add detect function
fix js error
add favicon!
modify javascript.
add favicon!
modify javascript.
remove disabled attribute in textarea.
Instead, place `textarea.select()` in click event.
modify button style.
modify design
add viewport tag
change outline to box-shadow
addd outline 0
refactor javascript
modify javascript
add copyright
modify text
change color
modify text and design.
add animate.css
modify ss
modify design
out stop duplication function