refInput.value.focus()； typescrit 报红解决

改为：refInput.value?.focus();

<script setup lang="ts">
import {onMounted, ref} from "vue";
// 优先定义ref对象，否则后面无法取值
const refInput = ref<HTMLElement | null>(null)

onMounted(() => {
  if (refInput.value) {
    console.log('refInput存在')
    refInput.value?.focus();
  }
})
</script>