TextArea: wrong autoHeight counting

[slunecniborecek]

Steps

1. create TextArea instance with autoHeight property
   <TextArea autoHeight />
2. put a content in there (just keep typing or copy & paste some text); while doing this do not press <enter> key

Expected Result

TextArea grows with the content

Actual Result

TextArea keeps the original size; It only grows when pressing <enter> key. Actually it only counts newLines * lineHeight (simplified) which is IMO wrong

Version

0.71.0

Testcase

https://react.semantic-ui.com/addons/text-area#text-area-example-auto-height

Contribution

I have a fix ready locally if interested

[levithomason]

Confirmed issue. PRs are very much welcome.

[slunecniborecek]

@levithomason PR is ready for review

[slunecniborecek]

@levithomason thanks for merging. Unfortunately with your last commit you broke the functionality on IE browsers.

steps 1:

1. copy a long text
2. paste using context menu

steps 2:

1. make text area to grow some height
2. select all text in it
3. using context menu, click 'delete' or 'cut'

Expected:
textarea is resized properly in both steps1 and steps2

Actual:
the height stays