Blurs everything after the first “(”. Tap/click toggles ONE span and swallows the event. “;”, “:” or Alt +D toggles ALL in one keystroke; never selects an answer, never scrolls.
当前为
// ==UserScript==
// @name Quizlet MCQ Explanation Blur (tap + “;”, “:”, or Alt +D toggle)
// @namespace http://tampermonkey.net/
// @version 3.3
// @description Blurs everything after the first “(”. Tap/click toggles ONE span and swallows the event. “;”, “:” or Alt +D toggles ALL in one keystroke; never selects an answer, never scrolls.
// @match *://*.quizlet.com/*
// @grant none
// @run-at document-start
// ==/UserScript==
(() => {
'use strict';
/* ───── selectors & flags ───── */
const OPTION_SEL = ['option-1','option-2','option-3','option-4']
.map(id => `[data-testid="${id}"]`).join(',');
const BLUR = 'qz-blur';
const FLAG = 'data-qz-unblurred';
/* ───── style ───── */
document.addEventListener('DOMContentLoaded', () => {
if (!document.getElementById('qz-blur-style')) {
const s = document.createElement('style');
s.id = 'qz-blur-style';
s.textContent = `
.${BLUR}{
filter:blur(4px)!important;
user-select:none!important;
cursor:pointer;
transition:filter .12s;
}`;
document.head.appendChild(s);
}
}, { once:true });
/* ───── blur insertion ───── */
const blurAfterFirstParen = el => {
if (el.dataset.processed) return;
el.dataset.processed = '1';
for (const n of Array.from(el.childNodes)) {
if (n.nodeType === 3 && n.textContent.includes('(')) {
const txt = n.textContent;
const i = txt.indexOf('(');
const frag = document.createDocumentFragment();
if (i) frag.appendChild(document.createTextNode(txt.slice(0, i)));
const span = document.createElement('span');
span.textContent = txt.slice(i);
span.classList.add(BLUR);
frag.appendChild(span);
el.replaceChild(frag, n);
} else if (n.nodeType === 1) {
blurAfterFirstParen(n);
}
}
};
const addBlurs = () =>
document.querySelectorAll(OPTION_SEL).forEach(blurAfterFirstParen);
new MutationObserver(addBlurs)
.observe(document, { childList:true, subtree:true });
/* ───── helpers ───── */
const isBlurSpan = el =>
el && (el.classList?.contains(BLUR) || el.hasAttribute(FLAG));
const toggleSpanState = span => {
if (span.classList.contains(BLUR)) {
span.classList.remove(BLUR);
span.setAttribute(FLAG,'1');
} else {
span.classList.add(BLUR);
span.removeAttribute(FLAG);
}
};
/* ───── per-span toggle & full event-swallow ───── */
const swallow = e => {
if (!isBlurSpan(e.target)) return;
e.preventDefault();
e.stopImmediatePropagation();
};
// Capture early enough to pre-empt Quizlet’s own handlers.
['pointerdown','pointerup','click','touchstart','touchend','mousedown','mouseup'].forEach(evt =>
document.addEventListener(evt, e => {
if (!isBlurSpan(e.target)) return;
swallow(e);
if (evt === 'pointerup' || evt === 'touchend' || evt === 'mouseup') toggleSpanState(e.target);
}, true)
);
/* ───── global toggle keys ───── */
const isToggleKey = e => {
const semicolon = (e.code === 'Semicolon') && !e.ctrlKey && !e.metaKey && !e.altKey;
const altD = (e.code === 'KeyD') && e.altKey && !e.ctrlKey && !e.metaKey;
return semicolon || altD;
};
const cancel = e => {
if (!isToggleKey(e)) return false;
e.preventDefault();
e.stopImmediatePropagation();
return true;
};
const toggleAll = () => {
const spans = Array.from(document.querySelectorAll(`.${BLUR}, [${FLAG}]`));
const anyBlurred = spans.some(s => s.classList.contains(BLUR));
const wantBlur = !anyBlurred;
spans.forEach(s => {
if (wantBlur) { s.classList.add(BLUR); s.removeAttribute(FLAG); }
else { s.classList.remove(BLUR); s.setAttribute(FLAG,'1'); }
});
};
window.addEventListener('keydown', e => {
if (cancel(e) && !e.repeat) toggleAll();
}, true);
window.addEventListener('keypress', cancel, true);
window.addEventListener('keyup', cancel, true);
})();
(() => {
const id = 'a1bncmms-fix';
if (!document.getElementById(id)) {
const s = document.createElement('style');
s.id = id;
s.textContent = `.a1bncmms{margin-bottom:0!important;}`;
document.head.appendChild(s);
}
})();