Export to download for kendo tab strip

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Kendo

Kendo-UI

I have kendo tab strip with Three 3 tabs.

i have button in third Tab (export to PDF ) where i need to download Tab 2 and Tab 3 grid.

What I have tried:

I tried with below code its downloading only Tab 3 Graph.

function getPDF(selector) {
    kendo.drawing.drawDOM($(selector)).then(function (group) {
        return kendo.drawing.exportPDF(group, {
            margin: { left: "1cm", top: "1cm", right: "1cm", bottom: "1cm" }
        });
    })
        .done(function (data) {
            // Save the PDF file
            kendo.saveAs({
                dataURI: data,
                fileName: "ChartReport.pdf"
            });
        });
}