htmllint/lib/rules/attr-no-dup.js

An unofficial html5 linter.

var Issue = require('../issue');

module.exports = {
    name: 'attr-no-dup',
    on: ['tag'],
    desc: 'If set, the same attribute name cannot be repeated within a single tag.'
};

module.exports.lint = function (element, opts) {
    return element.dupes.map(function (n) {
        var a = element.attribs[n];

        return new Issue('E003', a.nameLineCol, { attribute: n });
    });
};