react-code-dataset
/
next.js
/packages
/eslint-plugin-next
/src
/rules
/no-title-in-document-head.ts
| import { defineRule } from '../utils/define-rule' | |
| const url = 'https://nextjs.org/docs/messages/no-title-in-document-head' | |
| export = defineRule({ | |
| meta: { | |
| docs: { | |
| description: | |
| 'Prevent usage of `<title>` with `Head` component from `next/document`.', | |
| recommended: true, | |
| url, | |
| }, | |
| type: 'problem', | |
| schema: [], | |
| }, | |
| create(context) { | |
| let headFromNextDocument = false | |
| return { | |
| ImportDeclaration(node) { | |
| if (node.source.value === 'next/document') { | |
| if (node.specifiers.some(({ local }) => local.name === 'Head')) { | |
| headFromNextDocument = true | |
| } | |
| } | |
| }, | |
| JSXElement(node) { | |
| if (!headFromNextDocument) { | |
| return | |
| } | |
| if ( | |
| node.openingElement && | |
| node.openingElement.name && | |
| node.openingElement.name.name !== 'Head' | |
| ) { | |
| return | |
| } | |
| const titleTag = node.children.find( | |
| (child) => | |
| child.openingElement && | |
| child.openingElement.name && | |
| child.openingElement.name.type === 'JSXIdentifier' && | |
| child.openingElement.name.name === 'title' | |
| ) | |
| if (titleTag) { | |
| context.report({ | |
| node: titleTag, | |
| message: `Do not use \`<title>\` element with \`<Head />\` component from \`next/document\`. Titles should defined at the page-level using \`<Head />\` from \`next/head\` instead. See: ${url}`, | |
| }) | |
| } | |
| }, | |
| } | |
| }, | |
| }) | |