions) || [state.ts]}
+            options={tsVersions.length ? tsVersions : [state.ts]}
           />
         </InputLabel>
         <InputLabel name="Eslint">{process.env.ESLINT_VERSION}</InputLabel>
diff --git a/packages/website/src/components/ast/DataRenderer.tsx b/packages/website/src/components/ast/DataRenderer.tsx
index 8562b1f4ae38..75a8e010dcc0 100644
--- a/packages/website/src/components/ast/DataRenderer.tsx
+++ b/packages/website/src/components/ast/DataRenderer.tsx
@@ -115,7 +115,7 @@ function RenderExpandableObject({
         <div className={styles.subList}>
           {data.map((dataElement, index) => (
             <DataRender
-              key={dataElement[0] ?? index}
+              key={dataElement[0]}
               field={dataElement[0]}
               value={dataElement[1]}
               lastElement={index === lastIndex}
diff --git a/packages/website/src/components/ast/tsUtils.ts b/packages/website/src/components/ast/tsUtils.ts
index 6d4232a58c78..233a606ed3ca 100644
--- a/packages/website/src/components/ast/tsUtils.ts
+++ b/packages/website/src/components/ast/tsUtils.ts
@@ -65,7 +65,7 @@ export function tsEnumToString(
   type: keyof TsParsedEnums,
   value: number,
 ): string | undefined {
-  return getTsEnum(type)?.[value];
+  return getTsEnum(type)[value];
 }
 
 /**
@@ -75,12 +75,8 @@ export function tsEnumFlagToString(
   type: keyof TsParsedEnums,
   value: number,
 ): string | undefined {
-  const allFlags = getTsEnum(type);
-  if (allFlags) {
-    return Object.entries(allFlags)
-      .filter(([f]) => (Number(f) & value) !== 0)
-      .map(([, name]) => `${type}.${name}`)
-      .join('\n');
-  }
-  return '';
+  return Object.entries(getTsEnum(type))
+    .filter(([f]) => (Number(f) & value) !== 0)
+    .map(([, name]) => `${type}.${name}`)
+    .join('\n');
 }
diff --git a/packages/website/src/components/config/ConfigEditor.tsx b/packages/website/src/components/config/ConfigEditor.tsx
index f34b7662413e..a326a5be2077 100644
--- a/packages/website/src/components/config/ConfigEditor.tsx
+++ b/packages/website/src/components/config/ConfigEditor.tsx
@@ -62,7 +62,7 @@ function ConfigEditorField({
         {item.label && <br />}
         {item.label && <span> {item.label}</span>}
       </span>
-      {(item.type === 'boolean' && (
+      {item.type === 'boolean' ? (
         <Checkbox
           name={`config_${item.key}`}
           value={item.key}
@@ -72,15 +72,16 @@ function ConfigEditorField({
             onChange(item.key, checked ? item.defaults?.[0] ?? true : undefined)
           }
         />
-      )) ||
-        (item.type === 'string' && item.enum && (
+      ) : (
+        item.enum && (
           <Dropdown
             name={`config_${item.key}`}
             value={String(value)}
             options={item.enum}
             onChange={(value): void => onChange(item.key, value)}
           />
-        ))}
+        )
+      )}
     </label>
   );
 }
diff --git a/packages/website/src/components/editor/LoadedEditor.tsx b/packages/website/src/components/editor/LoadedEditor.tsx
index 58ff7d3cd305..f5bc9d244bf1 100644
--- a/packages/website/src/components/editor/LoadedEditor.tsx
+++ b/packages/website/src/components/editor/LoadedEditor.tsx
@@ -267,7 +267,7 @@ export const LoadedEditor: React.FC<LoadedEditorProps> = ({
     return debounce(() => editor.layout(), 1);
   }, [editor]);
 
-  const container = editor.getContainerDomNode?.() ?? editor.getDomNode();
+  const container = editor.getContainerDomNode();
 
   useResizeObserver(container, () => {
     resize();
diff --git a/packages/website/src/components/lib/jsonSchema.ts b/packages/website/src/components/lib/jsonSchema.ts
index 6ea3d4bbc2a5..e5c5801583dd 100644
--- a/packages/website/src/components/lib/jsonSchema.ts
+++ b/packages/website/src/components/lib/jsonSchema.ts
@@ -50,7 +50,7 @@ export function getRuleJsonSchemaWithErrorLevel(
       };
     }
     // example: naming-convention rule
-    if (typeof ruleSchema.items === 'object' && ruleSchema.items) {
+    if (typeof ruleSchema.items === 'object') {
       return {
         ...ruleSchema,
         type: 'array',
diff --git a/packages/website/src/components/lib/markdown.ts b/packages/website/src/components/lib/markdown.ts
index 682378c5a5a6..7e9faaccc02b 100644
--- a/packages/website/src/components/lib/markdown.ts
+++ b/packages/website/src/components/lib/markdown.ts
@@ -66,8 +66,8 @@ export function createMarkdownParams(state: ConfigModel): string {
     title: `Bug: [${onlyRuleName}] <short description of the issue>`,
     'playground-link': document.location.toString(),
     'repro-code': state.code,
-    'eslint-config': `module.exports = ${state.eslintrc ?? '{}'}`,
-    'typescript-config': state.tsconfig ?? '{}',
+    'eslint-config': `module.exports = ${state.eslintrc}`,
+    'typescript-config': state.tsconfig,
     versions: generateVersionsTable(state.ts),
   };
 
diff --git a/packages/website/src/components/typeDetails/TypeInfo.tsx b/packages/website/src/components/typeDetails/TypeInfo.tsx
index 87084650d124..aabac949da07 100644
--- a/packages/website/src/components/typeDetails/TypeInfo.tsx
+++ b/packages/website/src/components/typeDetails/TypeInfo.tsx
@@ -67,7 +67,7 @@ export function TypeInfo({
   onHoverNode,
 }: TypeInfoProps): React.JSX.Element {
   const computed = useMemo(() => {
-    if (!typeChecker || !value) {
+    if (!typeChecker) {
       return undefined;
     }
     const info: InfoModel = {};
diff --git a/packages/website/src/theme/CodeBlock/Content/String.tsx b/packages/website/src/theme/CodeBlock/Content/String.tsx
index e6db6b72a311..6895cab853e2 100644
--- a/packages/website/src/theme/CodeBlock/Content/String.tsx
+++ b/packages/website/src/theme/CodeBlock/Content/String.tsx
@@ -52,7 +52,12 @@ export default function CodeBlockString({
 
   const copiedCode = code
     .split('\n')
-    .filter((c, i) => !lineClassNames[i]?.includes('code-block-removed-line'))
+    .filter(
+      (c, i) =>
+        !(lineClassNames[i] as string[] | undefined)?.includes(
+          'code-block-removed-line',
+        ),
+    )
     .join('\n');
 
   const eslintrcHash = parseEslintrc(metastring);