magento-test/app/code/Magento/Backend/view/adminhtml/templates/dashboard/chart.phtml

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */

use Magento\Backend\ViewModel\ChartsPeriod;
use Magento\Framework\Escaper;
use Magento\Framework\View\Element\Template;
use Magento\Framework\View\Helper\SecureHtmlRenderer;

/**
 * @var Template $block
 * @var Escaper $escaper
 * @var ChartsPeriod $viewModel
 * @var SecureHtmlRenderer $secureRenderer
 */
$viewModel = $block->getViewModel();
?>
<div class="dashboard-diagram">
    <div class="dashboard-diagram-graph">
        <canvas id="chart_<?= $escaper->escapeHtmlAttr($block->getData('html_id')) ?>_period"></canvas>
        <?= /* @noEscape */ $secureRenderer->renderStyleAsTag(
            'display:none',
            '#chart_' . $escaper->escapeJs($block->getData('html_id')) . '_period'
        ) ?>
        <div class="dashboard-diagram-nodata">
            <span><?= $escaper->escapeHtml(__('No Data Found')) ?></span>
        </div>
    </div>
    <script type="text/x-magento-init">
    {
        "#chart_<?= $escaper->escapeJs($block->getData('html_id')) ?>_period": {
            "Magento_Backend/js/dashboard/chart": {
                "updateUrl": "<?= $escaper->escapeUrl($block->getUrl($block->getData('update_url'), [
                    '_current' => true
                ])) ?>",
                "periodSelect": "#dashboard_chart_period",
                "periodUnits": <?= /** @noEscape */ $viewModel->getPeriodUnits() ?>,
                <?php if ($precision = $block->getData('chart_precision')): ?>
                "precision": <?= (int)$precision ?>,
                <?php endif; ?>
                "type": "<?= $escaper->escapeJs($block->getData('html_id')) ?>"
            }
        }
    }
    </script>
</div>