You may have come across a website page where the href
value of an <a>
tag has a value of javascript:void(0). What does this mean?
A javascript:
URL prefix indicates to the browser that the JavaScript code following the prefix should be executed, instead of navigating to the URL. The void operator evaluates an expression and returns undefined
. By running void(0)
in the URL JavaScript code, nothing is evaluated or returned.
A link that does not navigate to a new page or section of a page may be used to define empty links during development, but using an href
value of ”#” is a better option due to potential XSS vulnerabilities with the use of javascript:
URL prefixes. This is further explained in the following article: Which href value should I use for empty JavaScript links, ”#” or “javascript:void(0)“?.
Get actionable, code-level insights to resolve JavaScript performance bottlenecks and errors.
Create a free Sentry account
Create a JavaScript project and note your DSN
Grab the Sentry JavaScript SDK
<script src="https://browser.sentry-cdn.com/7.112.2/bundle.min.js"></script>
Sentry.init({ dsn: 'https://<key>@sentry.io/<project>' });
Loved by over 4 million developers and more than 90,000 organizations worldwide, Sentry provides code-level observability to many of the world’s best-known companies like Disney, Peloton, Cloudflare, Eventbrite, Slack, Supercell, and Rockstar Games. Each month we process billions of exceptions from the most popular products on the internet.