css-tree/lib/tokenizer/adopt-buffer.js

A tool set for CSS: fast detailed parser (CSS → AST), walker (AST traversal), generator (AST → CSS) and lexer (validation and matching) based on specs and browser implementations

const MIN_SIZE = 16 * 1024;

export function adoptBuffer(buffer = null, size) {
    if (buffer === null || buffer.length < size) {
        return new Uint32Array(Math.max(size + 1024, MIN_SIZE));
    }

    return buffer;
};