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Custom formulas

Create custom spreadsheet-like formulas in JavaScript and explore the power of this feature. The return from the method can be a string or a DOM element.

Special properties

When the spreadsheet invokes any method, the cell coordinates and the worksheet instance are available, and can be used for conditional operations, as shown below:

This feature is only available in Formula Premium

<html>
<script src="https://jspreadsheet.com/v8/jspreadsheet.js"></script>
<script src="https://jsuites.net/v5/jsuites.js"></script>
<link rel="stylesheet" href="https://jspreadsheet.com/v8/jspreadsheet.css" type="text/css" />
<link rel="stylesheet" href="https://jsuites.net/v5/jsuites.css" type="text/css" />

<div id="spreadsheet"></div>

<script>
// Set the JSS spreadsheet license
jspreadsheet.setLicense('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');

// Create a custom javascript method (capital case)
let SUMCOL = function() {
    let total = 0;
    // Sum all values in the column up to where the formula was called.
    for (let j = 0; j < this.y; j++) {
        total += parseInt(this.instance.options.data[j][this.x]);
    }
    return total;
}

// Send custom formula to the correct scope
formula.setFormula({ SUMCOL })

// Create the spreadsheet
jspreadsheet(document.getElementById('spreadsheet'), {
    worksheets: [{
        data: [
            [ 'Apple', 931 ],
            [ 'Google', 431 ],
            [ 'Amazon', 534 ],
            [ 'Total', '=SUMCOL()' ],
        ],
        minDimensions: [8,4],
    }]
});
</script>
</html>

DOM Elements

The cells accept a DOM element returned from a formula, as below:

<html>
<script src="https://jspreadsheet.com/v8/jspreadsheet.js"></script>
<script src="https://jsuites.net/v5/jsuites.js"></script>
<link rel="stylesheet" href="https://jspreadsheet.com/v8/jspreadsheet.css" type="text/css" />
<link rel="stylesheet" href="https://jsuites.net/v5/jsuites.css" type="text/css" />

<div id="spreadsheet"></div>

<script>
// Set the JSS spreadsheet license
jspreadsheet.setLicense('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');

// Create a custom javascript method (capital case)
let COLORIZE = function(v) {
    let d = document.createElement('span');
    d.style.color = v;
    d.innerText = v.toUpperCase();
    return d;
}

// Send custom formula to the correct scope
formula.setFormula({ COLORIZE })

// Create spreadsheet
jspreadsheet(document.getElementById('spreadsheet'), {
    worksheets: [{
        data: [
            [ 'red', '=COLORIZE(A1)' ],
            [ 'green', '=COLORIZE(A2)' ],
            [ 'blue', '=COLORIZE(A3)' ],
        ],
        columns: [
            { type: 'text', width:'300' },
            { type: 'text', width:'200' },
        ]
    }]
});
</script>
</html>