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只读克星：前端眼里，没有「read only」文档这回事
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| // 粘贴到 chrome devtool console 中执行 | |
| // 使用场景 | |
| // 1. 想复制只读文档的内容 | |
| // 2. 担心复制内容的行为被公司监听了 | |
| function removeAllEvents(event) { | |
| function removeEvent(el, type) { | |
| const listeners = (getEventListeners(el)[type] || []); | |
| el[`on${type}`.toLowerCase()] = null; | |
| listeners.forEach(({ type, listener, ...opts }) => { | |
| el.removeEventListener(type, listener); | |
| el.removeEventListener(type, listener, true); | |
| el.removeEventListener(type, listener, opts); | |
| }); | |
| } | |
| const events = event.split(/\s+/); | |
| const remove = (el) => events.forEach(e => removeEvent(el, e)); | |
| remove(window); | |
| remove(document); | |
| document.querySelectorAll('*').forEach(remove); | |
| document.querySelectorAll('iframe').forEach(el => { | |
| try { | |
| remove(el.contentWindow); | |
| remove(el.contentDocument); | |
| el.contentDocument.querySelectorAll('*').forEach(remove); | |
| } catch (e) {} | |
| }); | |
| } | |
| removeAllEvents('copy keyup keydown keypress select selectstart selectend selectionchange') |
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