eslint-plugin-react/docs/rules/jsx-child-element-spacing.md

Enforce or disallow spaces inside of curly braces in JSX attributes and expressions. (react/jsx-child-element-spacing)

Rule Details

Since React removes extraneous new lines between elements when possible, it is possible to end up with inline elements that are not rendered with spaces between them and adjacent text. This is often indicative of an error, so this rule attempts to detect

The following patterns are considered warnings:

<div>
  Here is a
  <a>link</a>
</div>

<div>
  <b>This text</b>
  is bold
</div>

The following patterns are not considered warnings:

<div>
  Spacing is
  {' '}
  <a>explicit</a>
</div>

<div>
  Lack of spacing is{/*
  */}<a>explicit</a>
</div>

When Not To Use It

You can turn this rule off if you are not concerned with inline elements appearing adjacent to text, or if you always explicitly include {' '} between elements to denote spacing.