Javascript textarea cancel redo

I’m making a small javascript editor (for a chrome extension) somewhat like the one on SO.

There’s a toolbar for manipulation of the text in the textarea. (e.g. surround the selected text with some template)

I was wondering if there is a easy way to achieve this, currently when using the system undo/redo, it messes the text up (I think the system is only keeping track of deltas between edits).

You can probably simulate textInput
events to manipulate the contents of the textarea. The changes made that way are respected by undo/redo, I think (I know they are in Safari)

var element = document.getElementById('someTextarea');
var text = 'This text will be inserted in the textarea';
var event = document.createEvent('TextEvent');

event.initTextEvent('textInput', true, true, null, text);
element.dispatchEvent(event); // fire the event on the the textarea

Basically, the text is inserted as though you pasted it yourself. So if something is selected, it’ll be be replaced with the text. If there’s no selection, the text will be inserted at the caret’s position. And undo/redo should work normally (undoing/redoing the entire inserted string in one go), because the browser acts as if you typed/pasted it yourself.

As I said, I know this works like a charm with undo/redo in Safari, so I’d assume it works in Chrome as well.

Hello, buddy!责编内容来自:Hello, buddy! (源链) | 更多关于

阅读提示:酷辣虫无法对本内容的真实性提供任何保证,请自行验证并承担相关的风险与后果!
本站遵循[CC BY-NC-SA 4.0]。如您有版权、意见投诉等问题,请通过eMail联系我们处理。
酷辣虫 » 前端开发 » Javascript textarea cancel redo

喜欢 (0)or分享给?

专业 x 专注 x 聚合 x 分享 CC BY-NC-SA 4.0

使用声明 | 英豪名录