JavaScript What does javascript:Function syntax mean? what does javascript do,what does javascript mean,what does

It's called "the old way of using JavaScript in attributes," relevant only in HTML.

You can also write:

poop:Function("alert('ohai')")();

Your example is just JavaScript code, not an HTML attribute, so it's just a label.

Answer:1

When you specify a fully qualified link, the text to the left of the colon is called the scheme.

<a target='_blank' href="https://example.com/foo">foo</a>
           ^ scheme is "https"

Browsers allow you the specify a scheme of javascript in HTML markup, in which case the browser interprets the link content to the right of the colon as a script to be executed, instead of a destination resource.

<a target='_blank' href="javascript:alert('I am a script, formatted as a link!')">foo</a>
            ^ scheme is "javascript"

(Please, never do this; use addEventListener("click", function() { ... }) instead.)

If you include the javascript: prefix in non-link contexts, however, it's interpreted as a JavaScript label. This is totally unnecessary.

Answer:2

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