What does && in javascript mean when used on html elements?
When updating Google Tag Manager to support CSP and nonce, they say to use this script: (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start': new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0], j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src= 'https://www.googletagmanager.com/gtm.js?id='+i+dl;var n=d.querySelector('[nonce]'); n&&j.setAttribute('nonce',n.nonce||n.getAttribute('nonce'));f.parentNode.insertBefore(j,f); })(window,document,'script','dataLayer','GTM-XXXXXX'); The n&&j.setAttribute() is confusing to me; not sure if it's just a lack of Javascript…