v2.4.0

New features

• A new .pipe() method on Decoder allows you to pass the output of one decoder into another:

  string
    .transform((s) => s.split(',')) // transform first...
    .pipe(array(nonEmptyString)); //   ...then validate that result

  This was previously possible already with .then, but it wasn't as elegant to express.
• The new .pipe() can also dynamically select another decoder, based on the input:

  string
    .transform((s) => s.split(',').map(Number)) // transform first...
    .pipe((tup) =>
      tup.length === 2
        ? point2d
        : tup.length === 3
          ? point3d
          : never('Invalid coordinate'),
    );

• Decoder error messages will now quote identifiers using single quotes, which makes them more human-readable in JSON responses. Compare:

  "Value at key \"foo\": Must be \"bar\", \"qux\""  // ❌ Previously
  "Value at key 'foo': Must be 'bar', 'qux'"        // ✅ Now
  

• Some runtime perf optimizations

New decoders

• identifier (docs)
• nanoid() (docs)

Removed decoders

• Remove numericBoolean decoder, which was deprecated since 2.3.0.