About javascript: void (0);

[muh-ramadhan]

how to handle it?
in codeigniter version 3 for example I use
<a href="#" data-menu="menu-main"></a>
it functions as it should not refresh the page.
But in codeigniter version 4 lines of code href = "#" refreshes the page. so I changed it to
<a href="javascript"void(0)" data-menu="menu-main"></a> to function without having to refresh the page.

But the problem is javascript: void (0); violates HTTPS Content Security Policy on CSP-enabled (Content Security Policy).

[muh-ramadhan]

CodeIgniter 4.0.2
Google Chrome Version 81.0.4044.122
Run Local Deveploment and Shared Hosting

[jlamim]

Wrong: <a href="javascript"void(0)" data-menu="menu-main"></a>

Change to: <a href="javascript:void(0);" data-menu="menu-main"></a>

[muh-ramadhan]

Wrong: <a href="javascript"void(0)" data-menu="menu-main"></a>

Change to: <a href="javascript:void(0);" data-menu="menu-main"></a>

Sorry typo,
If Use href="#"
This Error Not Toggle data-menu="example"
so must use href=javascript:void(0);
so that data-menu="example" works.
The Case Is Like This, In
app/Config/Routes.php Line 19 $routes->setDefaultController('Welcome');
If I Use a View That in the Routes Setup I Determined This Error Occurs, But It Does Not Apply to Controllers That Are Not Set on Line 19.
To reduce the use of javascript:void(0); In the Default Routes Specified. Because of Content Security Policy Reasons.