Run results for: DOM selectors vs localStorage/sessionStorage

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:92.0) Gecko/20100101 Firefox/92.0

Browser: Firefox 92

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 3 years ago

HTML Preparation code:

<meta name="promotions" content="ONEPROMO,TWOPROMO">
<meta name="promos" id="promos" content="ONEPROMO,TWOPROMO">

Script Preparation code:

sessionStorage.setItem('promos', 'ONEPROMO,TWOPROMO')
localStorage.setItem('promos', 'ONEPROMO,TWOPROMO')

Tests:

document.getElementById
var promos = document.getElementById('promos').content
document.querySelector
var promos = document.querySelector('meta[name=promotions]').content
sessionStorage
var promos = sessionStorage.getItem('promos')
localStorage
var promos = localStorage.getItem('promos')