htmlhint
Version:
The Static Code Analysis Tool for your HTML
47 lines • 4.82 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const regular = '(art-lojban|cel-gaulish|no-bok|no-nyn|zh-guoyu|zh-hakka|zh-min|zh-min-nan|zh-xiang)';
const irregular = '(en-GB-oed|i-ami|i-bnn|i-default|i-enochian|i-hak|i-klingon|i-lux|i-mingo|i-navajo|i-pwn|i-tao|i-tay|i-tsu|sgn-BE-FR|sgn-BE-NL|sgn-CH-DE)';
const grandfathered = `(?<grandfathered>${irregular}|${regular})`;
const privateUse = '(?<privateUse>x(-[A-Za-z0-9]{1,8})+)';
const privateUse2 = '(?<privateUse2>x(-[A-Za-z0-9]{1,8})+)';
const singleton = '[0-9A-WY-Za-wy-z]';
const extension = `(?<extension>${singleton}(-[A-Za-z0-9]{2,8})+)`;
const variant = '(?<variant>[A-Za-z0-9]{5,8}|[0-9][A-Za-z0-9]{3})';
const region = '(?<region>[A-Za-z]{2}|[0-9]{3})';
const script = '(?<script>[A-Za-z]{4})';
const extlang = '(?<extlang>[A-Za-z]{3}(-[A-Za-z]{3}){0,2})';
const language = `(?<language>([A-Za-z]{2,3}(-${extlang})?)|[A-Za-z]{4}|[A-Za-z]{5,8})`;
const langtag = `(${language}(-${script})?` +
`(-${region})?` +
`(-${variant})*` +
`(-${extension})*` +
`(-${privateUse})?` +
')';
const languageTag = `(${grandfathered}|${langtag}|${privateUse2})`;
exports.default = {
id: 'html-lang-require',
description: 'The lang attribute of an <html> element must be present and should be valid.',
init(parser, reporter) {
parser.addListener('tagstart', (event) => {
const tagName = event.tagName.toLowerCase();
const mapAttrs = parser.getMapAttrs(event.attrs);
const col = event.col + tagName.length + 1;
const langValidityPattern = new RegExp(languageTag, 'g');
if (tagName === 'html') {
if ('lang' in mapAttrs) {
if (!mapAttrs['lang']) {
reporter.warn('The lang attribute of <html> element must have a value.', event.line, col, this, event.raw);
}
else if (!langValidityPattern.test(mapAttrs['lang'])) {
reporter.warn('The lang attribute value of <html> element must be a valid BCP47.', event.line, col, this, event.raw);
}
}
else {
reporter.warn('An lang attribute must be present on <html> elements.', event.line, col, this, event.raw);
}
}
});
},
};
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