SOURCE

// vue 过滤器
const filters = {
    date (v) {
        var d = new Date(v);
        return d.getFullYear()
            + "-" + ((d.getMonth() + 1)).toString().padStart(2, "0")
            + "-" + (d.getDate()).toString().padStart(2, "0")
            + " " + (d.getHours()).toString().padStart(2, "0")
            + ":" + (d.getMinutes()).toString().padStart(2, "0")
            + ":" + (d.getSeconds()).toString().padStart(2, "0")
    },
    null (v) {
        if (v == null) {
            return '--'
        } else {
            return v
        }
    },
    spaceStr (value) {
        return value===null||value===''?'--':value
    }
}
// 时间戳
console.log(Date.now())
console.log(filters.date(Date.now()))
console.log(filters.null(2022))
console.log(filters.spaceStr('2022-08-22'))
console.log(filters.spaceStr('2022-08-22'))