What I want to do, is simply append some html on an element. I checked some links, and i find different confusing/non-working/non-recomended/etc solutions.
Using jav
You could do something like this:
htmlComponent.ts
htmlVariable: string = "Some html."; //this is html in TypeScript code that you need to display
htmlVariable: string = "Some html.";
htmlComponent.html
//this is how you display html code from TypeScript in your html