How Does React Tell a Class from a Function?
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How Does React Tell a Class from a Function?
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Re: How Does React Tell a Class from a Function?
#2"Please don’t turn this into an interview question. In fact, this post is more about JavaScript than it is about React" I love this line.
Re: How Does React Tell a Class from a Function?
#3"Please don’t turn this into an interview question. In fact, this post is more about JavaScript than it is about React" I love this line.
“In a December, 2nd, 2018 blog post, developer Dan Abramov explained in length and in detail how React can (and/or can not) tell a Class from a Function. He wrote: ‘please don’t turn this into an interview question’ Can you define what this refers to?”
Re: How Does React Tell a Class from a Function?
#4"Please don’t turn this into an interview question. In fact, this post is more about JavaScript than it is about React" I love this line.
“In a December, 2nd, 2018 blog post, developer Dan Abramov explained in length and in detail how React can (and/or can not) tell a Class from a Function. He wrote: ‘please don’t turn this into an interview question’ Can you define what this refers to?”
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Re: How Does React Tell a Class from a Function?
#5It defines Component.prototype.isReactComponent. There isn't really a better way to do it in JS.
Re: How Does React Tell a Class from a Function?
#6I'm really quite surprised how much time is spent worrying about Babel.
I always thought that you could just write valid JavaScript and it's completely Babel's responsibility not to screw that up.
Edit: not sure what's wrong with my comment so let me clarify:
I wouldn't have thought that library developers had to think about what other tools might do with their library. I always thought that so long as your code is valid JavaScript, Babel would faithfully transpile it down to another valid target using polyfills and whatnot.
Re: How Does React Tell a Class from a Function?
#7I've read at least two dozen explanations of prototypes that didn't offer 10% of the clarity of this post. And another brilliantly told story of how React does its work. Bravo.
Re: How Does React Tell a Class from a Function?
#8"Please don’t turn this into an interview question. In fact, this post is more about JavaScript than it is about React" I love this line.
“In a December, 2nd, 2018 blog post, developer Dan Abramov explained in length and in detail how React can (and/or can not) tell a Class from a Function. He wrote: ‘please don’t turn this into an interview question’ Can you define what this refers to?”
I don't think I can answer that without knowing how this has been bound by the caller.
Re: How Does React Tell a Class from a Function?
#9"Please don’t turn this into an interview question. In fact, this post is more about JavaScript than it is about React" I love this line.
Abramov's a class act all the way.
Re: How Does React Tell a Class from a Function?
#10TL;DR -- it uses `instanceof`