[BUG] parser crashes when encountering unquoted attribute value containing at least one or more `=`

[Galimede]

Describe the bug

The parser crashes when encountering unquoted attribute value containing at least one or more =.

> html-eslint-minimal-repro@1.0.0 lint
> eslint


Oops! Something went wrong! :(

ESLint: 9.28.0

TypeError: Cannot read properties of undefined (reading 'value')
Occurred while linting /home/mathieu/dev/experiment/html-eslint-minimal-repro/index.js:5
Rule: "@html-eslint/attrs-newline"
    at Object.fix (/home/mathieu/dev/experiment/html-eslint-minimal-repro/node_modules/@html-eslint/eslint-plugin/lib/rules/attrs-newline.js:80:39)
    at normalizeFixes (/home/mathieu/dev/experiment/html-eslint-minimal-repro/node_modules/eslint/lib/linter/report-translator.js:205:25)
    at /home/mathieu/dev/experiment/html-eslint-minimal-repro/node_modules/eslint/lib/linter/report-translator.js:407:7
    at FileContext.report (/home/mathieu/dev/experiment/html-eslint-minimal-repro/node_modules/eslint/lib/linter/linter.js:1249:21)
    at Tag (/home/mathieu/dev/experiment/html-eslint-minimal-repro/node_modules/@html-eslint/eslint-plugin/lib/rules/attrs-newline.js:104:28)
    at ruleErrorHandler (/home/mathieu/dev/experiment/html-eslint-minimal-repro/node_modules/eslint/lib/linter/linter.js:1307:33)
    at /home/mathieu/dev/experiment/html-eslint-minimal-repro/node_modules/eslint/lib/linter/safe-emitter.js:45:46
    at Array.forEach (<anonymous>)
    at Object.emit (/home/mathieu/dev/experiment/html-eslint-minimal-repro/node_modules/eslint/lib/linter/safe-emitter.js:45:26)
    at #applySelector (/home/mathieu/dev/experiment/html-eslint-minimal-repro/node_modules/eslint/lib/linter/source-code-traverser.js:148:17)

To Reproduce

Link to minimal repro: https://github.com/Galimede/html-eslint-minimal-repro

Expected behavior

It shouldn't be mandatory to add quotes around an attribute value (in a template literal).

[yeonjuan]

Hi. @Galimede
The flat/recommend contains settings for HTML files. (**/*.html)
It contains languageOptions for html file so it was recognizing your JS code as HTML that was causing the problem.

When parsing JS or TS that uses html in template literal, you need to apply the settings as follows.
I think this should be added to our documentation. :) Thanks!

import html from "@html-eslint/eslint-plugin";

export default [
  {
    plugins: {
      "@html-eslint" :html,
    },
    rules: html.configs["flat/recommended"].rules,
    // or manually
   //  rules: { "@html-eslint/attrs-newline": "error" },
    files: ["**/*.js"],
  },
];

[Galimede]

Hi,
Oh I didn't know about that, indeed it works fine now, thanks for the quick answer! 😄