Listens for postMessage events on chat.deepseek.com and logs them
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// ==UserScript==
// @name DeepSeek Native Setter Injector
// @description Listens for postMessage events on chat.deepseek.com and logs them
// @match https://chat.deepseek.com/*
// @version 0.0.1.20250802212301
// @namespace https://greasyfork.org/users/1435046
// ==/UserScript==
(function () {
'use strict';
// Cache the native setter for HTMLTextAreaElement.value
const valueSetter = Object.getOwnPropertyDescriptor(
HTMLTextAreaElement.prototype, 'value'
).set;
window.addEventListener('message', event => {
// find all primary filled buttons
const buttons = document.querySelectorAll(
'div[role="button"].ds-button--primary.ds-button--filled'
);
if (event.data && event.data.type === 'searchButtonClicked') {
// click the one whose visible label is “Search”
for (const btn of buttons) {
if (btn.textContent.trim() === 'Search') {
btn.click();
break;
}
}
return;
}
if (event.data && event.data.type === 'reasonButtonClicked') {
// click the one whose visible label is “DeepThink (R1)”
for (const btn of buttons) {
if (btn.textContent.trim() === 'DeepThink (R1)') {
btn.click();
break;
}
}
return;
}
if (event.data?.type === 'newChatButtonClicked') {
document.querySelector('svg path[d^="M9.10999"]').closest('div').click();
return;
}
let chatMessageInput = document.querySelector('div:has(> div > div > div > div > textarea[id="chat-input"])');
//if event data type is defaultChatMessageInputDisplay
if (event.data?.type === 'defaultChatMessageInputDisplay') {
console.log('default');
if (chatMessageInput) {
chatMessageInput.style.removeProperty('display');
//return
return;
}
}
if (event.data?.type === 'customizeChatMessageInputDisplay') {
console.log('customize');
if (chatMessageInput) {
chatMessageInput.style.display = 'none';
//return
return;
}
}
if (event.data.type !== 'prompt') return;
const textarea = document.getElementById('chat-input');
if (!textarea) return;
// 1. Update both DOM and React state without shifting focus
valueSetter.call(textarea, event.data.content);
// 2. Notify React/Vue/etc. of the change
textarea.dispatchEvent(new InputEvent('input', { bubbles: true }));
// 3. Click the send button if enabled and matching the icon path
const sendBtn = document.querySelector('div[role="button"][aria-disabled="false"]');
if (
sendBtn &&
sendBtn.querySelector('path[d^="M7 16c-.595 0-1.077-.462-1.077"]')
) {
sendBtn.click();
}
});
})();