pure expression root nodes cannot be compiled

[leookun]

<template>
   {{ 1+1 }}
</template>

<script setup>
import { ref } from 'vue'

const name = ref('fervid')
</script>

[leookun]

https://play.vuejs.org/#eNp9kL1OwzAUhV/lyktAVEFVt6ogAeoAAyBg9BIlN8HFf/JPiRT53bl21NKh6pac8/nosyf2YG29j8jWbBNQWdkEvOcaAKYJljdLSInrze1JRb++dcIG8BiipUQoa1yACRz2kKB3RkFFm1WGW6N9AN0ohLsMXFU9ur3oquu8Oy/RBluw4IntxVDvvNHkM2UNzlqjrJDo3mwQtMXZGkqTu0ZK8/tSsuAiLg55+43tz5l858eccfbu0JMGcnbsQuMGDHO9/XzFkb6PpTJdlERfKD/QGxmz44w9Rt2R9glXbJ/LYwk9fPntGFD7w6WyaCZT4TmjB3y6cPV/3VW9Kue4Tiz9AXzCmYs=

[phoenix-ru]

Thanks for your report. It happens because everything except ElementNode's is optimized away in the root. I'll fix this behaviour

[phoenix-ru]

Should be fixed now. Playground now produces as expected:

import { ref } from 'vue';
import { toDisplayString as _toDisplayString } from "vue";
export default {
    setup () {
        const name = ref('fervid');
        return (_ctx, _cache)=>_toDisplayString(1 + 1);
    }
};