Can I append more than one item at a time?

Yes, provide multiple items in the append box using the same separator as your main list, and all of them are added in order.

Does this change the order of the existing items?

No, the original list is left exactly as-is; new items are only added after the last existing item.

How is this different from List Item Pusher?

List Item Appender adds items to the end of the list; List Item Pusher adds items to the front. They're mirror-image operations.

What if I want to remove items instead of adding them?

Use List Item Popper to remove items from the end of a list, or Empty List Item Remover to strip out blank items.

List Item Appender - Add Items to the End of a List

Overview

Introduction

Adding a few new entries to an existing list is a common editing step, whether you're extending a to-do list, adding new test values, or building up a dataset incrementally.

List Item Appender adds one or more new items to the end of your list in a single step, without disturbing anything already there.

What Is List Item Appender?

This is a list-editing tool: it takes an existing list and a set of new items, and concatenates the new items onto the end of the existing ones.

Both the base list and the items to append use the same configurable separator, so the operation stays consistent regardless of your list's format.

How List Item Appender Works

The base list and the items-to-append text are each split into arrays using the chosen separator.

The two arrays are concatenated with the append items placed after all existing items, then the combined array is rejoined into the output text.

When To Use List Item Appender

Use this when you have a list you want to extend with new entries without retyping the whole thing.

It pairs naturally with List Item Pusher (prepend instead of append) and List Item Popper (remove from the end instead of adding).

Often used alongside List Item Pusher, List Item Popper and List Duplicator.

Features

Advantages

Preserves the exact order and content of the original list.
Supports appending multiple new items at once, not just one.
Works with any separator style consistently across both inputs.

Limitations

Only adds to the end of the list; use List Item Pusher to add to the front instead.
Doesn't deduplicate, if an appended item already exists in the list, it will appear twice.

Examples

Appending two items to a list

Input

list: a, b — items to append: c, d

Output

a, b, c, d

Both new items are added after the existing two, in the order given.

Appending a single item

Input

list: a, b — items to append: c

Output

a, b, c

One new item is added to the end of the list.

Best Practices & Notes

Best Practices

Keep the same separator for both the base list and the append items to avoid mismatched parsing.
Check for duplicates afterward with List Statistics Generator if your list shouldn't contain repeated values.

Developer Notes

Both inputs are parsed with the shared `splitListItems()` helper, combined with `Array.prototype.concat()` (append array placed second), and rejoined with `joinListItems()`.

List Item Appender Use Cases

Adding newly collected entries to an ongoing dataset
Extending a to-do or checklist with a few more tasks
Appending new test values to an existing test-data list

Common Mistakes

Using a different separator for the append box than the main list, which can cause the new items to be parsed as one combined string.
Expecting duplicates to be automatically removed; they aren't, appended items are added even if they already exist in the list.

Tips

Use List Item Pusher instead if the new items should go at the start of the list rather than the end.
Follow up with List Statistics Generator to double-check the new total item count.

List Item Appender