lib/rules/no-unsupported-features.js
function hasPattern(s, pattern) {
    const m = pattern.exec(s)
    return m != null && (m[1] || "").length % 2 === 0
}
function hasPattern(s, pattern) {
    const m = pattern.exec(s)
    return m != null && (m[1] || "").length % 2 === 0
}
Check a given string has a given pattern.
@param {string} s A string to check.
@param {RegExp} pattern A RegExp object to check.
@returns {boolean} `true` if the string has the pattern.