diff --git a/website/src/components/Playground/EditValue.js b/website/src/components/Playground/EditValue.js
index a49c72b3..8fd427c0 100644
--- a/website/src/components/Playground/EditValue.js
+++ b/website/src/components/Playground/EditValue.js
@@ -36,6 +36,7 @@ export default (props: Props<*>) => {
         {...props}
         onChange={e => props.onChange(props.property, e.target.value)}
         placeholder="undefined"
+        onFocus={e => e.target.select()}
         value={Number.isNaN(props.value) ? '' : props.value}
       />
     );