Placeholder libraries
mustache.js
[simple] source: https://markojs.com/
handlebars.js
[extension_of_mustache.js] source: https://handlebarsjs.com/
custom delimiters
extension: https://github.com/jonschlinkert/handlebars-delimiters or https://github.com/kmilov/handlebars-delimiters
Marko
[generate_html] source: https://markojs.com/
nunjucks
[powerful_extensible_mozilla] [loads_html_templates] [?overkill] source: https://mozilla.github.io/nunjuck
eta
[modern] [based_on_esj] [mabye_not_adequit] source: https://eta.js.org/
ESJ
[render_html] source: https://ejs.co/
swig
[depreciated] source: https://github.com/paularmstrong/swig
dot.js
[unsecure] source: https://olado.github.io/doT/index.html