Automatically build a HTML with collapsible rows with JavaScript, given a JSON file.

I have a JSON that looks something like this (still to be finished, can be adapted throughout the project, can use fake data): ``` var rows = [ {'date': ('2016-01-01'), 'account': 'Revenues', 'code': 3000000, 'value': 4700.0, 'level': 1}, {'date': ('2016-01-01'), 'account': 'Revenues', 'code': 3010000, 'value': 4700.0, 'level': 2}, {'date': ('2016-01-01'), 'account': 'Revenues', 'code': 3010000, 'value': 4700.0, 'level': 3}, {'date': ('2016-01-01'), 'account': 'Revenues', 'code': 3010100, 'value': 4700.0, 'level': 4}, {'date': ('2016-01-01'), 'account': 'Benefits', 'code': 3010102, 'value': 300.0, 'level': 4}, {'date': ('2016-01-01'), 'account': 'Expenses', 'code': 3010102, 'value': 0, 'level': 1}, {'date': ('2016-01-01'), 'account': 'Expenses', 'code': 3010102, 'value': 0, 'level': 2}, {'date': ('2016-01-01'), 'account': 'Expenses', 'code': 3010102, 'value': 0, 'level': 3}, {'date': ('2016-01-01'), 'account': 'Rent', 'code': 4020101, 'value': -2150.0, 'level': 4}, {'date': ('2016-01-01'), 'account': 'Car', 'code': 4020108, 'value': -400.0, 'level':4}, {'date': ('2016-01-01'), 'account': 'Food1', 'code': 4020201, 'value': -1191.58, 'level': 4}, {'date': ('2016-01-01'), 'account': 'Food2', 'code': 4020202, 'value': -264.88, 'level': 4}, ``` I need to make a HTML table using JavaScript. This table has the following features: 1. Collapsible: when I click Level 1, it collapses all of it's direct children (and the children of the children as well). The for Level 2 and Level 3. 2. Columns: the first two columns are fixed (account and code), the value is given for a specific month, and the columns are the monthly data. 3. Style: Level 1 rows are bold and have a different style from level 2, 3 and 4, for example. 4. Fixed TOTAL column: the last column is the sum of all previous columns values, and it is fixed. 5. Loading Time: it has to be fast. 6. Totals Rows: Revenus minus Costs will equal (GROSS PROFIT) which is a calculated row. GROOS PROFIT minus EXPENSES will equal EBIT. I can even make the calculation on the backend, but the table must consider this. I probably could restructure the JSON on the backend if needed, so we can discuss which data structure would be best to work with. Even though I would prefer vanilla JavaScript, there's nothing too bad about jQuery. Thanks.