IE11 support for almost useful library.

ie11-support-for-almost-useful-library.md

Highlight.js

After version 10, highlight.js no longer support IE11. See this doc.

Use debug mode to find out features which don't be supported: hljs.debugMode().
Use polyfill core-js to fix IE11.

// v10.4.0
import 'core-js/features/symbol';
import 'core-js/es/array/find-index';
import 'core-js/features/dom-collections/for-each';

marked

Library developers decide to no longer support IE11 and start using some es6 features. See this issue.

Use polyfill core-js to fix IE11.

// v1.2.5
import 'core-js/es/string/starts-with';
import 'core-js/es/string/ends-with';