Unable to install ESP Web Tools with Yarn: Can't add "esptool-js": invalid package version undefined

[mesopa]

After many months I tried again web ESP Tools, felt very hipped because I saw Typescript but ended up frustrated.

Running the following command to install the library on my existing React project:
yarn add esp-web-tools

Outputs the following error message:

error Can't add "esptool-js": invalid package version undefined. info Visit https://yarnpkg.com/en/docs/cli/add for documentation about this command.

Does anyone has any hints? Something that I'm missing.
Much appreciated.

[balloob]

Yarn complains about the esptool-js package not having a version number. It's a limitation of Yarn, NPM has no such problem.

I recommend to use the installation instructions on our website which recommends to include it from a CDN: https://esphome.github.io/esp-web-tools/#add-website

[mesopa]

That solved my problem. Much appreciated.

Since is is a model nicely Trypescripted, could be really nice to make it work with React.

[balloob]

Fixed in 9.2.0