how long did you need to learn vue.js ?

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One project..

I think it all depends on what you mean with "learn vue".
You can learn it at a basic level just following a tutorial, or getting better with a project.
I think that, by the way, to be able to "master" something, a bit more time is necessary than a project.

I work with Zend, and every new project I learn something new, or I do something in a different and better way than in previous projects.

It depends on your background too. If you're experienced with Javascript and other frameworks, it will be easier.

About an hour or so, but if you are talking make readable code i would say about a week / week and a half

Depends if you know how good you are with JS and read documentation

thank you for your answers 👍
but i've asked how long you had to learn it :)
not me.

it's a chance to show off 😆

@heyheni it's true.. I learned it by starting a new project using it.. with the help of google and stackoverflow ofcourse 😂😂