Add missing jsdocs

Author: golopot

lib/rules/jsx-no-useless-fragment.js

@@ -14,6 +14,7 @@ function isJSXText(node) {
 
 /**
  * @param {string} text
+ * @returns {boolean}
  */
 function isOnlyWhitespace(text) {
   return text.trim().length === 0;
@@ -97,6 +98,7 @@ module.exports = {
     /**
      * Test whether a JSXElement has less than two children, excluding paddings spaces.
      * @param {JSXElement|JSXFragment} node
+     * @returns {boolean}
      */
     function hasLessThanTwoChildren(node) {
       if (!node || !node.children || node.children.length < 2) {
@@ -158,7 +160,7 @@ module.exports = {
 
     /**
      * @param {ASTNode} node
-     * @returns {((fixer: object) => object) | undefined}
+     * @returns {Function | undefined}
      */
     function getFix(node) {
       if (!canFix(node)) {

lib/util/jsx.js

@@ -67,6 +67,7 @@ function isJSX(node) {
 /**
  * Check if node is like `key={...}` as in `<Foo key={...} />`
  * @param {ASTNode} node
+ * @returns {boolean}
  */
 function isJSXAttributeKey(node) {
   return node.type === 'JSXAttribute' &&