AMQ Clear Answer

Add a feature to clear text in the answer column with Delete key.
当前为 2023-03-08 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name            AMQ Clear Answer
// @namespace       https://github.com/SlashNephy
// @version         1.1.0
// @author          SlashNephy
// @description     Add a feature to clear text in the answer column with Delete key.
// @description:ja  Delete キーを押下することで解答欄のテキストをクリアする機能を追加します。
// @homepage
// @homepageURL
// @icon            https://animemusicquiz.com/favicon-32x32.png
// @supportURL      https://github.com/SlashNephy/.github/issues
// @match           https://animemusicquiz.com/*
// @require         https://cdn.jsdelivr.net/gh/TheJoseph98/AMQ-Scripts@b97377730c4e8553d2dcdda7fba00f6e83d5a18a/common/amqScriptInfo.js
// @grant           unsafeWindow
// @license         MIT license
// ==/UserScript==

const awaitFor = async (predicate, timeout) =>
  new Promise((resolve, reject) => {
    let timer
    const interval = window.setInterval(() => {
      if (predicate()) {
        clearInterval(interval)
        clearTimeout(timer)
        resolve()
      }
    }, 500)
    if (timeout !== undefined) {
      timer = setTimeout(() => {
        clearInterval(interval)
        clearTimeout(timer)
        reject(new Error('timeout'))
      }, timeout)
    }
  })

const onReady = (callback) => {
  if (document.getElementById('startPage')) {
    return
  }
  awaitFor(() => document.getElementById('loadingScreen')?.classList.contains('hidden') === true)
    .then(callback)
    .catch(console.error)
}

const handleKeydown = (event) => {
  const target = event.target
  if (target === null) {
    return
  }
  if (event.key === 'Delete') {
    target.value = ''
  }
}
onReady(() => {
  for (const input of document.querySelectorAll('input.flatTextInput')) {
    input.addEventListener('keydown', handleKeydown)
  }
  AMQ_addScriptData({
    name: 'Clear Answer',
    author: 'SlashNephy &lt;[email protected]&gt;',
    description: 'Add a feature to clear text in the answer column with delete key.',
  })
})
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