我应该将反应组件渲染为组件数组吗

Question

I have a simple react component that directly renders several children:

return (
<header>
   <img src={logo}/>
   <h1>My Site</h1>
   <nav>...</nav>
</header>
);

Are there drawbacks/benefits of rendering this component as an array of components:

return (
<header>
   {[
     <img key="1" src={logo}/>,
     <h1  key="2">My Site</h1>,
     <nav key="3">...</nav>
   ]}
</header>
);

Answer 1

Why would you render as an array? I see no benefit. The drawback is that it's confusing to read, best to keep it as close to HTML syntax as possible until you need to introduce JS.

Answer 2

I don't suggest using an array like that since it impacts readability negatively, and from what I know it does not have any benefits.

I only see this being used when someone is generating components programmatically, like when you're using Array.prototype.map() for example on an array of objects to create a new array of components with props populated from the array of objects.

Answer 3

You shouldn't use an array for this. if you can create smaller components for whatever inside it can be more beneficial for the redability

Answer 4

If you're thinking in terms of performance, there will probably be some slight drawbacks if you take into consideration the code used to generate the list of elements.

But I don't think that would be too much of a concern, what really bothers me, in this case, is the readability since you can write the same code without the brackets and curly braces to make that part a list of components, it's just harder to read and it could confuse someone else working in the same codebase.

As an alternative I can think of atm, you can extract that JSX into a component if you need to have it hidden from your render function.