问题
Given that we don't know the div's width beforehand?
My idea: Calculate the div 's width with JS, find a way to convert it to cols and the apply the css to the textarea onthe fly. But perhaps there 's no need to reinvent the wheel?
Thank you.
回答1:
<textarea style="width:100%">* will work in most cases.
If it doesn't, please provide more information!
* Note: for some reason, it will need the cols and rows attributes to validate. But setting a width or a height will override them, so put any value you want.
来源：https://stackoverflow.com/questions/3378064/how-to-make-textarea-fill-the-width-of-its-parent-width