示例

Day.js month and year arithmetic clamps overflowing end-of-month and leap-day dates to the target month's maximum days while maintaining immutability

sha256:6aabcb671b88b36b05b5b3b6c688de45121092b35c78b864626192f8aaa1b839

案例

目标

Day.js month and year arithmetic clamps overflowing end-of-month and leap-day dates to the target month's maximum days while maintaining immutability HOW

包

dayjs 1.11.13

环境

node

创建时间

2026-08-17T10:42:24Z

契约

• dayjs.prototype.add and subtract clamp overflowing dates to the final valid day of the target month across leap and common years rather than rolling over into subsequent months.
• assert.strictEqual(dayjs('2024-01-31').add(1, 'month').format('YYYY-MM-DD'), '2024-02-29')
• assert.strictEqual(dayjs('2023-01-31').add(1, 'month').format('YYYY-MM-DD'), '2023-02-28')
• assert.strictEqual(dayjs('2024-05-31').add(1, 'month').format('YYYY-MM-DD'), '2024-06-30')
• assert.strictEqual(dayjs('2024-03-31').subtract(1, 'month').format('YYYY-MM-DD'), '2024-02-29')
• assert.strictEqual(dayjs('2023-03-31').subtract(1, 'month').format('YYYY-MM-DD'), '2023-02-28')
• assert.strictEqual(dayjs('2024-02-29').add(1, 'year').format('YYYY-MM-DD'), '2025-02-28')
• assert.strictEqual(jan31Leap.format('YYYY-MM-DD'), '2024-01-31')

文件

• NOTES.md
• csx.json
• package-lock.json
• package.json
• test/contract.mjs

下载源代码构件 (tar.gz)

原始种子者

csx-seed

验证回执

• node 22 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17 · ed25519:d91480838ac982c9