Fix CJK IME Enter Issue on Claude.ai

gistfile1.txt

// ==UserScript==
// @name         Fix CJK IME Enter Issue on Claude.ai (Extended Blocking)
// @namespace    https://claude.ai/
// @version      0.6
// @description  Block Enter across keydown/keypress/keyup, use stopImmediatePropagation, and a short time window after compositionend.
// @match        https://claude.ai/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    let imeActive = false;
    let imeRecentlyEnded = false;
    let imeTimeout = null;

    // 监听输入法事件
    document.addEventListener('compositionstart', (e) => {
        imeActive = true;
    }, true);

    document.addEventListener('compositionend', (e) => {
        imeActive = false;
        imeRecentlyEnded = true;
        if (imeTimeout) clearTimeout(imeTimeout);
        imeTimeout = setTimeout(() => {
            imeRecentlyEnded = false;
        }, 200); // 稍微延长时间窗口为 200ms
    }, true);

    // 定义一个事件处理函数，覆盖 keydown/keypress/keyup
    const handleKeyEvent = (e) => {
        const isEnter = (e.key === 'Enter' || e.keyCode === 13);
        const isIOSComposition = (e.keyCode === 229); // iOS IME Enter often gives code=229
        const shouldBlock = isEnter && (imeActive || imeRecentlyEnded || isIOSComposition);

        if (shouldBlock) {
            e.preventDefault();
            e.stopPropagation();
            if (e.stopImmediatePropagation) {
                e.stopImmediatePropagation();
            }
        }
    };

    // 对 keydown/keypress/keyup 都进行捕获阶段监听
    window.addEventListener("keydown", handleKeyEvent, true);
})();c