From 496faa55007778206225cd2b8f5b694180a30f80 Mon Sep 17 00:00:00 2001
From: Frederick Widjaja <widjaja.frederick@gmail.com>
Date: Tue, 15 Jun 2021 12:15:56 +0700
Subject: [PATCH] Fix null error in no-single-element-style-arrays

I'm using the ESLint plugin in VSCode, and when I'm in the middle of typing out my component style (e.g. `<View style>`) in VSCode, I'm getting the following error:
```
TypeError: Cannot read property 'expression' of null
Occurred while linting D:\Dropbox\Projects\Tokuu\Code\packages\app\src\components\products\AddImageButton.tsx:72
    at JSXAttribute (D:\Dropbox\Projects\Tokuu\Code\node_modules\eslint-plugin-react-native\lib\rules\no-single-element-style-arrays.js:40:25)
    at D:\Dropbox\Projects\Tokuu\Code\node_modules\eslint\lib\linter\safe-emitter.js:45:58
    at Array.forEach (<anonymous>)
    at Object.emit (D:\Dropbox\Projects\Tokuu\Code\node_modules\eslint\lib\linter\safe-emitter.js:45:38)
    at NodeEventGenerator.applySelector (D:\Dropbox\Projects\Tokuu\Code\node_modules\eslint\lib\linter\node-event-generator.js:293:26)
    at NodeEventGenerator.applySelectors (D:\Dropbox\Projects\Tokuu\Code\node_modules\eslint\lib\linter\node-event-generator.js:322:22)
    at NodeEventGenerator.enterNode (D:\Dropbox\Projects\Tokuu\Code\node_modules\eslint\lib\linter\node-event-generator.js:336:14)
    at CodePathAnalyzer.enterNode (D:\Dropbox\Projects\Tokuu\Code\node_modules\eslint\lib\linter\code-path-analysis\code-path-analyzer.js:711:23)
    at D:\Dropbox\Projects\Tokuu\Code\node_modules\eslint\lib\linter\linter.js:954:32
    at Array.forEach (<anonymous>)
```

Although a style attribute with no value is technically not valid, `no-single-element-style-arrays` should silently ignore this and not throw an error.
---
 lib/rules/no-single-element-style-arrays.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/rules/no-single-element-style-arrays.js b/lib/rules/no-single-element-style-arrays.js
index ce43bc9..b1fa87e 100644
--- a/lib/rules/no-single-element-style-arrays.js
+++ b/lib/rules/no-single-element-style-arrays.js
@@ -37,6 +37,7 @@ module.exports = {
     return {
       JSXAttribute(node) {
         if (node.name.name !== 'style') return;
+        if (!node.value) return;
         if (!node.value.expression) return;
         if (node.value.expression.type !== 'ArrayExpression') return;
         if (node.value.expression.elements.length === 1) {