We often add promising TC39 proposals into Civet so people can experiment without waiting. We've added https://github.com/tc39/proposal-pipeline-operator https

We often add promising TC39 proposals into Civet so people can experiment without waiting. We've added https://github.com/tc39/proposal-pipeline-operator https://github.com/tc39/proposal-pipeline-operator, a variant of https://github.com/tc39/proposal-pattern-matching https://github.com/tc39/proposal-pattern-matching, a variant of https://github.com/tc39/proposal-string-dedent https://github.com/tc39/proposal-string-dedent and others. Since our goal is to be 99% compatible with ES we'll need to accommodate any proposals that become standard and pick up anything TC39 leaves on the table (rest parameters in any position, etc.)