`findMutating` matches beyond standard array functions

[fletcherhaz]

Checklist

• I have tried restarting my IDE and the issue persists.
• I have read the FAQ and my problem is not listed.

Tell us about your environment

• ESLint version: 7.28.0
• eslint-plugin-vue version: 7.13.0
• Node version: 16.0.0
• Operating System: macOS 11.2.3

Please show your full configuration:

module.exports = {
    root: true,
    env: { browser: true },
    parser: 'vue-eslint-parser',
    parserOptions: {
        ecmaVersion: 2020,
        parser: '@typescript-eslint/parser'
    },
    rules: {
        'vue/no-mutating-props': 'error'
    }
}

What did you do?

<script>
  export default {
    props: ['prop']
    setup(props) {
      props.prop.sortAscending()
    }
  }
</script>

What did you expect to happen?
This rule should not warn because it does not match the standard array functions.

What actually happened?

error Unexpected mutation of "prop" prop vue/no-mutating-props

Repository to reproduce this issue

This issue is caused by the regex here:

/^push|pop|shift|unshift|reverse|splice|sort|copyWithin|fill$/u

Currently, the starting and ending anchors only apply to the first (push) and last (fill) strings. I don't think this is the intended behavior because it matches many other functions. See here for some examples.

Adding parentheses makes the regex perform more like I imagine was intended:

/^(push|pop|shift|unshift|reverse|splice|sort|copyWithin|fill)$/u

Here are the results.