Reduce bundle size of parser-html.js

[sosukesuzuki]

Description

Before:

$ node ./scripts/build/build.mjs --file=parser-html.js --print-size
 Building packages 
parser-html.js..................................................179 kB    DONE  

After:

$ node ./scripts/build/build.mjs --file=parser-html.js --print-size
 Building packages 
parser-html.js..................................................156 kB    DONE  

Checklist

• I’ve added tests to confirm my change works.
• (If changing the API or CLI) I’ve documented the changes I’ve made (in the docs/ directory).
• (If the change is user-facing) I’ve added my changes to changelog_unreleased/*/XXXX.md file following changelog_unreleased/TEMPLATE.md.
• I’ve read the contributing guidelines.

✨Try the playground for this PR✨

[fisker]

Can you try use html-elements-attributes.evaluate.js as filename to see if the bundle became smaller?

[sosukesuzuki]

I tried it in my local but bundle size didn't became smaller.

 Building packages 
parser-html.js..................................................156 kB    DONE  

[fisker]

Thanks, it's not safe anyway, mapObject use Object.create(null), but turns to JSON will be an normal object

HTML_ELEMENT_ATTRIBUTES.prototype will be truly.

[fisker]

Same here.