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Нужна помощь по JS


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Контрольная?

Нет, просто есть скаченный из интернета скрипт. А мне нужно составить блок схему алгоритма его работы. Некоторые моменты скрипта мне не понятны. Подскажите что-нибудь.

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1) newstr = str.replace(/\n+/g, ' ');

Превращение многострочного текста в однострочный.

2) str = str.slice(0, 100);

Обрезаем 100 первых символов из строки

3) if(document.getSelection()) {

Если есть какое-то выделение на странице...

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