Disable Downlevel Revealed Comments while saving to HTML with JavaScript via C++

Possible Usage Scenarios

When you save your Excel file to HTML, Aspose.Cells reveals Downlevel Conditional Comments. These conditional comments are mostly relevant to older versions of Internet Explorer and are irrelevant to modern web browsers. You can read about them in detail at the following link.

Conditional comment - Downlevel-revealed conditional comment

Aspose.Cells for JavaScript via C++ allows you to eliminate these Downlevel Revealed Comments by setting the HtmlSaveOptions.disableDownlevelRevealedComments property to true.

Disable Downlevel Revealed Comments while saving to HTML

The following sample code shows the usage of HtmlSaveOptions.disableDownlevelRevealedComments property. The screenshot shows the effect of this property when it is not set to true. Please download the sample Excel file used in this code and the output HTML generated by it for reference.

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Sample Code

<!DOCTYPE html>
<html>
    <head>
        <title>Aspose.Cells Example</title>
    </head>
    <body>
        <h1>Aspose.Cells - Disable Downlevel Revealed Comments Example</h1>
        <input type="file" id="fileInput" accept=".xls,.xlsx,.csv" />
        <button id="runExample">Run Example</button>
        <a id="downloadLink" style="display: none;">Download Result</a>
        <div id="result"></div>
    </body>

    <script src="aspose.cells.js.min.js"></script>
    <script type="text/javascript">
        const { Workbook, SaveFormat, HtmlSaveOptions, Utils } = AsposeCells;
        
        AsposeCells.onReady({
            license: "/lic/aspose.cells.enc",
            fontPath: "/fonts/",
            fontList: [
                "arial.ttf",
                "NotoSansSC-Regular.ttf"
            ]
        }).then(() => {
            console.log("Aspose.Cells initialized");
        });

        document.getElementById('runExample').addEventListener('click', async () => {
            const fileInput = document.getElementById('fileInput');
            if (!fileInput.files.length) {
                document.getElementById('result').innerHTML = '<p style="color: red;">Please select an Excel file.</p>';
                return;
            }

            const file = fileInput.files[0];
            const arrayBuffer = await file.arrayBuffer();

            // Load sample workbook
            const workbook = new Workbook(new Uint8Array(arrayBuffer));

            // Disable DisableDownlevelRevealedComments
            const opts = new HtmlSaveOptions();
            opts.disableDownlevelRevealedComments = true;

            // Save the workbook in html
            const outputData = workbook.save(SaveFormat.Html, opts);
            const blob = new Blob([outputData], { type: 'text/html' });
            const downloadLink = document.getElementById('downloadLink');
            downloadLink.href = URL.createObjectURL(blob);
            downloadLink.download = 'outputDisableDownlevelRevealedComments_true.html';
            downloadLink.style.display = 'block';
            downloadLink.textContent = 'Download HTML File';

            document.getElementById('result').innerHTML = '<p style="color: green;">Workbook saved as HTML with DisableDownlevelRevealedComments = true. Click the download link to get the result.</p>';
        });
    </script>
</html>

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