I tried to create a new HTML element, called test: <test>some text</test>
I tried to prototyping it like this: HTMLUnknownElement.prototype.style.backgroundColor = "red"; but it doesn’t work.
Could you please help me, how to manage it?
Thanks in advance,
There isn’t really a reason to do that.
When you want to create an element with red background, you should use an existing element and assign a CSS class to it which has red background (like
<span class="test">) .