@opra/common/esm/document/utils/parse-regexp.util.js

Opra common package

export function parseRegExp(str, options) {
    const i = str.lastIndexOf('/');
    if (str.startsWith('/') && i) {
        const s = str.substring(1, i);
        let flags = str.substring(i + 1);
        if (options?.includeFlags) {
            for (const f of options.includeFlags)
                if (!flags.includes(f))
                    flags += f;
        }
        if (options?.excludeFlags) {
            for (const f of options.excludeFlags)
                flags.replace(f, '');
        }
        return new RegExp(s, flags);
    }
    throw new TypeError(`"${str}" is not a valid RegExp string`);
}