@naturalcycles/nodejs-lib/dist/stream/transform/transformOffset.js

Standard library for Node.js

import { Transform } from 'node:stream';
import { transformNoOp } from './transformNoOp.js';
export function transformOffset(opt) {
    const { offset } = opt;
    if (!offset) {
        // No offset - returning pass-through transform
        return transformNoOp();
    }
    let i = 0; // so we start first chunk with 1
    return new Transform({
        objectMode: true,
        highWaterMark: 1,
        ...opt,
        transform(chunk, _, cb) {
            if (++i <= offset) {
                return cb(); // skip
            }
            cb(null, chunk);
        },
    });
}