Make space and enter actually work if focused

If the delete button is the current active element (e.g. focused by tab) make hitting ‘space’ or ‘Enter’ do the actual delete.

src/components/delete-button/delete-button.jsx

 import PropTypes from 'prop-types';
 import React from 'react';
+import bindAll from 'lodash.bindall';
 import classNames from 'classnames';
 
 import styles from './delete-button.css';
 import deleteIcon from './icon--delete.svg';
 
-const DeleteButton = props => (
-    <div
-        aria-label="Delete"
-        className={classNames(
-            styles.deleteButton,
-            props.className
-        )}
-        role="button"
-        tabIndex={props.tabIndex}
-        onClick={props.onClick}
-    >
-        <div className={styles.deleteButtonVisible}>
-            <img
-                className={styles.deleteIcon}
-                draggable={false}
-                src={deleteIcon}
-            />
-        </div>
-    </div>
-
-);
+class DeleteButton extends React.Component {
+    constructor (props) {
+        super(props);
+        bindAll(this, [
+            'handleKeyPress',
+            'setRef'
+        ]);
+    }
+    componentDidMount () {
+        document.addEventListener('keydown', this.handleKeyPress);
+    }
+    componentWillUnmount () {
+        document.removeEventListener('keydown', this.handleKeyPress);
+    }
+    setRef (ref) {
+        this.ref = ref;
+    }
+    handleKeyPress (event) {
+        if (this.ref === event.currentTarget.activeElement && (event.key === 'Enter' || event.key === ' ')) {
+            this.props.onClick(event);
+            event.preventDefault();
+        }
+    }
+    render () {
+        return (
+            <div
+                aria-label="Delete"
+                className={classNames(
+                    styles.deleteButton,
+                    this.props.className
+                )}
+                ref={this.setRef}
+                role="button"
+                tabIndex={this.props.tabIndex}
+                onClick={this.props.onClick}
+            >
+                <div className={styles.deleteButtonVisible}>
+                    <img
+                        className={styles.deleteIcon}
+                        draggable={false}
+                        src={deleteIcon}
+                    />
+                </div>
+            </div>
+        );
+    }
+}
 
 DeleteButton.propTypes = {
     className: PropTypes.string,