You couldn't do this strictly with a piece of JavaScript. There will need to be some sort of persistent copy or even a micro versioning system on the server side. The JavaScript component would simply make AJAX calls (based on whatever criteria... probably not every keyup or that would be highly inefficient) periodically, which would simultaneously fetch other people's changes.
A websocket implementation could be even better, but websockets are still a relatively unknown and unsupported commodity.
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严格来说，您无法仅使用一段 JavaScript 来完成此操作。服务器端需要某种持久副本，甚至是微型版本控制系统。 JavaScript 组件只会定期进行 AJAX 调用（基于任何标准……可能不是每次按键，否则效率非常低），这会同时获取其他人的更改。
Websocket 实现可能会更好，但 Websocket 仍然是一种相对未知且不受支持的商品。
You couldn't do this strictly with a piece of JavaScript. There will need to be some sort of persistent copy or even a micro versioning system on the server side. The JavaScript component would simply make AJAX calls (based on whatever criteria... probably not every keyup or that would be highly inefficient) periodically, which would simultaneously fetch other people's changes.
A websocket implementation could be even better, but websockets are still a relatively unknown and unsupported commodity.