Spreadsheet Viewport

The viewport delimits the area of the visible cells in the JavaScript grid. When the viewport is enabled, JSS will render only the necessary visible cells. That means viewport is the most important configuration when dealing with a large amount of data. tableOverflow: true will enable the viewport along the properties tableWidth and tableHeight to define the viewport width and height respectively. It is also possible to use fullscreen: true to make sure all available screen area is used for cell rendering. Those properties are defined at the worksheet level. That means the developer can choose different viewport sizes for each worksheet.

Documentation

Methods

The following methods interact with the worksheets viewport programmatically.

Method	Description
setViewport	`instance.setViewport(w: Number, h: number) => void`
fullscreen	`instance.fullscreen(state: Boolean) => void`
goto	`instance.goto(x: Number, y: Number) => void`

Example

Change the spreadsheet viewport dimensions

The following example changes the visible viewport area dynamically.

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

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

<br/>
<input type="text" value="800px" style="width:60px" />
<input type="text" value="400px" style="width:60px" />
<input type="button" value="Set viewport" id="setviewport"/>
<input type="button" value="Set fullscreen" id="setfullscren"/>

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

// Create the spreadsheet
let setViewport = function(o) {
    // First worksheet
    grid[0].setViewport(o.previousElementSibling.previousElementSibling.value, o.previousElementSibling.value);
}

let data = [];

// Create the data
for (let j = 0; j < 500; j++) {
     data[j] = [];
     for (let i = 0; i < 20; i++) {
         data[j][i] = jspreadsheet.helpers.getColumnNameFromCoords(i, j);
     }
}

let grid = jspreadsheet(document.getElementById('spreadsheet'), {
    toolbar: true,
    worksheets: [{
        data: data,
        tableOverflow: true,
        tableWidth: '600px',
    }]
});

document.getElementById("setviewport").onclick = (e) => setViewport(e.target)
document.getElementById("setfullscren").onclick = () => grid[0].fullscreen(true)
</script>
</html>

Goto

Move the viewport to a specified row or cell.

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

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

<br/>
<input type="button" value="Go to row number 500" id="goto500" />

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

// Create the spreadsheet
let grid = jspreadsheet(document.getElementById('spreadsheet'), {
    worksheets: [{
        minDimensions: [6, 5000],
        tableOverflow: true,
        tableWidth: '600px',
    }]
});

document.getElementById("goto500").onclick = () => grid[0].goto(499);
</script>
</html>

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