feat(types): add min_lines/max_lines to RichTextInput by srtaalej · Pull Request #2680 · slackapi/node-slack-sdk

srtaalej · 2026-07-28T21:08:08Z

Summary

Adds optional min_lines and max_lines integer properties to the RichTextInput Block Kit element interface, allowing developers to control the visible height of rich_text_input elements.

min_lines — minimum number of visible lines (1–50)
max_lines — maximum number of visible lines before scrolling (1–50, defaults to 8 on the platform when unset)

Both properties are optional, preserving full backward compatibility.

Testing

Test app.js

import { App } from '@slack/bolt';

const app = new App({
  token: process.env.SLACK_BOT_TOKEN,
  socketMode: true,
  appToken: process.env.SLACK_APP_TOKEN,
});

app.command('/rich-text-test', async ({ ack, client, body }) => {
  await ack();
  await client.views.open({
    trigger_id: body.trigger_id,
    view: {
      type: 'modal',
      title: { type: 'plain_text', text: 'Rich Text Test' },
      submit: { type: 'plain_text', text: 'Submit' },
      blocks: [
        {
          type: 'input',
          block_id: 'rich_text_block',
          label: { type: 'plain_text', text: 'Default (no min/max — should be 8 max)' },
          element: {
            type: 'rich_text_input',
            action_id: 'default_input',
          },
        },
        {
          type: 'input',
          block_id: 'rich_text_min_block',
          label: { type: 'plain_text', text: 'min_lines: 5' },
          element: {
            type: 'rich_text_input',
            action_id: 'min_input',
            min_lines: 5,
          },
        },
        {
          type: 'input',
          block_id: 'rich_text_max_block',
          label: { type: 'plain_text', text: 'max_lines: 16' },
          element: {
            type: 'rich_text_input',
            action_id: 'max_input',
            max_lines: 16,
          },
        },
        {
          type: 'input',
          block_id: 'rich_text_both_block',
          label: { type: 'plain_text', text: 'min_lines: 3, max_lines: 20' },
          element: {
            type: 'rich_text_input',
            action_id: 'both_input',
            min_lines: 3,
            max_lines: 20,
          },
        },
      ],
    },
  });
});

(async () => {
  await app.start();
  app.logger.info('⚡️ Rich Text Test app is running!');
})();

Requirements

I've read and understood the Contributing Guidelines and have done my best effort to follow them.
I've read and agree to the Code of Conduct.

changeset-bot · 2026-07-28T21:08:13Z

🦋 Changeset detected

Latest commit: d2941d3

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@slack/types	Minor

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

codecov · 2026-07-28T21:10:35Z

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.11%. Comparing base (046647f) to head (d2941d3).
⚠️ Report is 3 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2680   +/-   ##
=======================================
  Coverage   89.11%   89.11%           
=======================================
  Files          65       65           
  Lines       10339    10339           
  Branches      471      471           
=======================================
  Hits         9214     9214           
  Misses       1095     1095           
  Partials       30       30

Flag	Coverage Δ
cli-hooks	`89.11% <ø> (ø)`
cli-test	`89.11% <ø> (ø)`
logger	`89.11% <ø> (ø)`
oauth	`89.11% <ø> (ø)`
socket-mode	`89.11% <ø> (ø)`
web-api	`89.11% <ø> (ø)`
webhook	`89.11% <ø> (ø)`

Flags with carried forward coverage won't be shown. Click here to find out more.

🚀 New features to boost your workflow:

📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

zimeg

@srtaalej LGTM and thank you for updating these block inputs 📝

I'm approving now with a note that the JSDoc might need updating to match the backend capabilities of the moment. When confident please do feel free to merge this 🚢 💨

zimeg · 2026-07-28T21:25:03Z

   */
  initial_value?: RichTextBlock;
+  /**
+   * @description The minimum number of lines of text shown in the input. Must be between 1 and 50.


Suggested change

* @description The minimum number of lines of text shown in the input. Must be between 1 and 50.

* @description The minimum number of lines of text shown in the input. Must be between 1 and 100.

🔬 question: I find the API docs suggest "100" as a maximum minimum - would this be something to update here or in reference?

The minimum number of visible text lines the input should display before scrolling. Controls the initial height of the input. Must be between 1 and 100.

🔗 https://docs.slack.dev/reference/block-kit/block-elements/rich-text-input-element/

zimeg · 2026-07-28T21:25:24Z

+   */
+  min_lines?: number;
+  /**
+   * @description The maximum number of lines of text shown in the input before it scrolls. Must be between 1 and 50.


Suggested change

* @description The maximum number of lines of text shown in the input before it scrolls. Must be between 1 and 50.

* @description The maximum number of lines of text shown in the input before it scrolls. Must be between 1 and 100.

🦠 note: Similar suggestion as above!

zimeg · 2026-07-28T21:26:40Z

+// RichTextInput — sad paths
+expectError<RichTextInput>({
+  type: 'rich_text_input',
+  min_lines: '3',


Suggested change

min_lines: '3',

min_lines: '3', // Minimum should be integer

🧪 suggestion(non-blocking): To make these spec more clear!

zimeg · 2026-07-28T21:27:20Z

🌟 praise: Thanks for keeping qualities highest with test! I'm hoping we can organize this file as more coverage is added for other elements ongoing.

srtaalej added 3 commits July 28, 2026 17:06

feat(types): add min_lines and max_lines to RichTextInput

7233ce9

test(types): add type tests for RichTextInput min_lines/max_lines

acf41b0

chore: add changeset for RichTextInput min_lines/max_lines

d2941d3

srtaalej self-assigned this Jul 28, 2026

srtaalej added enhancement M-T: A feature request for new functionality pkg:types applies to `@slack/types` semver:minor labels Jul 28, 2026

srtaalej marked this pull request as ready for review July 28, 2026 21:21

srtaalej requested a review from a team as a code owner July 28, 2026 21:21

srtaalej requested a review from zimeg July 28, 2026 21:21

zimeg added this to the types@next milestone Jul 28, 2026

zimeg approved these changes Jul 28, 2026

View reviewed changes

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

feat(types): add min_lines/max_lines to RichTextInput - #2680

feat(types): add min_lines/max_lines to RichTextInput#2680
srtaalej wants to merge 3 commits into
mainfrom
feat/rich-text-input-min-max-lines

srtaalej commented Jul 28, 2026 •

edited

Loading

Uh oh!

changeset-bot Bot commented Jul 28, 2026

Uh oh!

codecov Bot commented Jul 28, 2026

Uh oh!

zimeg left a comment

Uh oh!

zimeg Jul 28, 2026

Uh oh!

zimeg Jul 28, 2026

Uh oh!

zimeg Jul 28, 2026

Uh oh!

zimeg Jul 28, 2026

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

2 participants

	* @description The minimum number of lines of text shown in the input. Must be between 1 and 50.
	* @description The minimum number of lines of text shown in the input. Must be between 1 and 100.

	* @description The maximum number of lines of text shown in the input before it scrolls. Must be between 1 and 50.
	* @description The maximum number of lines of text shown in the input before it scrolls. Must be between 1 and 100.

Uh oh!

Conversation

srtaalej commented Jul 28, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Summary

Testing

Requirements

Uh oh!

changeset-bot Bot commented Jul 28, 2026

🦋 Changeset detected

Uh oh!

codecov Bot commented Jul 28, 2026

Codecov Report

Uh oh!

zimeg left a comment

Choose a reason for hiding this comment

Uh oh!

zimeg Jul 28, 2026

Choose a reason for hiding this comment

Uh oh!

zimeg Jul 28, 2026

Choose a reason for hiding this comment

Uh oh!

zimeg Jul 28, 2026

Choose a reason for hiding this comment

Uh oh!

zimeg Jul 28, 2026

Choose a reason for hiding this comment

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

2 participants

srtaalej commented Jul 28, 2026 •

edited

Loading