减法

返回减去指定时间量的克隆 Day.js 对象。

¥Returns a cloned Day.js object with a specified amount of time subtracted.

dayjs().subtract(7, 'year')

单位不区分大小写，并支持复数和缩写形式。

¥Units are case insensitive, and support plural and short forms.

所有可用单位的列表

¥List of all available units

当小数值传递几天和几周时，它们会在减去之前四舍五入到最接近的整数。

¥When decimal values are passed for days and weeks, they are rounded to the nearest integer before subtracting.