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reagent 2024-09-17
is there a functional difference between parent1 and parent2 in this example? as in, is there a functional difference between calling a function which returns hiccup using () vs using []?
(defn my-component []
[:div "hello"])
(defn parent []
[:div [my-component] "world"])
(defn parent []
[:div (my-component) "world"])obviously () is wrong and possibly illegal in most countries, but does it change the behavior at all in any cases?
schadocalex 2024-09-17T14:58:12.689949Z
it's not wrong, both syntaxes can be used. () will be fully transparent for reagent (can't know if a function was called and doesn't care), [] will create a component with all its features (props, rerender, etc.)
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p-himik 2024-09-17T15:01:05.603259Z
This question is so popular that it even got its own doc instead of being just another entry in the FAQ: https://github.com/reagent-project/reagent/blob/master/doc/UsingSquareBracketsInsteadOfParens.md
👍 1
👉 1
🙏 1
thank you both! remembered reading this years back and it didn't turn up in my very brief googling
sorry about that!
schadocalex 2024-09-17T15:05:59.734539Z
I think a good real-world use of () (not really given in the doc) is small helper functions:
(defn label [name]
[:label name])(label "Firstname")