vue ref创建对象添加属性后 属性不是响应式

const cols = reactive({});//列头数组 //初始化 onMounted(() => { //动态生成列 for (let j = 25; j <= 300; j += 25) { const columnName = c${j}; cols[columnName] = ''; dynamicColumns.value.push({ field: c${j}, title: j.toString() }); } **** 改为reactive即可****