how to json for extensions？

[xuxweei]

Describe the bug

i use @codemirror/lang-json and i refer to the document to use javascript to write but it gives me the prompt “Unrecognized extension value in extension set ([object Object])“. can tell me how to use it?
this is my code:

<Codemirror
        v-model="codemirrorContent"
        style="
          height: 450px;
          overflow: hidden;
          text-align: left;
          border: 1px solid #ccc;
	"
	:extensions="extensions" 
>
</Codemirror>
<script setup lang="ts">
import { json } from "@codemirror/lang-json";
import { oneDark } from "@codemirror/theme-one-dark";
const extensions = [json(),oneDark]
</script>

Reproduction

System Info

![image](https://github.com/surmon-china/vue-codemirror/assets/62375498/4dba25af-c29b-4b3b-896a-31366303bf35)

Used Package Manager

npm

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