CODEWITHSUNDEEP
reactjsjsxternary
machineghost
machineghost

Reputation: 35797

How can I combine a React element and text inside a ternary?

Normally if you have something like:

<SomeComponent foo={bar} />

you can make it optional by using a ternary:

{bar ? <SomeComponent foo={bar} /> : null}

But what if the block you are starting with contains a component plus some text (a single space) and a variable, e.g.:

<SomeComponent foo={bar} /> {foobar}

Wrapping it in parentheses won't work:

{bar ? (<SomeComponent foo={bar} /> {foobar}) : null}

and in fact the only way I found to make it work was to wrap everything in another element:

{bar ? <span><SomeComponent foo={bar} /> {foobar}</span> : null}

Is there any other way to tell React that:

<SomeComponent foo={bar} /> {foobar}

is a discrete chunk, so that I can use it in a ternary (inside JS, not JSX, logic) ... without adding meaningless wrapper elements?

Upvotes: 7

Views: 3299

Answers (2)

silvenon
silvenon

Reputation: 2197

There used to be two suboptimal ways to achieve this:

  1. Using an array, which requires adding keys to React elements:

    {bar ? [<SomeComponent key="1" foo={bar} />, " ", foobar] : null}
  2. Creating a wrapper component, like @margaretkru suggested.

But with React 16.2.0+ you can use improved fragments:

{bar ? <React.Fragment><SomeComponent foo={bar} /> {foobar}</React.Fragment> : null}

or, even better, you can use the shorthand syntax:

{bar ? <><SomeComponent foo={bar} /> {foobar}</> : null}

Fragments won't produce an additional container element.

Upvotes: 8

margaretkru
margaretkru

Reputation: 2781

You could define a small component that would act as a wrapper but won't render any markup, but it technically is still a wrapper. I use this approach by defining Aux component:

const Aux = (props) => (props.children);

Then you can do:

{bar ? <Aux><SomeComponent foo={bar} /> {foobar}</Aux> : null}

This at least avoids unnecessary markup in the resulting html which might be crucial for styling purposes, if you are using flex-box for example.

Upvotes: 2

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