Not specific to TS, just one of the modern JS features: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals https://developer.mo

Not specific to TS, just one of the modern JS features: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe... Scroll down to the part explaining how to use custom tags.