[Eugene (OEvgeny)]

webchat-es5.js is described as an ES5 bundle for Internet Explorer 11, but it is ES2019, and Internet Explorer has not been supported since 4.16.0.

Changelog Entry

Changed

• Docs and samples: webchat-es5.js is no longer described as ES5 or supporting Internet Explorer 11, in PR #6043, by @OEvgeny

Description

Docs, samples and comments still said webchat-es5.js is ES5 or runs on Internet Explorer 11. They now describe it as the full bundle plus polyfills for some newer built-ins, with the same ES2019 target and browsers as webchat.js.

Design

• Docs only: the file name, URL and build stay, because existing pages, the embed page and the (ES5) bot agent depend on them.

Specific Changes

• README.md, packages/README.md: describe webchat-es5.js, drop the IE 11 guidance
• Samples c.es5-bundle, d.es5-direct-line-speech: text and page titles no longer promise IE 11
• samples/README.md, samples a, b, h, i: links say "Full bundle with polyfills"
• webchat-es5.ts, polyfill/es5.ts: comments

• I have added tests and executed them locally
• I have added .changelog/<PR#>-<slug>.md
• I have updated documentation

Review Checklist

This section is for contributors to review your work.

• Accessibility reviewed (tab order, content readability, alt text, color contrast)
• Browser and platform compatibilities reviewed
• CSS styles reviewed (minimal rules, no z-index)
• Documents reviewed (docs, samples, live demo)
• Internationalization reviewed (strings, unit formatting)
• package.json and package-lock.json reviewed
• Security reviewed (no data URIs, check for nonce leak)
• Tests reviewed (coverage, legitimacy)

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