Replace DayJS

lib/support/engineUtils.js

@@ -6,9 +6,8 @@ import {
   readFile as _readFile
 } from 'node:fs';
 import { pathToFileURL } from 'node:url';
-import dayjs from 'dayjs';
 import intel from 'intel';
-import { toArray } from '../support/util.js';
+import { toArray, localTime } from '../support/util.js';
 const log = intel.getLogger('browsertime');
 const writeFile = promisify(_writeFile);
 const readFile = promisify(_readFile);
@@ -104,5 +103,5 @@ export async function loadScript(script, options, throwError) {
   return script;
 }
 export function timestamp() {
-  return dayjs().format();
+  return localTime();
 }

lib/support/har/index.js

@@ -3,8 +3,8 @@ import merge from 'lodash.merge';
 import pick from 'lodash.pick';
 import isEmpty from 'lodash.isempty';
 import get from 'lodash.get';
-import dayjs from 'dayjs';
 import { pathToFolder } from '../pathToFolder.js';
+import { localTime } from '../util.js';
 import intel from 'intel';
 const log = intel.getLogger('browsertime');
 const require = createRequire(import.meta.url);
@@ -288,7 +288,7 @@ export function getEmptyHAR(url, browser) {
       },
       pages: [
         {
-          startedDateTime: dayjs().format(),
+          startedDateTime: localTime(),
           id: 'failing_page',
           title: url,
           pageTimings: {},

lib/support/storageManager.js

@@ -13,7 +13,8 @@ import {
 } from 'node:fs';
 import isEmpty from 'lodash.isempty';
 import intel from 'intel';
-import dayjs from 'dayjs';
+import { localTime } from './util.js';
+
 const gunzip = promisify(_gunzip);
 const writeFile = promisify(_writeFile);
 const readFile = promisify(_readFile);
@@ -23,7 +24,7 @@ const mkdir = promisify(_mkdir);
 const log = intel.getLogger('browsertime');
 
 const defaultDir = 'browsertime-results';
-let timestamp = dayjs().format().replaceAll(':', '');
+let timestamp = localTime().replaceAll(':', '');
 
 function pathNameFromUrl(url) {
   const parsedUrl = parse(url),

lib/support/util.js

@@ -265,3 +265,24 @@ export function adjustVisualProgressTimestamps(
   }
   return visualProgress;
 }
+
+export function localTime() {
+  const date = new Date();
+
+  const year = date.getFullYear();
+  const month = String(date.getMonth() + 1).padStart(2, '0');
+  const day = String(date.getDate()).padStart(2, '0');
+  const hours = String(date.getHours()).padStart(2, '0');
+  const minutes = String(date.getMinutes()).padStart(2, '0');
+  const seconds = String(date.getSeconds()).padStart(2, '0');
+
+  const offset = -date.getTimezoneOffset();
+  const sign = offset >= 0 ? '+' : '-';
+  const offsetHours = String(Math.floor(Math.abs(offset) / 60)).padStart(
+    2,
+    '0'
+  );
+  const offsetMinutes = String(Math.abs(offset) % 60).padStart(2, '0');
+
+  return `${year}-${month}-${day}T${hours}:${minutes}:${seconds}${sign}${offsetHours}:${offsetMinutes}`;
+}

package.json

@@ -15,7 +15,6 @@
     "@sitespeed.io/tracium": "0.3.3",
     "chrome-har": "1.0.1",
     "chrome-remote-interface": "0.33.2",
-    "dayjs": "1.11.13",
     "execa": "9.5.2",
     "fast-stats": "0.0.7",
     "ff-test-bidi-har-export": "0.0.17",