The content within the 'Child content' span is appearing in the Light DOM, but for some reason it's not being displayed on the actual page (refer to the screenshot provided).
Does anyone have any insights as to why it might not be visible? I also noticed that it doesn't seem to be slotting properly, even though I tried to make it visible.
<!doctype html>
<html>
<body>
<hello-world>
<span>Child content</span>
</hello-world>
<script>
var template = `
<span>Hello world</span>
<slot></slot>
`;
var MyElementProto = Object.create(HTMLElement.prototype);
// Triggered when an instance of the element is created
MyElementProto.createdCallback = function() {
var shadowRoot = this.createShadowRoot();
shadowRoot.innerHTML = template;
};
document.registerElement('hello-world', { prototype: MyElementProto });
</script>
</body>
</html>
P.S. This issue was encountered in Chrome 57.0.2987.133