Allow extra attrs provided to <Select> to be passed through to the …

…DOM element (#2959)

* Allow extra attrs provided to `<Select>` to be passed through to the DOM element

* Allow direct passing attrs to the Select wrapper

* Format

js/src/common/components/Select.js

@@ -1,6 +1,7 @@
 import Component from '../Component';
 import icon from '../helpers/icon';
 import withAttr from '../utils/withAttr';
+import classList from '../utils/classList';
 
 /**
  * The `Select` component displays a <select> input, surrounded with some extra
@@ -10,18 +11,33 @@ import withAttr from '../utils/withAttr';
  * - `onchange` A callback to run when the selected value is changed.
  * - `value` The value of the selected option.
  * - `disabled` Disabled state for the input.
+ * - `wrapperAttrs` A map of attrs to be passed to the DOM element wrapping the `<select>`
+ *
+ * Other attributes are passed directly to the `<select>` element rendered to the DOM.
  */
 export default class Select extends Component {
   view() {
-    const { options, onchange, value, disabled } = this.attrs;
+    const {
+      options,
+      onchange,
+      value,
+      disabled,
+
+      // Destructure the `wrapperAttrs` object to extract the `className` for passing to `classList()`
+      // `= {}` prevents errors when `wrapperAttrs` is undefined
+      wrapperAttrs: { className: wrapperClassName, ...wrapperAttrs } = {},
+
+      ...domAttrs
+    } = this.attrs;
 
     return (
-      <span className="Select">
+      <span className={classList('Select', wrapperClassName)} {...wrapperAttrs}>
         <select
           className="Select-input FormControl"
           onchange={onchange ? withAttr('value', onchange.bind(this)) : undefined}
           value={value}
           disabled={disabled}
+          {...domAttrs}
         >
           {Object.keys(options).map((key) => (
             <option value={key}>{options[key]}</option>