Port ESLint config, improve strictness+consistency

searchmarkers / mark-my-search

Search keyword highlighter for Firefox and Chromium

https://markmysearch.ator.systems

European Union Public License 1.2

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Closed ator-dev closed 3 months ago

ator-dev commented 3 months ago

Switch to new ESLint "flat" config format
Change ESLint config, increase strictness
- Include stylistic rule sets
- Use "type checked" variants of recommended and stylistic rule sets
- Disable some of the additional rules
Improve consistency of code (partially informed by new lint rules)
Improve safety by using fewer type casts (as)
Use instanceof instead of checking tagName