# Advanced Features
## luckysheet.create(options)
- **Parameter**：
- {Object} [options]:All configuration information of the table
- **Usage**：
Initialize a luckysheet, which can contain multiple worksheets, refer to [Configuration List ](https://mengshukeji.github.io/LuckysheetDocs/guide/config.html )
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## luckysheet.getcellvalue([r] [,c] [,data] [,type])
- **Parameter**：
- {Number} [r]:The row number of the cell; optional value; an integer starting from 0, 0 means the first row
- {Number} [c]:The column number of the cell; optional value; an integer starting from 0, 0 means the first column
- {Array} [data]:Table data, two-dimensional array; optional value; default value is the current table data
- {String} [type]:Cell attribute value; optional value; the default value is'v', which means to get the actual value of the cell
- **Usage**：
This method is to get the value of the cell.
1. `luckysheet.getcellvalue()` ：Return all data in the current worksheet;
2. `luckysheet.getcellvalue(0)` ：Return the first row data of the current worksheet;
3. `luckysheet.getcellvalue(null,0)` ：Return the data in the first column of the current worksheet;
4. `luckysheet.getcellvalue(0,0)` ：Return the v value of the data in the first row and first column of the current worksheet;
5. `luckysheet.getcellvalue(1,1,null,'m')` : Returns the original value of the cell in the second row and second column of the specified data.
Special case: the cell format is `yyyy-MM-dd` , when the type is'v', the display value of'm' will be mandatory
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## luckysheet.getluckysheetfile()
- **Usage**：
Returns a one-dimensional array of all table data structures[luckysheetfile](https://mengshukeji.github.io/LuckysheetDocs/guide/data.html), `luckysheet.getluckysheetfile()[0]` can get all the information of the first worksheet.
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## luckysheet.getconfig()
- **Usage**：
Quickly return to the current sheet config configuration, the config information of each worksheet is still contained in the luckysheetfile.
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## luckysheet.getluckysheet_select_save()
- **Usage**：
Returns an array of current selection objects, there may be multiple selections.
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## luckysheet.getdatabyselection([range] [,sheetIndex])
- **Parameter**：
- {Object} [range]：Selection object, `object: {row: [r1, r2], column: [c1, c2] }` ; optional value; the default is the current first selection.
- {Number} [sheetIndex]：Table subscript, an integer starting from 0, 0 means the first table; optional value; the default is the current table subscript.
- **Usage**：
Returns the data of the first selection in a table.
- `luckysheet.getdatabyselection()` : Returns the data of the current selection of the current worksheet
- `luckysheet.getdatabyselection(null,1)` : Returns the data of the current selection of the second worksheet
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## luckysheet.luckysheetrefreshgrid(scrollWidth, scrollHeight)
- **Parameter**：
- {Number} [scrollWidth]：Horizontal scroll value. The default is the current horizontal scroll position.
- {Number} [scrollHeight]：Vertical scroll value. The default is the current vertical scroll position.
- **Usage**：
Refresh the canvas display data according to scrollWidth and scrollHeight.
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## luckysheet.setcellvalue(r, c, d, v)
- **Parameter**：
- {Number} [r]：The row number of the cell; an integer starting from 0, 0 means the first row.
- {Number} [c]：The column number of the cell; an integer starting from 0, 0 means the first column.
- {Array} [d]：Table data; optional value; two-dimensional array.
- {Object | String | Number} [v]：The value to be set; it can be an object, and the object is to conform to the cell object format.
- **Usage**：
Set the value of a cell. Can be used with `luckysheet.luckysheetrefreshgrid()` to refresh and view cell value changes.
```js
luckysheet.setcellvalue(0, 0, luckysheet.flowdata(), 'abc');
luckysheet.jfrefreshgrid();
```
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## luckysheet.jfrefreshgrid()
- **Usage**：
Refresh canvas
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## luckysheet.setluckysheet_select_save(v)
- **Parameter**：
- {Array} [v]：The selection value (array) to be set. Comply with selection format rules, such as `[{ row: [r1, r2], column: [c1, c2] }]` .
- **Usage**：
Set the value of the current table selection area. With `luckysheet.selectHightlightShow()` , you can view the selection changes in the interface.
```js
luckysheet.setluckysheet_select_save([{ row: [0, 1], column: [0, 1] }]);
luckysheet.selectHightlightShow();
```
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## luckysheet.selectHightlightShow()
- **Usage**：
Highlight the current selection
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## luckysheet.setSheetHide(index)
- **Parameter**：
- {Number} [index]：Table index; an integer starting from 0, 0 means the first table; the default is the current table index.
- **Usage**：
Hide a table.
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## luckysheet.setSheetShow(index)
- **Parameter**：
- {Number} [index]：Table index; an integer starting from 0, 0 means the first table; the default is the current table index.
- **Usage**：
Display a table.
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## luckysheet.flowdata()
- **Usage**：
Quickly get the data of the current table
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## luckysheet.buildGridData(file)
- **Parameter**：
- {Object} [file]：[luckysheetfile](https://mengshukeji.github.io/LuckysheetDocs/zh/guide/data.html#%E8%8E%B7%E5%8F%96%E8%A1%A8%E6%A0%BC%E6%95%B0%E6%8D%AE)
- **Usage**：
Generate a two-dimensional array that the table can recognize
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## luckysheet.getGridData(data)
- **Parameter**：
- {Array} [data]：Two-dimensional array data of worksheet
- **Usage**：
Convert two-dimensional array data into `{r, c, v}` format one-dimensional array
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## luckysheet.destroy()
- **Usage**：
Delete and release table
