htmlhint/dist/core/rules/attr-unsafe-chars.js

The Static Code Analysis Tool for your HTML

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = {
    id: 'attr-unsafe-chars',
    description: 'Attribute values cannot contain unsafe chars.',
    init(parser, reporter) {
        parser.addListener('tagstart', (event) => {
            const attrs = event.attrs;
            let attr;
            const col = event.col + event.tagName.length + 1;
            const regUnsafe = /[\u0000-\u0008\u000b\u000c\u000e-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/;
            let match;
            for (let i = 0, l = attrs.length; i < l; i++) {
                attr = attrs[i];
                match = regUnsafe.exec(attr.value);
                if (match !== null) {
                    const unsafeCode = escape(match[0])
                        .replace(/%u/, '\\u')
                        .replace(/%/, '\\x');
                    reporter.warn(`The value of attribute [ ${attr.name} ] cannot contain an unsafe char [ ${unsafeCode} ].`, event.line, col + attr.index, this, attr.raw);
                }
            }
        });
    },
};
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