In ExtJs, how to insert a fixed string at caret position in a TextArea?

问题

This question probably is asked in other framework, not sure if there is one on ExtJs, which I am new to. I wonder whether there is a simple example with a TextArea and a button. When the button is pressed, a fixed string "???" is inserted at the cursor in the TextArea.

Thanks in advance.

回答1:

You can actually do this straight from the DOM, using textareas selectionStart attribute to find the caret position.

So you could do something along the lines of

textArea.value = textArea.value.substring(0, selectionStart)+'???'+textArea.value.substring(selectionStart);

Here is a jsfiddle demonstrating this using a combination of Ext.get and Ext.getDom to select and modify the elements.

来源：https://stackoverflow.com/questions/13774153/in-extjs-how-to-insert-a-fixed-string-at-caret-position-in-a-textarea