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feat(linter): eslint-plugin-next: no-head-element (#2006)
Part of: https://github.com/oxc-project/oxc/issues/1929 Based on: - code: https://github.com/vercel/next.js/blob/canary/packages/eslint-plugin-next/src/rules/no-head-element.ts - test: https://github.com/vercel/next.js/blob/canary/test/unit/eslint-plugin-next/no-head-element.test.ts - doc: https://nextjs.org/docs/messages/no-head-element --------- Co-authored-by: Cameron Clark <cameron.clark@hey.com>
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kaykdm
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@ -284,6 +284,7 @@ mod nextjs {
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pub mod no_assign_module_variable;
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pub mod no_async_client_component;
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pub mod no_css_tags;
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pub mod no_head_element;
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pub mod no_head_import_in_document;
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pub mod no_img_element;
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pub mod no_script_component_in_head;
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@ -543,6 +544,7 @@ oxc_macros::declare_all_lint_rules! {
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nextjs::no_assign_module_variable,
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nextjs::no_async_client_component,
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nextjs::no_css_tags,
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nextjs::no_head_element,
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nextjs::no_head_import_in_document,
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nextjs::no_img_element,
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nextjs::no_script_component_in_head,
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171
crates/oxc_linter/src/rules/nextjs/no_head_element.rs
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171
crates/oxc_linter/src/rules/nextjs/no_head_element.rs
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@ -0,0 +1,171 @@
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use oxc_ast::{ast::JSXElementName, AstKind};
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use oxc_diagnostics::{
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miette::{self, Diagnostic},
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thiserror::Error,
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};
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use oxc_macros::declare_oxc_lint;
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use oxc_span::Span;
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use crate::{context::LintContext, rule::Rule, AstNode};
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#[derive(Debug, Error, Diagnostic)]
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#[error("eslint-plugin-next(no-head-element): Do not use `<head>` element. Use `<Head />` from `next/head` instead.")]
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#[diagnostic(severity(warning), help("See https://nextjs.org/docs/messages/no-head-element"))]
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struct NoHeadElementDiagnostic(#[label] pub Span);
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#[derive(Debug, Default, Clone)]
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pub struct NoHeadElement;
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declare_oxc_lint!(
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/// ### What it does
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/// Prevent usage of `<head>` element.
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///
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/// ### Why is this bad?
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///
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///
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/// ### Example
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/// ```javascript
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/// ```
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NoHeadElement,
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correctness
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);
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impl Rule for NoHeadElement {
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fn run<'a>(&self, node: &AstNode<'a>, ctx: &LintContext<'a>) {
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let Some(full_file_path) = ctx.file_path().to_str() else { return };
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let is_in_app_dir = full_file_path.contains("app/") || full_file_path.contains("app\\");
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if is_in_app_dir {
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return;
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}
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if let AstKind::JSXOpeningElement(elem) = node.kind() {
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let JSXElementName::Identifier(id) = &elem.name else { return };
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if id.name == "head" {
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ctx.diagnostic(NoHeadElementDiagnostic(elem.span));
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}
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}
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}
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}
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#[test]
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fn test() {
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use crate::tester::Tester;
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use std::path::PathBuf;
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let pass = vec![
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(
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r"import Head from 'next/head';
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export class MyComponent {
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render() {
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return (
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<div>
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<Head>
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<title>My page title</title>
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</Head>
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</div>
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);
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}
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}
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",
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None,
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None,
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Some(PathBuf::from("pages/index.js")),
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),
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(
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r"import Head from 'next/head';
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export class MyComponent {
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render() {
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return (
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<div>
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<Head>
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<title>My page title</title>
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</Head>
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</div>
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);
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}
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}
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",
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None,
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None,
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Some(PathBuf::from("pages/index.tsx")),
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),
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(
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r"
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export default function Layout({ children }) {
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return (
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<html>
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<head>
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<title>layout</title>
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</head>
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<body>{children}</body>
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</html>
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);
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}
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",
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None,
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None,
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Some(PathBuf::from("./app/layout.js")),
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),
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(
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r"
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export default function Layout({ children }) {
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return (
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<html>
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<head>
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<title>layout</title>
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</head>
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<body>{children}</body>
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</html>
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);
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}
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",
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None,
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None,
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Some(PathBuf::from("./app/layout.js")),
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),
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];
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let fail = vec![
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(
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r"
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export class MyComponent {
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render() {
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return (
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<div>
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<head>
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<title>My page title</title>
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</head>
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</div>
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);
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}
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}",
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None,
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None,
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Some(PathBuf::from("./pages/index.js")),
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),
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(
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r"import Head from 'next/head';
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export class MyComponent {
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render() {
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return (
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<div>
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<head>
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<title>My page title</title>
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</head>
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<Head>
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<title>My page title</title>
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</Head>
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</div>
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);
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}
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}",
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None,
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None,
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Some(PathBuf::from("pages/index.tsx")),
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),
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];
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Tester::new(NoHeadElement::NAME, pass, fail).test_and_snapshot();
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}
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23
crates/oxc_linter/src/snapshots/no_head_element.snap
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23
crates/oxc_linter/src/snapshots/no_head_element.snap
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@ -0,0 +1,23 @@
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---
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source: crates/oxc_linter/src/tester.rs
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expression: no_head_element
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---
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⚠ eslint-plugin-next(no-head-element): Do not use `<head>` element. Use `<Head />` from `next/head` instead.
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╭─[no_head_element.tsx:5:1]
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5 │ <div>
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6 │ <head>
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· ──────
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7 │ <title>My page title</title>
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╰────
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help: See https://nextjs.org/docs/messages/no-head-element
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⚠ eslint-plugin-next(no-head-element): Do not use `<head>` element. Use `<Head />` from `next/head` instead.
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╭─[no_head_element.tsx:6:1]
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6 │ <div>
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7 │ <head>
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· ──────
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8 │ <title>My page title</title>
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╰────
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help: See https://nextjs.org/docs/messages/no-head-element
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