Google's John Mueller replied to a question around links found in JavaScript saying that once the link is rendered, Google will treat the link like how they treat any other link. John Mueller said on ...

“Use proper link markup, do not use fragment URLs for links you want crawlers to discover and follow, and you should be building websites that work well with JavaScript and the links will be found,” ...

Mozilla’s latest beta version of the Firefox browser, Firefox Nightly, makes calls between the WebAssembly binary format and JavaScript faster, so it is easier to combine the two languages.