[refactor] jsx-curly-braces-presence, jsx-one-expression-per-line, no-danger-with-children: add isWhiteSpaces to lib/util/jsx

Author: vedadeepta

lib/rules/jsx-curly-brace-presence.js

@@ -104,7 +104,7 @@ module.exports = {
     function containsWhitespaceExpression(child) {
       if (child.type === 'JSXExpressionContainer') {
         const value = child.expression.value;
-        return value ? !(/\S/.test(value)) : false;
+        return value ? jsxUtil.isWhiteSpaces(value) : false;
       }
       return false;
     }
@@ -206,7 +206,7 @@ module.exports = {
     }
 
     function isWhiteSpaceLiteral(node) {
-      return node.type && node.type === 'Literal' && node.value && !(/\S/.test(node.value));
+      return node.type && node.type === 'Literal' && node.value && jsxUtil.isWhiteSpaces(node.value);
     }
 
     function getAdjacentSiblings(node, children) {

lib/rules/jsx-one-expression-per-line.js

@@ -6,6 +6,7 @@
 'use strict';
 
 const docsUrl = require('../util/docsUrl');
+const jsxUtil = require('../util/jsx');
 
 // ------------------------------------------------------------------------------
 // Rule Definition
@@ -89,7 +90,7 @@ module.exports = {
         let countNewLinesAfterContent = 0;
 
         if (child.type === 'Literal' || child.type === 'JSXText') {
-          if (/^\s*$/.test(child.raw)) {
+          if (jsxUtil.isWhiteSpaces(child.raw)) {
             return;
           }
 

lib/rules/no-danger-with-children.js

@@ -6,6 +6,7 @@
 'use strict';
 
 const variableUtil = require('../util/variable');
+const jsxUtil = require('../util/jsx');
 const docsUrl = require('../util/docsUrl');
 
 // ------------------------------------------------------------------------------
@@ -81,7 +82,7 @@ module.exports = {
     function isLineBreak(node) {
       const isLiteral = node.type === 'Literal' || node.type === 'JSXText';
       const isMultiline = node.loc.start.line !== node.loc.end.line;
-      const isWhiteSpaces = /^\s*$/.test(node.value);
+      const isWhiteSpaces = jsxUtil.isWhiteSpaces(node.value);
 
       return isLiteral && isMultiline && isWhiteSpaces;
     }

lib/util/jsx.js

@@ -76,9 +76,19 @@ function isJSXAttributeKey(node) {
     node.name.name === 'key';
 }
 
+/**
+ * Check if value has only whitespaces
+ * @param {string} value
+ * @returns {boolean}
+ */
+function isWhiteSpaces(value) {
+  return typeof value === 'string' ? /^\s*$/.test(value) : false;
+}
+
 module.exports = {
   isDOMComponent,
   isFragment,
   isJSX,
-  isJSXAttributeKey
+  isJSXAttributeKey,
+  isWhiteSpaces
 };