no data state (#146)

src/Components/NetworkTable/NetworkTable.styles.scss

@@ -5,6 +5,30 @@
   border-top: $border;
 }
 
+.no-data {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  padding-top: $size-xxxl;
+
+  .network-icon {
+    fill: $brand-primary-light-gray;
+    height: $size-xl;
+    width: $size-xl;
+  }
+
+  .header {
+    padding: $size-xl 0 $size-s 0;
+    font-weight: 600;
+    color: $brand-primary-dark-gray;
+  }
+
+  .subtext {
+    color: $brand-primary-gray;
+  }
+}
+
+
 .network-table-header {
   display: flex;
   width: 100%;

src/Components/NetworkTable/NetworkTableBody.jsx

@@ -8,6 +8,7 @@ import { TABLE_ENTRY_HEIGHT } from '../../constants';
 import { useResizeObserver } from '../../hooks/useResizeObserver';
 import Styles from './NetworkTable.styles.scss';
 import { useTheme } from '../../state/theme/Context';
+import IconNetworkRequest from '../../icons/IconNetworkRequest';
 
 /* eslint no-underscore-dangle: 0 */
 
@@ -45,6 +46,7 @@ const NetworkTableBody = ({ height }) => {
   const { enableAutoScroll } = useTheme();
   const numberOfNewEntries = state.get('numberOfNewEntries');
   const data = state.get('data');
+  const actualData = state.get('actualData');
   const totalNetworkTime = state.get('totalNetworkTime');
   const selectedReqIndex = state.get('selectedReqIndex');
 
@@ -75,6 +77,19 @@ const NetworkTableBody = ({ height }) => {
     callbacks.onRequestSelect(payload);
   };
 
+  if (actualData.size === 0) {
+    return (
+      <div
+        ref={ref}
+        className={Styles['no-data']}
+      >
+        <IconNetworkRequest className={Styles['network-icon']} />
+        <span className={Styles.header}>Recording network activity</span>
+        <span className={Styles.subtext}>Perform a request to see the network activity</span>
+      </div>
+    );
+  }
+
   return (
     <>
       <FixedSizeList

src/icons/IconNetworkRequest.jsx

@@ -0,0 +1,26 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+
+const IconNetworkRequest = ({ className }) => (
+  <svg
+    className={className}
+    height="24"
+    viewBox="0 0 24 24"
+    width="24"
+    xmlns="http://www.w3.org/2000/svg"
+  >
+    <path d="M5.5 14.4999C5.5 14.7761 5.72386 14.9999 6 14.9999H8C8.27614 14.9999 8.5 14.7761 8.5 14.4999V6.99994H12.5697C12.7399 6.99994 12.8323 6.80096 12.7225 6.67093L7.1531 0.0736706C7.0732 -0.0209768 6.92735 -0.0209758 6.84745 0.0736716L1.27803 6.67093C1.16826 6.80096 1.26069 6.99994 1.43085 6.99994H5.5V14.4999Z" />
+    <path d="M15.5 9.49994C15.5 9.2238 15.7239 8.99994 16 8.99994H18C18.2761 8.99994 18.5 9.2238 18.5 9.49994V16.9999H22.5697C22.7399 16.9999 22.8323 17.1989 22.7225 17.329L17.1531 23.9262C17.0732 24.0209 16.9274 24.0209 16.8474 23.9262L11.278 17.329C11.1683 17.1989 11.2607 16.9999 11.4309 16.9999H15.5V9.49994Z" />
+  </svg>
+
+);
+
+IconNetworkRequest.propTypes = {
+  className: PropTypes.string,
+};
+
+IconNetworkRequest.defaultProps = {
+  className: '',
+};
+
+export default IconNetworkRequest;

src/styles/variables.scss

@@ -4,6 +4,7 @@ $brand-success: #70be44;
 $brand-warning: #f68d38;
 $brand-primary-dark-gray: #1E2127;
 $brand-primary-gray: #6D7584;
+$brand-primary-light-gray: #979EAB;
 $dark-gray: #5c7288;
 $bg-blue-50: #e6f1fd;
 $bg-gray-90: #F7F8FA;