frappe-charts/src/js/utils/export.js

https://frappe.github.io/charts

import { $ } from '../utils/dom';
import { CSSTEXT } from '../../css/chartsCss';

export function downloadFile(filename, data) {
	var a = document.createElement('a');
	a.style = "display: none";
	var blob = new Blob(data, {type: "image/svg+xml; charset=utf-8"});
	var url = window.URL.createObjectURL(blob);
	a.href = url;
	a.download = filename;
	document.body.appendChild(a);
	a.click();
	setTimeout(function(){
		document.body.removeChild(a);
		window.URL.revokeObjectURL(url);
	}, 300);
}

export function prepareForExport(svg) {
	let clone = svg.cloneNode(true);
	clone.classList.add('chart-container');
	clone.setAttribute('xmlns', "http://www.w3.org/2000/svg");
	clone.setAttribute('xmlns:xlink', "http://www.w3.org/1999/xlink");
	let styleEl = $.create('style', {
		'innerHTML': CSSTEXT
	});
	clone.insertBefore(styleEl, clone.firstChild);

	let container = $.create('div');
	container.appendChild(clone);

	return container.innerHTML;
}