@yookue/ts-lang-utils/dist/esm/util/ArrayUtils/insert.js

Common lang utilities for typescript

export function insert(array, index, elements) {
  if (index === undefined || !elements || !elements.length) {
    return array;
  }
  if (!array || !array.length) {
    return elements;
  }
  if (index < 0 || index >= array.length) {
    return array.concat(elements);
  } else if (index === 0) {
    return elements.concat(array);
  }
  var order = Math.min(index, array.length);
  return array.slice(0, order).concat(elements).concat(array.slice(order));
}