autosize for height
https://discuss.atom.io/t/webview-autosize/16915
<webview src="https://www.github.com/" autosize="on"
style="display: bolck; border: none; height: 80vh; width: 95vw">
</webview>
Viewport units: vw, vh, vmin, vmax. Length units representing 1% of the viewport size for viewport width (vw), height (vh), the smaller of the two (vmin), or the larger of the two (vmax).