@shelf/fast-chunk-string/lib/index.js

Chunk string into equal substrings with unicode support

import runes from 'runes';
import stringLength from 'string-length';
function fastChunkString(str, { size, unicodeAware = false, }) {
    str = str || '';
    if (!unicodeAware) {
        return getChunks(str, size);
    }
    return getChunksUnicode(str, size);
}
function getChunks(str, size) {
    const strLength = str.length;
    const numChunks = Math.ceil(strLength / size);
    const chunks = new Array(numChunks);
    let i = 0;
    let o = 0;
    for (; i < numChunks; ++i, o += size) {
        chunks[i] = str.substr(o, size);
    }
    return chunks;
}
function getChunksUnicode(str, size) {
    const strLength = stringLength(str);
    const numChunks = Math.ceil(strLength / size);
    const chunks = new Array(numChunks);
    let i = 0;
    let o = 0;
    const runeChars = runes(str);
    for (; i < numChunks; ++i, o += size) {
        chunks[i] = runeChars.slice(o, o + size).join('');
    }
    return chunks;
}
export default fastChunkString;