How to solve the `TypeError: Attempted to assign to readonly property` error
I was doing something in my Next.js codebase when I ran into this problem:
TypeError: Attempted to assign to readonly property
I had a column in my database where I stored data as JSON.
In my code I was updating this JSON object, using the dot syntax (like
data.name = 'Flavio') but I forgot to call JSON.parse() before doing so.
data was not an object, but a string!
JSON.parse() before updating the JSON object.
THE WEB DEVELOPER's MANUAL
You might be interested in those things I do:
Learn to code in THE VALLEY OF CODE, your your web development manual
Find a ton of Web Development projects to learn modern tech stacks
in practice in THE VALLEY OF CODE PRO
I wrote 16 books for beginner software developers,
DOWNLOAD THEM NOW
Every year I organize a hands-on cohort course coding BOOTCAMP
to teach you how to build a complex, modern Web Application in
practice (next edition February-March-April-May 2024)
Learn how to start a solopreneur business on the Internet with SOLO LAB (next edition in 2024)
- Find me on X