Add ability to pass custom aria-label to loader

Author: Megan Cole

docs/lib/examples/BlockUi.js

@@ -20,7 +20,7 @@ export default class Example extends React.Component {
   render() {
     return (
       <div>
-        <BlockUi tag="div" blocking={this.state.blocking}>
+        <BlockUi tag="div" blocking={this.state.blocking} ariaLabel="loading results">
           <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
           <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
         </BlockUi>

src/BlockUi.js

@@ -150,6 +150,7 @@ class BlockUi extends Component {
 
     const classes = blocking ? `block-ui ${className}` : className;
     const renderChilds = !blocking || renderChildren;
+    const { ariaLabel = 'loading' } = attributes;
 
     return (
       <Tag {...attributes} className={classes} aria-busy={blocking}>
@@ -170,7 +171,7 @@ class BlockUi extends Component {
           >
             <div className="block-ui-message">
               {message}
-              {React.isValidElement(Loader) ? Loader : <Loader />}
+              {React.isValidElement(Loader) ? Loader : <Loader ariaLabel={ariaLabel} />}
             </div>
           </div>
         </div>

src/Loader.js

@@ -1,13 +1,17 @@
 import React from 'react';
-
-function Loader() {
+import PropTypes from 'prop-types';
+function Loader({ ariaLabel }) {
   return (
-    <div className="loading-indicator">
-      <span className="loading-bullet">&bull;</span>{' '}
-      <span className="loading-bullet">&bull;</span>{' '}
-      <span className="loading-bullet">&bull;</span>
+    <div className="loading-indicator" aria-label={ariaLabel}>
+      <span aria-hidden="true" className="loading-bullet">&bull;</span>{' '}
+      <span aria-hidden="true" className="loading-bullet">&bull;</span>{' '}
+      <span aria-hidden="true" className="loading-bullet">&bull;</span>
     </div>
   );
 }
 
+Loader.propTypes = {
+  ariaLabel: PropTypes.string
+}
+
 export default Loader;