Listens for postMessage events on chat.deepseek.com and logs them
// ==UserScript==
// @name DeepSeek Native Setter Injector
// @description Listens for postMessage events on chat.deepseek.com and logs them
// @match https://chat.deepseek.com/*
// @version 0.0.1.20250516100152
// @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;
}
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
const sendBtn = document.querySelector('div[role="button"][aria-disabled="false"]');
if (sendBtn) sendBtn.click();
});
})();