Fix 'dangerouslySetInnerHTML did not match' in React

Dec 7, 2019

Learn how to fix the React dangerouslySetInnerHTML did not match warning, caused by nesting a p tag inside another p tag, by switching the wrapper to a div.

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I was trying to print the HTML contained in a prop, using dangerouslySetInnerHTML, while I got this error in the browser console:

Warning: Prop `dangerouslySetInnerHTML` did not match.

This was a Next.js project, but the solution applies to any React code.

The string I was trying to print appeared for a while, and then disappeared. Quite strange!

It was even stranger when I tried to print a fixed HTML string, like this:

<p
  dangerouslySetInnerHTML={{
    __html: '<p>test</p>'
  }}></p>

The error message is cryptic but after a while, I realized I could not set a p tag inside another p tag.

Switching to:

<div
  dangerouslySetInnerHTML={{
    __html: '<p>test</p>'
  }}></div>

worked like a charm.

Tagged: React · All topics

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