Wan - 3 months ago 74

HTML Question

I am looking for a way to make html table acting like excel using Javascript (Jquery preferred). Here are my problem. I made a table like this:

`<table>`

<tr>

<td id="A1">10</td>

<td id="B1">10.5</td>

</tr>

<tr>

<td id="A2">5</td>

<td id="B2" formula="A1+B1+A2"></td>

</tr>

</table>

Every td has an id, some of those tds are added a formula attribute. And I wanna to calculate those formula， give the value of formula to the td.

In the table above, here, I wanna assign the

Look like this:

`<td id="B2" formula="A1+B1+A2">25.5</td>`

Can anybody give me a clue? Thanks.

PS: Here are some resource that I found, but they do not solve my problem

Thanks a lot @palindrom. I finally solved my problem based on your answer.

Here is my code:

`$("td[formula]").each(function(){`

//1 get formula attribute

var formula = $(this).attr('formula');

//2 use regex to make expression, with the surpport of "A122"， "AB1" and more

var expression = formula.replace(/([A-Z]+[0-9]+)/g, "parseFloat(\$('#$1').html())") ;

//3 eval the expression

var result = eval( expression );

//4 set the value

$(this).html(result);

});

Answer

Should work for simple math, didnt try:

```
$("td[formula]").each( function() {
this.html( eval( this.attr("formula").replace(/[a-z][0-9]/g, "\$('#$0').html()") ) );
} );
```

**Edit:**
If you have functions like sum in the formulas, implement them as javascript functions and they should work too.