hd-utils/lib/utils/string/breakStrAfterNChar.js

A handy utils for modern JS developers

import isWhiteSpace from "../validation/isWhiteSpace";
/**
 * @description It will break the passed string into multiline string after a cretin length
 * @example breakStrAfterNChar("Javascript") => `Java
 * scri
 * pt`
 */
export default function breakStrAfterNChar(str, maxWidth) {
    const newLineStr = '\n';
    let wrappedText = '';
    let prefix = '';
    while (str.length > maxWidth) {
        let found = false;
        // Insert a new line at the first whitespace of the line
        for (let i = maxWidth - 1; i >= 0; i--) {
            if (isWhiteSpace(str.charAt(i))) {
                wrappedText = wrappedText + [str.slice(0, i), newLineStr].join('');
                str = str.slice(i + 1);
                found = true;
                break;
            }
        }
        // Insert a new line at the maxWidth position, the word is too long to wrap
        if (!found) {
            wrappedText += [str.slice(0, maxWidth), newLineStr].join('');
            str = str.slice(maxWidth);
        }
    }
    return prefix + wrappedText + str;
}