Web Components are unrelated to the ECMAscript specification. They are part of the DOM and are not specified by TC39, but by W3C.[1] [1] https://www.w3.org/sta

Web Components are unrelated to the ECMAscript specification. They are part of the DOM and are not specified by TC39, but by W3C.[1] [1] https://www.w3.org/standards/techs/components#w3c_all https://www.w3.org/standards/techs/components#w3c_all