Bug Report

Steps to reproduce

Set these lines in index.html

  window.$docsify = {
    //...
    loadSidebar: true,
    routerMode: 'history',
    coverpage: true,
    onlyCover: true,

Then use any other doman URLs in _coverpage file, See below...

<a href="proxy.php?url=https%3A%2F%2Frstudio.com%2Fauth-sign-in">Login</a><br />

What is the current behavior

when clicking on the link on the cover page there is no response, while checking the browser console getting the following error.

Uncaught DOMException: Failed to execute 'pushState' on 'History': A history state object with URL 'https://rstudio.com/auth-sign-in' cannot be created in a document with origin 'https://datatools.inhouse.com' and URL 'https://datatools.inhouse.com/'.
at https://cdn.jsdelivr.net/npm/docsify/lib/docsify.min.js:1:93866

What is the expected behavior

Redirect to the mentioned web page directly.

Other relevant information

• Bug does still occur when all/other plugins are disabled?

• Your OS:
  Using the docsify index.html file in an apache container, the apache server serves the web site.

• Docsify version:
  Using "src="proxy.php?url=https%3A%2F%2Fcdn.jsdelivr.net%2Fnpm%2Fdocsify%2Flib%2Fdocsify.min.js" " in the index page. I believe this will use the latest version of docsify.

• Have you seen this issue with other docsify projects?
  Yes, see A cross-origin url cannot be redirected to if "externalLinkTarget" is set to "_self" and "routerMode" is set to "history" #1046 @Koooooo-7 @anikethsaha

• Docsify plugins:

1. search.min.js
2. docsify-plugin-flexible-alerts
3. mermaid.js

Mentioned index.html and _coverpage files are in the below repository. Please check it.

Git repo

Mention the docsify version in which this bug was not present (if any)