This tiny (3KB, < 120 lines) jQuery plugin turns any table into an editable spreadsheet. Here are the key features:

• No magic - works on a normal HTML table (so you can plug it in into any web table)
• Supports validation and change events (so you can warn about invalid input or prevent invalid changes)
• Uses standard DOM focus for selection (so does not interrupt scrolling or tabbing outside the table)
• Native copy/paste support
• Does not force any styling (so you can style it any way you want, using normal CSS)
• Works well with Bootstrap
• Depends only on jQuery

See http://mindmup.github.com/editable-table/

• jQuery http://jquery.com/