Fix the key prop so we don't risk displaying duplicates.

README.md

@@ -179,6 +179,17 @@ const decorators = {
 <Treebeard data={...} decorators={decorators}/>
 ```
 
+#### makeKeyProp
+Optional prop to generate your own [React key props](https://reactjs.org/docs/lists-and-keys.html). Function that takes the node as the only param. Example:
+```jsx
+<Treebeard
+    data={data}
+    onToggle={this.onToggle}
+    onSelect={this.onSelect}
+    makeKeyProp={(node) => node.yourUniqueId}
+/>
+```
+
 ### Data Attributes
 
 ```javascript

__tests__/Container.test.js

@@ -29,13 +29,7 @@ describe('<Container/>', () => {
     describe('when terminal is true', () => {
         it('should contains a decorators.Header into their children', () => {
             const wrapper = renderComponent({terminal: true});
-            expect(
-                wrapper
-                    .children()
-                    .contains(
-                        <decorators.Header node={data} style={style.tree.node.header}/>
-                    )
-            ).toBe(true);
+            expect(wrapper.find('Header').dive().text()).toBe('react-treebeard');
         });
     });
     describe('when terminal is false', () => {

__tests__/Treebeard.test.js

@@ -17,4 +17,9 @@ describe('<Treebeard/>', () => {
         const wrapper = renderComponent();
         expect(wrapper).toMatchSnapshot();
     });
+    it('should handle custom makeKeyProp', () => {
+        const wrapper = renderComponent({ makeKeyProp: (node) => node.sha });
+        const firstNodeKey = wrapper.find('TreeNode').first().key();
+        expect(firstNodeKey).toBe('9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08');
+    });
 });

__tests__/__snapshots__/Treebeard.test.js.snap

@@ -46,76 +46,95 @@ exports[`<Treebeard/> should match default snapshot 1`] = `
       }
     }
     key="1"
+    makeKeyProp={[Function]}
     node={
       Object {
         "children": Array [
           Object {
             "children": Array [
               Object {
                 "name": "app.js",
+                "sha": "828270ffd0e8ee6f32eb2a83bc3da31f3a9ac73f4833de481f65337c0802a9aa",
               },
               Object {
                 "name": "data.js",
+                "sha": "3ae815b93875786c05cba19df444662a789640e83ab65f4b84e9c16474cb1ed0",
               },
               Object {
                 "name": "index.html",
+                "sha": "f82ec4ae606600a57396ca47e21e0f013bded8523dfaffee040eefa4ea815962",
               },
               Object {
                 "name": "styles.js",
+                "sha": "3ba988e33afe3c6e453fc86bf26813ad90e5fe2dd7f55527a8c1408f861bfeac",
               },
               Object {
                 "name": "webpack.config.js",
+                "sha": "017cbc93d594c0f410b0c4c86c6b160a421674ddf72ab10201a16646f02fcb9c",
               },
             ],
             "name": "example",
+            "sha": "f05bcd2dffa3e047ce58c0f1a1877dcbe4d868cf0eac58bc2f7f9ab805289b0b",
           },
           Object {
             "children": Array [],
             "loading": true,
             "name": "node_modules",
+            "sha": "bd9d2e8d246bc323081327ef12d3d40e0fc09cc7d36ea05bc286ea74e47c3515",
           },
           Object {
             "children": Array [
               Object {
                 "children": Array [
                   Object {
                     "name": "decorators.js",
+                    "sha": "cc37c52929a8f16cfbf7b1881119f963e5a332507fac7d7f4fa9a271ad58534e",
                   },
                   Object {
                     "name": "treebeard.js",
+                    "sha": "177c1b4a2b85d1c2a15ed481dbcefd9a43a901d6efa05c41dbb7e1859d5547e2",
                   },
                 ],
                 "name": "components",
               },
               Object {
                 "name": "index.js",
+                "sha": "cc02786ca507e473781c0c08a2738e921eaa49c061515598d0ef1dff3054ea7b",
               },
             ],
             "name": "src",
+            "sha": "da5bd1bf868d4b2a68ce84c5e13545523ddc58232fe59e74a3d8ccb9be9e6db6",
           },
           Object {
             "children": Array [
               Object {
                 "name": "animations.js",
+                "sha": "1fde2cd5a18a6bd17660167f0fe5296a2ea1275da38961632b5630abf9c7a85d",
               },
               Object {
                 "name": "default.js",
+                "sha": "a59dc347bb2eb8f5a51f3b7f65dd63580829bcdfee89d5331f9ff063438b6dbd",
               },
             ],
             "name": "themes",
+            "sha": "8c382185c33911dbc2e2a76094b73a02644635ed9de1e9995a8b06f96bdbae32",
           },
           Object {
             "name": "gulpfile.js",
+            "sha": "f68fe2b19685fb03204cfb3a0c7e58c7698fa9abc595185e39028fbc6e0531e1",
           },
           Object {
             "name": "index.js",
+            "sha": "08f982599837827c163a787c6ae0a5cf1b493829493c1f29d707a5026b28ed0e",
           },
           Object {
             "name": "package.json",
+            "sha": "c31e4a244c319e43a03cd3fbfabd0c6d976567c5b79e8b06a218b2aae3637839",
           },
         ],
         "id": 1,
         "name": "react-treebeard",
+        "sha": "9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08",
         "toggled": true,
       }
     }

__tests__/mocks/data.js

@@ -2,44 +2,55 @@ export default {
     name: 'react-treebeard',
     id: 1,
     toggled: true,
+    sha: '9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08',
     children: [
         {
             name: 'example',
+            sha: 'f05bcd2dffa3e047ce58c0f1a1877dcbe4d868cf0eac58bc2f7f9ab805289b0b',
             children: [
-                { name: 'app.js' },
-                { name: 'data.js' },
-                { name: 'index.html' },
-                { name: 'styles.js' },
-                { name: 'webpack.config.js' }
+                { name: 'app.js', sha: '828270ffd0e8ee6f32eb2a83bc3da31f3a9ac73f4833de481f65337c0802a9aa' },
+                { name: 'data.js', sha: '3ae815b93875786c05cba19df444662a789640e83ab65f4b84e9c16474cb1ed0' },
+                { name: 'index.html', sha: 'f82ec4ae606600a57396ca47e21e0f013bded8523dfaffee040eefa4ea815962' },
+                { name: 'styles.js', sha: '3ba988e33afe3c6e453fc86bf26813ad90e5fe2dd7f55527a8c1408f861bfeac' },
+                { name: 'webpack.config.js', sha: '017cbc93d594c0f410b0c4c86c6b160a421674ddf72ab10201a16646f02fcb9c' }
             ]
         },
         {
             name: 'node_modules',
             loading: true,
+            sha: 'bd9d2e8d246bc323081327ef12d3d40e0fc09cc7d36ea05bc286ea74e47c3515',
             children: []
         },
         {
             name: 'src',
+            sha: 'da5bd1bf868d4b2a68ce84c5e13545523ddc58232fe59e74a3d8ccb9be9e6db6',
             children: [
                 {
                     name: 'components',
                     children: [
-                        { name: 'decorators.js' },
-                        { name: 'treebeard.js' }
+                        {
+                            name: 'decorators.js',
+                            sha: 'cc37c52929a8f16cfbf7b1881119f963e5a332507fac7d7f4fa9a271ad58534e'
+                        },
+                        {
+                            name: 'treebeard.js',
+                            sha: '177c1b4a2b85d1c2a15ed481dbcefd9a43a901d6efa05c41dbb7e1859d5547e2'
+                        }
                     ]
                 },
-                { name: 'index.js' }
+                { name: 'index.js', sha: 'cc02786ca507e473781c0c08a2738e921eaa49c061515598d0ef1dff3054ea7b' }
             ]
         },
         {
             name: 'themes',
+            sha: '8c382185c33911dbc2e2a76094b73a02644635ed9de1e9995a8b06f96bdbae32',
             children: [
-                { name: 'animations.js' },
-                { name: 'default.js' }
+                { name: 'animations.js', sha: '1fde2cd5a18a6bd17660167f0fe5296a2ea1275da38961632b5630abf9c7a85d' },
+                { name: 'default.js', sha: 'a59dc347bb2eb8f5a51f3b7f65dd63580829bcdfee89d5331f9ff063438b6dbd' }
             ]
         },
-        { name: 'gulpfile.js' },
-        { name: 'index.js' },
-        { name: 'package.json' }
+        { name: 'gulpfile.js', sha: 'f68fe2b19685fb03204cfb3a0c7e58c7698fa9abc595185e39028fbc6e0531e1' },
+        { name: 'index.js', sha: '08f982599837827c163a787c6ae0a5cf1b493829493c1f29d707a5026b28ed0e' },
+        { name: 'package.json', sha: 'c31e4a244c319e43a03cd3fbfabd0c6d976567c5b79e8b06a218b2aae3637839' }
     ]
 };

__tests__/utils.test.js

@@ -0,0 +1,10 @@
+import {makeKeyProp} from '../src/util';
+
+describe('makeKeyProp', () => {
+    it('should return id first', () => {
+        expect(makeKeyProp({id: 'uniqueId'})).toBe('uniqueId');
+    });
+    it('should return random string if no id is present', () => {
+        expect(typeof makeKeyProp({})).toBe('string');
+    });
+});

package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-treebeard",
-  "version": "3.2.4",
+  "version": "3.2.5",
   "description": "React Tree View Component",
   "main": "index.js",
   "scripts": {

src/components/TreeNode/index.js

@@ -4,7 +4,7 @@ import styled from '@emotion/styled';
 import {isArray, isFunction} from 'lodash';
 
 import defaultAnimations from '../../themes/animations';
-import {randomString} from '../../util';
+import {makeKeyProp} from '../../util';
 import {Ul} from '../common';
 import NodeHeader from '../NodeHeader';
 import Drawer from './Drawer';
@@ -45,7 +45,7 @@ class TreeNode extends PureComponent {
 
     renderChildren(decorators) {
         const {
-            animations, decorators: propDecorators, node, style, onToggle, onSelect, customStyles
+            animations, decorators: propDecorators, node, style, onToggle, onSelect, customStyles, makeKeyProp
         } = this.props;
 
         if (node.loading) {
@@ -69,7 +69,7 @@ class TreeNode extends PureComponent {
                         style={style}
                         customStyles={customStyles}
                         decorators={propDecorators}
-                        key={child.id || randomString()}
+                        key={makeKeyProp(child)}
                         node={child}
                     />
                 ))}
@@ -113,11 +113,13 @@ TreeNode.propTypes = {
     animations: PropTypes.oneOfType([
         PropTypes.object,
         PropTypes.bool
-    ]).isRequired
+    ]).isRequired,
+    makeKeyProp: PropTypes.func
 };
 
 TreeNode.defaultProps = {
-    customStyles: {}
+    customStyles: {},
+    makeKeyProp
 };
 
 export default TreeNode;

src/components/index.js

@@ -4,13 +4,13 @@ import {castArray} from 'lodash';
 
 import defaultTheme from '../themes/default';
 import defaultAnimations from '../themes/animations';
-import {randomString} from '../util';
+import {makeKeyProp} from '../util';
 import {Ul} from './common';
 import defaultDecorators from './Decorators';
 import TreeNode from './TreeNode';
 
 const TreeBeard = ({
-    animations, decorators, data, onToggle, style, onSelect, customStyles
+    animations, decorators, data, onToggle, style, onSelect, customStyles, makeKeyProp
 }) => (
     <Ul style={{...defaultTheme.tree.base, ...style.tree.base}}>
         {castArray(data).map(node => (
@@ -21,7 +21,8 @@ const TreeBeard = ({
                 animations={animations}
                 onSelect={onSelect}
                 customStyles={customStyles}
-                key={node.id || randomString()}
+                makeKeyProp={makeKeyProp}
+                key={makeKeyProp(node)}
                 style={{...defaultTheme.tree.node, ...style.tree.node}}
             />
         ))}
@@ -41,14 +42,16 @@ TreeBeard.propTypes = {
     ]),
     onToggle: PropTypes.func,
     onSelect: PropTypes.func,
-    decorators: PropTypes.object
+    decorators: PropTypes.object,
+    makeKeyProp: PropTypes.func
 };
 
 TreeBeard.defaultProps = {
     style: defaultTheme,
     animations: defaultAnimations,
     decorators: defaultDecorators,
-    customStyles: {}
+    customStyles: {},
+    makeKeyProp
 };
 
 export default TreeBeard;

src/util/index.js

@@ -1,3 +1,7 @@
+import makeKeyProp from './makeKeyProp';
 import randomString from './randomString';
 
-export {randomString};
+export {
+    makeKeyProp,
+    randomString
+};

src/util/makeKeyProp.js

@@ -0,0 +1,5 @@
+import randomString from './randomString';
+
+const makeKeyProp = (node) => node.id || randomString();
+
+export default makeKeyProp;