y4d

You with y4d:
1) can type decorated texts.
# *bold*
# /italic/
# _under line_
# -through line-
# `small code`
2) can use the notation like GitHub to type a highlighted source code.
```js
var hello = "world";
```
(to see the highlighted source code, requires that viewers use y4d)
3) can convert automatically to multibyte-spaces from spaces and tab-characters on TextArea.
So viewers can see the indented source code even if not use y4d.