Duplicate ID "outbound-link-title" violates HTML5

[katelynsills]

• I confirm that this is an issue rather than a question.

Bug report

Steps to reproduce

1. Create a site with several external links on one page.
2. Build the site with Vuepress 1.6.0
3. Attempt to validate the result as HTML5
4. Validation will fail due to duplicate IDs whereas with Vuepress 1.5, it did not.

For a concrete example, please see this PR which attempts to upgrade to Vuepress 1.6.0 and uses a Github Action for HTML5 Validation.

What is expected?

Vuepress should be HTML5 compliant.

What is actually happening?

Duplicate IDs per page are being produced

Other relevant information

8d10119 Seems to be the commit that introduced this problem.

• Output of npx vuepress info in my VuePress project:

Environment Info:

  System:
    OS: macOS 10.15.6
    CPU: (12) x64 Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
  Binaries:
    Node: 14.11.0 - ~/.nvm/versions/node/v14.11.0/bin/node
    Yarn: 1.22.5 - /usr/local/bin/yarn
    npm: 6.14.8 - ~/.nvm/versions/node/v14.11.0/bin/npm
  Browsers:
    Chrome: 85.0.4183.121
    Edge: Not Found
    Firefox: Not Found
    Safari: 14.0
  npmPackages:
    @vuepress/core:  1.6.0 
    @vuepress/theme-default:  1.6.0 
    vuepress: ^1.6.0 => 1.6.0 
  npmGlobalPackages:
    vuepress: Not Found

[pbek]

Thank you for bringing that up, @katelynsills. I just found out about VuePress today and the first thing I did after a yarn run build on the boilerplate webpage was uploading the html files to https://validator.w3.org/nu/#file to check the HTML5 validity. 😁

Google will not like that at all. 😀

[adico1]

I can take that.
do you think it will be a good solution to just remove the id. I didn't find its being used.

[adico1]

1. removing the id remove the first error.

but brings up another one

2. taking the same action and removing the attribute aria-labelledby="outbound-link-title" fixes the second bug
   but I'm not sure if that case is fits as solution.

Let me know if that is ok, otherwise I can use the following link which suggest a solution for such problem
sdras/vue-sample-svg-icons#2

[adico1]

i've added a PR removing both:

1. the attribute 'id' from title which is unnecessary
2. the aria-labelledby from SVG which i guess can be removed

#2648

I will add another PR later with random id solution

[adico1]

the current PR doesn't remove any attribute but rather adds a random id to the id attributes
#2649

[ktquez]

The ideal would be to add aria-hidden="true" to the svg icon and add visually hidden text with some class of type sr-only.

[adico1]

add a new PR that fix the issue by @ktquez suggestion
#2650

[ktquez]

@adico1
Awesome! Thanks for this fix

[adico1]

ty for the comment, actually I think its the best solution because its also scalable.