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[PR #20880] [CLOSED] feat: support initMessage query param for auto-submitting prompt on load #64663

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opened 2026-05-06 10:18:35 -05:00 by GiteaMirror · 0 comments
GiteaMirror commented 2026-05-06 10:18:35 -05:00
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📋 Pull Request Information

Original PR: https://github.com/open-webui/open-webui/pull/20880
Author: @ragaslan
Created: 1/22/2026
Status: ❌ Closed

Base: dev ← Head: feature/starting-with-initial-message

📝 Commits (10+)

📊 Changes

1 file changed (+12 additions, -0 deletions)

View changed files

📝 src/lib/components/chat/Chat.svelte (+12 -0)

📄 Description

What does this PR do?

This PR adds support for sending an initial chat input to OpenWebUI when it is loaded inside an iframe. The chat message input can be optionally initialized via a URL query parameter, allowing the host application to automatically submit a text or prompt as soon as the iframe is ready.

gercek-ezgif com-video-to-gif-converter

Why is this needed?

When OpenWebUI is embedded in a cross-origin iframe, the parent application currently has no reliable way to send an initial prompt without user interaction. So we can give an initial message to open-webui iframe in the parent origin easily.

How does it work?

  • Reads an optional initMessage query parameter from the iframe URL
  • On mount, sends a postMessage event to the window with the provided prompt

How was this tested?

  • Embedded OpenWebUI in a host application running on a different port and domain
  • Verified that the initial postMessage is received by the window on load
  • Tested in Chrome

Additional Information

Screenshots or Videos

Example of usage

{0232BD7B-7A3F-4A4A-BD90-059EC7A46623}

Contributor License Agreement

By submitting this pull request, I confirm that I have read and fully agree to the Contributor License Agreement (CLA), and I am providing my contributions under its terms.

Note

Deleting the CLA section will lead to immediate closure of your PR and it will not be merged in.

🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.

## 📋 Pull Request Information **Original PR:** https://github.com/open-webui/open-webui/pull/20880 **Author:** [@ragaslan](https://github.com/ragaslan) **Created:** 1/22/2026 **Status:** ❌ Closed **Base:** `dev` ← **Head:** `feature/starting-with-initial-message` --- ### 📝 Commits (10+) - [`fe6783c`](https://github.com/open-webui/open-webui/commit/fe6783c16699911c7be17392596d579333fb110c) Merge pull request #19030 from open-webui/dev - [`fc05e0a`](https://github.com/open-webui/open-webui/commit/fc05e0a6c5d39da60b603b4d520f800d6e36f748) Merge pull request #19405 from open-webui/dev - [`e3faec6`](https://github.com/open-webui/open-webui/commit/e3faec62c58e3a83d89aa3df539feacefa125e0c) Merge pull request #19416 from open-webui/dev - [`9899293`](https://github.com/open-webui/open-webui/commit/9899293f050ad50ae12024cbebee7e018acd851e) Merge pull request #19448 from open-webui/dev - [`140605e`](https://github.com/open-webui/open-webui/commit/140605e660b8186a7d5c79fb3be6ffb147a2f498) Merge pull request #19462 from open-webui/dev - [`6f1486f`](https://github.com/open-webui/open-webui/commit/6f1486ffd0cb288d0e21f41845361924e0d742b3) Merge pull request #19466 from open-webui/dev - [`d95f533`](https://github.com/open-webui/open-webui/commit/d95f533214e3fe5beb5e41ec1f349940bc4c7043) Merge pull request #19729 from open-webui/dev - [`a727153`](https://github.com/open-webui/open-webui/commit/a7271532f8a38da46785afcaa7e65f9a45e7d753) 0.6.43 (#20093) - [`6adde20`](https://github.com/open-webui/open-webui/commit/6adde203cd292a9e3af9c64a2ae36b603fed096a) Merge pull request #20394 from open-webui/dev - [`f9b0534`](https://github.com/open-webui/open-webui/commit/f9b0534e0c442631d1cb7205169588b9b6204179) Merge pull request #20522 from open-webui/dev ### 📊 Changes **1 file changed** (+12 additions, -0 deletions) <details> <summary>View changed files</summary> 📝 `src/lib/components/chat/Chat.svelte` (+12 -0) </details> ### 📄 Description # What does this PR do? This PR adds support for sending an initial chat input to OpenWebUI when it is loaded inside an iframe. The chat message input can be optionally initialized via a URL query parameter, allowing the host application to automatically submit a text or prompt as soon as the **iframe** is ready. ![gercek-ezgif com-video-to-gif-converter](https://github.com/user-attachments/assets/f321cf01-46b5-408a-9583-77692ee43f59) ## Why is this needed? When OpenWebUI is embedded in a cross-origin iframe, the parent application currently has no reliable way to send an initial prompt without user interaction. **So we can give an initial message to open-webui iframe in the parent origin easily.** ## How does it work? - Reads an optional initMessage query parameter from the iframe URL - On mount, sends a postMessage event to the window with the provided prompt ## How was this tested? - Embedded OpenWebUI in a host application running on a different port and domain - Verified that the initial postMessage is received by the window on load - Tested in Chrome ## Additional Information ## Screenshots or Videos ### Example of usage <img width="748" height="298" alt="{0232BD7B-7A3F-4A4A-BD90-059EC7A46623}" src="https://github.com/user-attachments/assets/39617d07-1cdc-419a-b507-1a9e256146f8" /> ### Contributor License Agreement By submitting this pull request, I confirm that I have read and fully agree to the [Contributor License Agreement (CLA)](https://github.com/open-webui/open-webui/blob/main/CONTRIBUTOR_LICENSE_AGREEMENT), and I am providing my contributions under its terms. > [!NOTE] > Deleting the CLA section will lead to immediate closure of your PR and it will not be merged in. --- <sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>
GiteaMirror added the pull-request label 2026-05-06 10:18:35 -05:00
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Reference: github-starred/open-webui#64663
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