Remove TODO comments.
Remove semi colon after 'if' phrase.
Remove uneccessary codes.
Listen editor change event and enable save after editor change
Bug fix: init duplicated data.
Bug fix: save button status fix.
Bug fix:  fix bug when delete the first row.
Refactor: dom access responsibilty should be in component.
Refactor: return type consistent with jsdoc.
Refactor: method scrope and jsdoc.
Improve: avoid dao access in validator when title is empty.
Fix js error.