[Dart] Online Input Method - Pali (Pāli, Pāḷi)

Inspired by palipad (demo of palipad), I write a Dart webapp which help users input Pāli language online. The implementation is simple. Create an input:text element first, and then listen to the onKeyup event of the input:text element. The last two characters of the input:text element will be replaced according to the following rule.

Type	For
AA	Ā
aa	ā
II	Ī
ii	ī
UU	Ū
uu	ū
"N	Ṅ
"n	ṅ
.M	Ṃ
.m	ṃ
~N	Ñ
~n	ñ
.T	Ṭ
.t	ṭ
.D	Ḍ
.d	ḍ
.N	Ṇ
.n	ṇ
.L	Ḷ
.l	ḷ

Demo (Fork me on Github)

Source Code for Demo (HTML):

Source Code for Demo (Dart):

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References:

[1]	events - Respond immediately to textarea changes in Dart - Stack Overflow

[2]	dart:core.String API Docs

[3]	dart - Use static variable in function() - Stack Overflow

[4]	javascript - Get cursor position (in characters) within a text Input field - Stack Overflow

[5]	dart - TextArea cursor position - Stack Overflow

[6]	dart - caret position in an editable div (dartlang) - Stack Overflow

[7]	selection - Setting and getting selectionrange/caret position in contenteditable div element (dart) - Stack Overflow

[8]	Pāli Input Method on Ubuntu Linux

[9]	[Golang] Online Input Method (Pāli) by GopherJS