/li><li>Return ?&nbsp;<emu-xref aoid="EvaluateSliceNotation" id="_ref_17"><a href="#sec-evaluate-slice-notation">EvaluateSliceNotation</a></emu-xref>(<var>baseValue</var>, <var>startExpression</var>, <var>endExpression</var>).</li></ol></emu-alg>

      <emu-grammar><emu-production name="OptionalChain" collapsed="">
    <emu-nt><a href="#prod-OptionalChain">OptionalChain</a></emu-nt><emu-geq>:</emu-geq><emu-rhs a="31c47d6c"><emu-nt id="_ref_47"><a href="#prod-OptionalChain">OptionalChain</a></emu-nt><emu-t>