dayjs在vue2代码中 任意地方执行 格式转换都返回false 代码如下

const time1 = '05:00' // 符合 'HH:mm' 格式
const parsedTime = dayjs(time1, 'HH:mm')
console.log(parsedTime.isValid()) // true

放在官网执行返回true
放在vue2 mounted里边执行 返回false

Start by reproducing the issue with the shown dayjs('05:00', 'HH:mm') call inside a Vue 2 mounted hook and compare it with the standalone example. Check the reported Vue 2 and dayjs versions, including whether the required parsing setup is present. Done means the cause is isolated and a regression test or clear reproduction is available.

Written by the indexing model from the issue text.