/
no-page-custom-font.js
55 lines (50 loc) · 1.59 KB
/
no-page-custom-font.js
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const NodeAttributes = require('../utils/nodeAttributes.js')
module.exports = {
meta: {
docs: {
description:
'Recommend adding custom font in a custom document and not in a specific page',
recommended: true,
},
},
create: function (context) {
let documentImport = false
return {
ImportDeclaration(node) {
if (node.source.value === 'next/document') {
if (node.specifiers.some(({ local }) => local.name === 'Document')) {
documentImport = true
}
}
},
JSXOpeningElement(node) {
const documentClass = context
.getAncestors()
.find(
(ancestorNode) =>
ancestorNode.type === 'ClassDeclaration' &&
ancestorNode.superClass &&
ancestorNode.superClass.name === 'Document'
)
if ((documentImport && documentClass) || node.name.name !== 'link') {
return
}
const attributes = new NodeAttributes(node)
if (!attributes.has('href') || !attributes.hasValue('href')) {
return
}
const hrefValue = attributes.value('href')
const isGoogleFont =
typeof hrefValue === 'string' &&
hrefValue.startsWith('https://fonts.googleapis.com/css')
if (isGoogleFont) {
context.report({
node,
message:
'Custom fonts not added at the document level will only load for a single page. This is discouraged. See https://nextjs.org/docs/messages/no-page-custom-font.',
})
}
},
}
},
}