const regex = /[^\w\s]+/ug;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('[^\\w\\s]+', 'ug')
const str = `Как выбрать все спецсимволы регулярным выражением?
Всем привет! Подскажите, как выбрать все спциальные символы?
Всякие доллары, + ~ стрелки и прочую дичь`;
// Reset `lastIndex` if this regex is defined globally
// regex.lastIndex = 0;
let m;
while ((m = regex.exec(str)) !== null) {
    // This is necessary to avoid infinite loops with zero-width matches
    if (m.index === regex.lastIndex) {
        regex.lastIndex++;
    }
    
    // The result can be accessed through the `m`-variable.
    m.forEach((match, groupIndex) => {
        console.log(`Found match, group ${groupIndex}: ${match}`);
    });
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions