Decode all html entities on HTML document

I'm consuming an API that returns encoded HTML entities on the response (I don't have access to the code).

This response contains text that will be later used on the HTML, such as inside

<p>, <h1> ... 

I would like to know the best way to decode all the HTML entities on the document.

All the solutions I found tell me to decode each API response. But it isn't scalable on my case.

Btw, I'm using React.