external links don't work in history router mode

[pagyew]

Bug Report

Steps to reproduce

1. Set routerMode to history.
2. Create mailto link with <my@mail.com>, or any external link.
3. Click on rendered link.

What is current behaviour

Crashes with error:

SecurityError
Failed to execute 'replaceState' on 'History': A history state object with URL 'mailto:my@email.com' cannot be created in a document with origin 'https://kc32ry.csb.app' and URL 'https://kc32ry.csb.app/'.

What is the expected behaviour

Native behaviour

Other relevant information

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

• Your OS: macOS Catalina, version 10.15.7

• Node.js version: 16.13.2

• npm/yarn version: npm v8.1.2

• Browser version: Google Chrome 100.0.4896.127

• Docsify version: 4.12.2

• Docsify plugins: -

Please create a reproducible sandbox

Live example: https://docs.lume.io/

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

[trusktr]

Indeed, non-docsify links (external links) are currently not working in history router mode. We need to fix this and add tests.

live example: https://docs.lume.io/

[trusktr]

I found the issue. It happens when externalLinkTarget: '_self' is specified. Fix WIP