Convert SVG to PNG / save SVG as PNG

SVG_to_PNG.js

// SVG2PNG
// By Cees Timmerman, 2024-04-05.
// Paste into console and adjust indices as needed.
let im = document.getElementsByTagName('img')
let fname = location.href
if (im.length < 1) {
	let svg = document.getElementsByTagName('svg')[0]
	let bb = svg.getBBox()
	im = new Image(bb.width, bb.height)
	im.src = 'data:image/svg+xml;charset=utf-8;base64,' + btoa(document.getElementsByTagName('svg')[0].outerHTML)
} else {
	im = im[0]
	fname = im.src
}
let canvas = new OffscreenCanvas(im.width, im.height)
canvas.getContext('2d').drawImage(im, 0, 0, im.width, im.height)
canvas.convertToBlob().then(blob => {
	const url = window.URL.createObjectURL(blob)
	let w = window.open(url)
	let a = w.document.createElement("a")
	a.download = (fname.split('#')[0].split('?')[0].split('/').pop()) + ".png"
	a.href = url
	a.click()
	w.close()
	window.URL.revokeObjectURL(url)
})

TODO: Test in Firefox; https://stackoverflow.com/questions/25789086/save-svg-to-disk-as-png-image-browser-discrepancy

Page with SVG in first img tag: https://web.mit.edu/remy/
Open image in new tab to see support for SVG tag only.