xsheetjs/docbits/64_cellprops.md

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#### Hyperlinks
Hyperlinks are stored in the `l` key of cell objects. The `Target` field of the
hyperlink object is the target of the link, including the URI fragment. Tooltips
are stored in the `Tooltip` field and are displayed when you move your mouse
over the text.
For example, the following snippet creates a link from cell `A3` to
<http://sheetjs.com> with the tip `"Find us @ SheetJS.com!"`:
```js
ws['A3'].l = { Target:"http://sheetjs.com", Tooltip:"Find us @ SheetJS.com!" };
```
Note that Excel does not automatically style hyperlinks -- they will generally
be displayed as normal text.
Links where the target is a cell or range or defined name in the same workbook
("Internal Links") are marked with a leading hash character:
```js
ws['A2'].l = { Target:"#E2" }; /* link to cell E2 */
```