<input
id='xxx'
type="button"
value="click">
// カスタムイベント作成
const event = new Event('wakuwaku_bank');
// イベントリスナにカスタムイベントを追加
const elem = document.createElement('div')
elem.addEventListener(
'wakuwaku_bank',
e => alert('dispatch wakuwaku_bank'),
false
)
// dispatchEventでカスタムイベントを発火
const btn = document.getElementById('xxx')
btn.addEventListener(
'click',
e => elem.dispatchEvent(event),
false
)
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