Does this snippet make my site GDPR compliant?
No, and no banner alone can. The banner collects a choice; compliance requires that non-essential cookies and scripts do not run until that choice is 'accepted', that declining is as easy as accepting, and that you can demonstrate consent. This tool gives you the interface and the stored flag. Wiring your analytics loader to check that flag is the part that actually matters.
How do I make my analytics wait for consent?
Do not put the analytics tag in the page. Read the storage key first, and only inject the script if the value is 'accepted'. In Google Consent Mode terms, set analytics_storage and ad_storage to denied by default and update them to granted when the accept button is clicked.
How do I let someone change their mind later?
Add a link in your footer that removes the storage key and reloads the page. The banner reappears because it only hides when the key has a value. Offering a way to withdraw consent as easily as it was given is a GDPR requirement, and the snippet does not add that link for you.
Why localStorage instead of a cookie?
So the consent record itself does not create a cookie you would then have to ask consent for. The trade-off is that localStorage is per-origin and per-browser: the choice does not follow the visitor across subdomains or devices, and it never expires on its own.
Do I still need this if my site sets no cookies at all?
If you genuinely set no cookies and load no third-party scripts, you do not need a consent banner. Adding one anyway is friction with no benefit. Check first: an embedded YouTube player, a web font from a third-party CDN, or a chat widget can all bring cookies with them.
Can I change the wording without breaking anything?
Yes. The message, both button labels, the link text, and the link URL are all free text and are HTML-escaped before they reach the snippet. Point the link at your real privacy policy, not the example.com placeholder.