精简chatGPT 里面的对话，只剩下最新的4个对话
// ==UserScript==
// @name ChatGPT Condenser
// @namespace http://tampermonkey.net/
// @version 2026-02-27
// @description 精简chatGPT 里面的对话，只剩下最新的4个对话
// @author You
// @match https://chatgpt.com/*
// @icon https://www.google.com/s2/favicons?sz=64&domain=chatgpt.com
// @license All Rights Reserved
// @run-at document-end
// ==/UserScript==
(function () {
'use strict';
// 插入样式
const style = document.createElement('style');
style.textContent = `
#tm-float-btn {
position: fixed;
right: 20px;
bottom: 90px; /* 右下角往上一点：数值越大越靠上 */
z-index: 2147483647;
padding: 10px 14px;
border: 0;
border-radius: 999px;
background: #57c7ff; /* 天蓝色 */
color: #0b2a3a;
font-size: 14px;
line-height: 1;
cursor: pointer;
box-shadow: 0 6px 18px rgba(0,0,0,.25);
user-select: none;
}
#tm-float-btn:hover { filter: brightness(0.95); }
#tm-float-btn:active { transform: scale(.98); }
`;
(document.head || document.documentElement).appendChild(style);
// 创建按钮
const btn = document.createElement('button');
btn.id = 'tm-float-btn';
btn.type = 'button';
btn.textContent = '点击触发';
btn.addEventListener('click', () => {
// 这里就有两个严重逻辑漏洞
/*
1. 删除element时候 循环里面判断变量用的是ele.length 删一个少一个。所以像删只剩下4个，但是删除的更少
2. 换个变量存储总大小，在删除。此时删除的是ele[i] 此时因为ele少了，所以删到最后 i越来越大 ele数组大小越来越少 就越界了
*/
var ele = document.getElementsByClassName("text-token-text-primary w-full");
console.log(ele.length);
var ele_length = ele.length - 4;
for(var i = 0; i < ele_length; i++){
ele[0].remove();
}
});
(document.body || document.documentElement).appendChild(btn);
})();
(function () {
'use strict';
// ====== Styles ======
const style = document.createElement('style');
style.textContent = `
#tm-float-btn {
position: fixed;
right: 20px;
bottom: 20%; /* 越大越靠上 */
z-index: 2147483647;
padding: 10px 14px;
border: 0;
border-radius: 999px;
background: #57c7ff; /* 天蓝色 */
color: #0b2a3a;
font-size: 14px;
line-height: 1;
cursor: pointer;
box-shadow: 0 6px 18px rgba(0,0,0,.25);
user-select: none;
}
#tm-float-btn:hover { filter: brightness(0.95); }
#tm-float-btn:active { transform: scale(.98); }
/* Toast */
.tm-toast {
position: fixed;
top: 18%;
left: 50%;
transform: translateX(-50%);
z-index: 2147483647;
padding: 12px 16px;
border-radius: 12px;
background: rgba(0, 0, 0, 0.78);
color: #fff;
font-size: 40px;
line-height: 1.4;
box-shadow: 0 10px 28px rgba(0,0,0,.28);
opacity: 0;
transition: opacity 240ms ease, transform 240ms ease;
pointer-events: none;
white-space: nowrap;
}
.tm-toast.tm-toast-show {
opacity: 1;
transform: translateX(-50%) translateY(0);
}
.tm-toast.tm-toast-hide {
opacity: 0;
transform: translateX(-50%) translateY(-8px);
}
`;
(document.head || document.documentElement).appendChild(style);
// ====== Toast helper ======
let toastEl = null;
let toastTimer1 = null;
let toastTimer2 = null;
function showToast(message, waitMs = 2000, fadeMs = 600) {
// 若已有 toast，先清理
if (toastEl) {
toastEl.remove();
toastEl = null;
}
if (toastTimer1) clearTimeout(toastTimer1);
if (toastTimer2) clearTimeout(toastTimer2);
toastEl = document.createElement('div');
toastEl.className = 'tm-toast';
toastEl.textContent = message;
(document.body || document.documentElement).appendChild(toastEl);
// 触发进入动画
requestAnimationFrame(() => {
toastEl.classList.add('tm-toast-show');
});
// 2秒后开始淡出
toastTimer1 = setTimeout(() => {
if (!toastEl) return;
toastEl.classList.add('tm-toast-hide');
// 淡出结束后移除
toastTimer2 = setTimeout(() => {
toastEl?.remove();
toastEl = null;
}, fadeMs);
}, waitMs);
}
// ====== Button ======
const btn = document.createElement('button');
btn.id = 'tm-float-btn';
btn.type = 'button';
btn.textContent = '点击触发';
btn.addEventListener('click', async () => {
var ele = document.getElementsByClassName("text-token-text-primary w-full");
console.log(ele.length);
var ele_length = ele.length;
for(var i = 0; i < ele_length-8; i++){
ele[0].remove();
}
showToast("原大小: " + (ele_length) + " 删除后: " + ele.length, 1000, 500);
});
(document.body || document.documentElement).appendChild(btn);
})();