Disallow spaces inside of curly braces in JSX expressions in children…

… (react/jsx-curly-spacing)

Fixes: standard/standard#1373

CHANGELOG.md

@@ -27,6 +27,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 - Require linebreaks in curly braces in JSX attributes and expressions to be consistent ([react/jsx-curly-newline](https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-curly-newline.md)) [#1372](https://github.com/standard/standard/issues/1372) [1%]
 - Require JSX attributes and logical expressions to be indented correctly ([react/jsx-indent](https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-indent.md)) [#1370](https://github.com/standard/standard/issues/1370) [1%]
 - Require JSX event handler names to follow conventions ([react/jsx-handler-names](https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-handler-names.md)) [#1371](https://github.com/standard/standard/issues/1371) [1%]
+- Disallow spaces inside of curly braces in JSX expressions in children ([react/jsx-curly-spacing](https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-curly-spacing.md)) [#1373](https://github.com/standard/standard/issues/1373) [1%]
 - Require JSX closing bracket to be aligned with the opening tag ([react/jsx-closing-bracket-location](https://eslint.org/docs/rules/react/jsx-closing-bracket-location)) [#1361](https://github.com/standard/standard/issues/1361) [1%]
 - Disallow unnecessary curly braces in JSX props and children ([react/jsx-curly-brace-presence](https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-curly-brace-presence.md)) [#1366](https://github.com/standard/standard/issues/1366) [1%]
 - Disallow missing `key` prop in JSX elements that likely require a `key` prop ([react/jsx-key](https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-key.md)) [#1369](https://github.com/standard/standard/issues/1369) [1%]

eslintrc.json

@@ -37,6 +37,11 @@
 
     "react/jsx-closing-bracket-location": ["error", "tag-aligned"],
     "react/jsx-closing-tag-location": "error",
+    "react/jsx-curly-spacing": ["error", {
+      "attributes": { "when": "never" },
+      "children": { "when": "never" },
+      "allowMultiline": true
+    }],
     "react/jsx-curly-newline": ["error", { "multiline": "consistent", "singleline": "consistent" }],
     "react/jsx-first-prop-new-line": ["error", "multiline-multiprop"],
     "react/jsx-handler-names": "error",