added web vendorsHEADmaster

5 files changed, 324 insertions, 0 deletions

diff --git a/date-fns/src/addMonths/benchmark.js b/date-fns/src/addMonths/benchmark.js
new file mode 100644
index 0000000..13f5203
--- /dev/null
+++ b/date-fns/src/addMonths/benchmark.js
@@ -0,0 +1,21 @@
+// @flow
+/* eslint-env mocha */
+/* global suite, benchmark */
+
+import addMonths from '.'
+import moment from 'moment'
+
+suite('addMonths', function () {
+  benchmark('date-fns', function () {
+    return addMonths(this.date, 4)
+  })
+
+  benchmark('Moment.js', function () {
+    return this.moment.add(4, 'months')
+  })
+}, {
+  setup: function () {
+    this.date = new Date()
+    this.moment = moment()
+  }
+})
diff --git a/date-fns/src/addMonths/index.d.ts b/date-fns/src/addMonths/index.d.ts
new file mode 100644
index 0000000..1308e13
--- /dev/null
+++ b/date-fns/src/addMonths/index.d.ts
@@ -0,0 +1,4 @@
+// This file is generated automatically by `scripts/build/typings.js`. Please, don't change it.
+
+import { addMonths } from 'date-fns'
+export default addMonths
diff --git a/date-fns/src/addMonths/index.js.flow b/date-fns/src/addMonths/index.js.flow
new file mode 100644
index 0000000..f568f0d
--- /dev/null
+++ b/date-fns/src/addMonths/index.js.flow
@@ -0,0 +1,52 @@
+// @flow
+// This file is generated automatically by `scripts/build/typings.js`. Please, don't change it.
+
+export type Interval = {
+  start: Date | number,
+  end: Date | number,
+}
+
+export type Locale = {
+  code?: string,
+  formatDistance?: (...args: Array<any>) => any,
+  formatRelative?: (...args: Array<any>) => any,
+  localize?: {
+    ordinalNumber: (...args: Array<any>) => any,
+    era: (...args: Array<any>) => any,
+    quarter: (...args: Array<any>) => any,
+    month: (...args: Array<any>) => any,
+    day: (...args: Array<any>) => any,
+    dayPeriod: (...args: Array<any>) => any,
+  },
+  formatLong?: {
+    date: (...args: Array<any>) => any,
+    time: (...args: Array<any>) => any,
+    dateTime: (...args: Array<any>) => any,
+  },
+  match?: {
+    ordinalNumber: (...args: Array<any>) => any,
+    era: (...args: Array<any>) => any,
+    quarter: (...args: Array<any>) => any,
+    month: (...args: Array<any>) => any,
+    day: (...args: Array<any>) => any,
+    dayPeriod: (...args: Array<any>) => any,
+  },
+  options?: {
+    weekStartsOn?: 0 | 1 | 2 | 3 | 4 | 5 | 6,
+    firstWeekContainsDate?: 1 | 2 | 3 | 4 | 5 | 6 | 7,
+  },
+}
+
+export type Duration = {
+  years?: number,
+  months?: number,
+  weeks?: number,
+  days?: number,
+  hours?: number,
+  minutes?: number,
+  seconds?: number,
+}
+
+export type Day = 0 | 1 | 2 | 3 | 4 | 5 | 6
+
+declare module.exports: (date: Date | number, amount: number) => Date
diff --git a/date-fns/src/addMonths/index.ts b/date-fns/src/addMonths/index.ts
new file mode 100644
index 0000000..7b34369
--- /dev/null
+++ b/date-fns/src/addMonths/index.ts
@@ -0,0 +1,74 @@
+import toInteger from '../_lib/toInteger/index'
+import toDate from '../toDate/index'
+import requiredArgs from '../_lib/requiredArgs/index'
+
+/**
+ * @name addMonths
+ * @category Month Helpers
+ * @summary Add the specified number of months to the given date.
+ *
+ * @description
+ * Add the specified number of months to the given date.
+ *
+ * ### v2.0.0 breaking changes:
+ *
+ * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
+ *
+ * @param {Date|Number} date - the date to be changed
+ * @param {Number} amount - the amount of months to be added. Positive decimals will be rounded using `Math.floor`, decimals less than zero will be rounded using `Math.ceil`.
+ * @returns {Date} the new date with the months added
+ * @throws {TypeError} 2 arguments required
+ *
+ * @example
+ * // Add 5 months to 1 September 2014:
+ * const result = addMonths(new Date(2014, 8, 1), 5)
+ * //=> Sun Feb 01 2015 00:00:00
+ */
+export default function addMonths(
+  dirtyDate: Date | number,
+  dirtyAmount: number
+): Date {
+  requiredArgs(2, arguments)
+
+  const date = toDate(dirtyDate)
+  const amount = toInteger(dirtyAmount)
+  if (isNaN(amount)) {
+    return new Date(NaN)
+  }
+  if (!amount) {
+    // If 0 months, no-op to avoid changing times in the hour before end of DST
+    return date
+  }
+  const dayOfMonth = date.getDate()
+
+  // The JS Date object supports date math by accepting out-of-bounds values for
+  // month, day, etc. For example, new Date(2020, 0, 0) returns 31 Dec 2019 and
+  // new Date(2020, 13, 1) returns 1 Feb 2021.  This is *almost* the behavior we
+  // want except that dates will wrap around the end of a month, meaning that
+  // new Date(2020, 13, 31) will return 3 Mar 2021 not 28 Feb 2021 as desired. So
+  // we'll default to the end of the desired month by adding 1 to the desired
+  // month and using a date of 0 to back up one day to the end of the desired
+  // month.
+  const endOfDesiredMonth = new Date(date.getTime())
+  endOfDesiredMonth.setMonth(date.getMonth() + amount + 1, 0)
+  const daysInMonth = endOfDesiredMonth.getDate()
+  if (dayOfMonth >= daysInMonth) {
+    // If we're already at the end of the month, then this is the correct date
+    // and we're done.
+    return endOfDesiredMonth
+  } else {
+    // Otherwise, we now know that setting the original day-of-month value won't
+    // cause an overflow, so set the desired day-of-month. Note that we can't
+    // just set the date of `endOfDesiredMonth` because that object may have had
+    // its time changed in the unusual case where where a DST transition was on
+    // the last day of the month and its local time was in the hour skipped or
+    // repeated next to a DST transition.  So we use `date` instead which is
+    // guaranteed to still have the original time.
+    date.setFullYear(
+      endOfDesiredMonth.getFullYear(),
+      endOfDesiredMonth.getMonth(),
+      dayOfMonth
+    )
+    return date
+  }
+}
diff --git a/date-fns/src/addMonths/test.ts b/date-fns/src/addMonths/test.ts
new file mode 100644
index 0000000..fb1afb6
--- /dev/null
+++ b/date-fns/src/addMonths/test.ts
@@ -0,0 +1,173 @@
+// @flow
+/* eslint-env mocha */
+
+import assert from 'assert'
+import addMonths from '.'
+import { getDstTransitions } from '../../test/dst/tzOffsetTransitions'
+
+describe('addMonths', function() {
+  it('adds the given number of months', function() {
+    const result = addMonths(new Date(2014, 8 /* Sep */, 1), 5)
+    assert.deepStrictEqual(result, new Date(2015, 1 /* Feb */, 1))
+  })
+
+  it('accepts a timestamp', function() {
+    const result = addMonths(new Date(2014, 8 /* Sep */, 1).getTime(), 12)
+    assert.deepStrictEqual(result, new Date(2015, 8 /* Sep */, 1))
+  })
+
+  it('converts a fractional number to an integer', function() {
+    const result = addMonths(new Date(2014, 8 /* Sep */, 1), 5.75)
+    assert.deepStrictEqual(result, new Date(2015, 1 /* Feb */, 1))
+  })
+
+  it('implicitly converts number arguments', function() {
+    // @ts-expect-error
+    const result = addMonths(new Date(2014, 8 /* Sep */, 1), '5')
+    assert.deepStrictEqual(result, new Date(2015, 1 /* Feb */, 1))
+  })
+
+  it('does not mutate the original date', function() {
+    const date = new Date(2014, 8 /* Sep */, 1)
+    addMonths(date, 12)
+    assert.deepStrictEqual(date, new Date(2014, 8 /* Sep */, 1))
+  })
+
+  it('works well if the desired month has fewer days and the provided date is in the last day of a month', function() {
+    const date = new Date(2014, 11 /* Dec */, 31)
+    const result = addMonths(date, 2)
+    assert.deepStrictEqual(result, new Date(2015, 1 /* Feb */, 28))
+  })
+
+  it('handles dates before 100 AD', function() {
+    const initialDate = new Date(0)
+    initialDate.setFullYear(0, 0 /* Jan */, 31)
+    initialDate.setHours(0, 0, 0, 0)
+    const expectedResult = new Date(0)
+    expectedResult.setFullYear(0, 1 /* Feb */, 29)
+    expectedResult.setHours(0, 0, 0, 0)
+    const result = addMonths(initialDate, 1)
+    assert.deepStrictEqual(result, expectedResult)
+  })
+
+  it('returns `Invalid Date` if the given date is invalid', function() {
+    const result = addMonths(new Date(NaN), 5)
+    // @ts-expect-error
+    assert(result instanceof Date && isNaN(result))
+  })
+
+  it('returns `Invalid Date` if the given amount is NaN', function() {
+    const result = addMonths(new Date(2014, 8 /* Sep */, 1), NaN)
+    // @ts-expect-error
+    assert(result instanceof Date && isNaN(result))
+  })
+
+  it('throws TypeError exception if passed less than 2 arguments', function() {
+    // @ts-expect-error
+    assert.throws(addMonths.bind(null), TypeError)
+    // @ts-expect-error
+    assert.throws(addMonths.bind(null, 1), TypeError)
+  })
+
+  const dstTransitions = getDstTransitions(2017)
+  const dstOnly = dstTransitions.start && dstTransitions.end ? it : it.skip
+  const tz = Intl.DateTimeFormat().resolvedOptions().timeZone || process.env.tz
+  const HOUR = 1000 * 60 * 60
+  const override = (
+    base: Date,
+    year = base.getFullYear(),
+    month = base.getMonth(),
+    day = base.getDate(),
+    hour = base.getHours(),
+    minute = base.getMinutes()
+  ) => new Date(year, month, day, hour, minute)
+
+  dstOnly(
+    `works at DST-start boundary in local timezone: ${tz || '(unknown)'}`,
+    function() {
+      const date = dstTransitions.start
+      const result = addMonths(date!, 2)
+      assert.deepStrictEqual(
+        result,
+        override(date!, date!.getFullYear(), date!.getMonth() + 2)
+      )
+    }
+  )
+
+  dstOnly(
+    `works at DST-start - 30 mins in local timezone: ${tz || '(unknown)'}`,
+    function() {
+      const date = new Date(dstTransitions.start!.getTime() - 0.5 * HOUR)
+      const result = addMonths(date, 2)
+      const expected = override(date, date.getFullYear(), date.getMonth() + 2)
+      assert.deepStrictEqual(result, expected)
+    }
+  )
+
+  dstOnly(
+    `works at DST-start - 60 mins in local timezone: ${tz || '(unknown)'}`,
+    function() {
+      const date = new Date(dstTransitions.start!.getTime() - 1 * HOUR)
+      const result = addMonths(date, 2)
+      const expected = override(date, date.getFullYear(), date.getMonth() + 2)
+      assert.deepStrictEqual(result, expected)
+    }
+  )
+
+  dstOnly(
+    `works at DST-end boundary in local timezone: ${tz || '(unknown)'}`,
+    function() {
+      const date = dstTransitions.end
+      const result = addMonths(date!, 2)
+      assert.deepStrictEqual(
+        result,
+        override(
+          date!,
+          date!.getFullYear() + (date!.getMonth() >= 10 ? 1 : 0),
+          (date!.getMonth() + 2) % 12 // protect against wrap for Nov.
+        )
+      )
+    }
+  )
+
+  dstOnly(
+    `works at DST-end - 30 mins in local timezone: ${tz || '(unknown)'}`,
+    function() {
+      const date = new Date(dstTransitions.end!.getTime() - 0.5 * HOUR)
+      const result = addMonths(date, 2)
+      assert.deepStrictEqual(
+        result,
+        override(
+          date,
+          date.getFullYear() + (date.getMonth() >= 10 ? 1 : 0),
+          (date.getMonth() + 2) % 12 // protect against wrap for Nov.
+        )
+      )
+    }
+  )
+
+  dstOnly(
+    `works at DST-end - 60 mins in local timezone: ${tz || '(unknown)'}`,
+    function() {
+      const date = new Date(dstTransitions.end!.getTime() - 1 * HOUR)
+      const result = addMonths(date, 2)
+      assert.deepStrictEqual(
+        result,
+        override(
+          date,
+          date.getFullYear() + (date.getMonth() >= 10 ? 1 : 0),
+          (date.getMonth() + 2) % 12 // protect against wrap for Nov.
+        )
+      )
+    }
+  )
+
+  dstOnly(
+    `doesn't mutate if zero increment is used: ${tz || '(unknown)'}`,
+    function() {
+      const date = new Date(dstTransitions.end!)
+      const result = addMonths(date, 0)
+      assert.deepStrictEqual(result, date)
+    }
+  )
+})