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node_modules/@popperjs/core/lib/enums.js.flow

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+// @flow
+export const top: 'top' = 'top';
+export const bottom: 'bottom' = 'bottom';
+export const right: 'right' = 'right';
+export const left: 'left' = 'left';
+export const auto: 'auto' = 'auto';
+export type BasePlacement =
+  | typeof top
+  | typeof bottom
+  | typeof right
+  | typeof left;
+export const basePlacements: Array<BasePlacement> = [top, bottom, right, left];
+
+export const start: 'start' = 'start';
+export const end: 'end' = 'end';
+export type Variation = typeof start | typeof end;
+
+export const clippingParents: 'clippingParents' = 'clippingParents';
+export const viewport: 'viewport' = 'viewport';
+export type Boundary = Element | Array<Element> | typeof clippingParents;
+export type RootBoundary = typeof viewport | 'document';
+
+export const popper: 'popper' = 'popper';
+export const reference: 'reference' = 'reference';
+export type Context = typeof popper | typeof reference;
+
+export type VariationPlacement =
+  | 'top-start'
+  | 'top-end'
+  | 'bottom-start'
+  | 'bottom-end'
+  | 'right-start'
+  | 'right-end'
+  | 'left-start'
+  | 'left-end';
+export type AutoPlacement = 'auto' | 'auto-start' | 'auto-end';
+export type ComputedPlacement = VariationPlacement | BasePlacement;
+export type Placement = AutoPlacement | BasePlacement | VariationPlacement;
+
+export const variationPlacements: Array<VariationPlacement> = basePlacements.reduce(
+  (acc: Array<VariationPlacement>, placement: BasePlacement) =>
+    acc.concat([(`${placement}-${start}`: any), (`${placement}-${end}`: any)]),
+  []
+);
+export const placements: Array<Placement> = [...basePlacements, auto].reduce(
+  (
+    acc: Array<Placement>,
+    placement: BasePlacement | typeof auto
+  ): Array<Placement> =>
+    acc.concat([
+      placement,
+      (`${placement}-${start}`: any),
+      (`${placement}-${end}`: any),
+    ]),
+  []
+);
+
+// modifiers that need to read the DOM
+export const beforeRead: 'beforeRead' = 'beforeRead';
+export const read: 'read' = 'read';
+export const afterRead: 'afterRead' = 'afterRead';
+// pure-logic modifiers
+export const beforeMain: 'beforeMain' = 'beforeMain';
+export const main: 'main' = 'main';
+export const afterMain: 'afterMain' = 'afterMain';
+// modifier with the purpose to write to the DOM (or write into a framework state)
+export const beforeWrite: 'beforeWrite' = 'beforeWrite';
+export const write: 'write' = 'write';
+export const afterWrite: 'afterWrite' = 'afterWrite';
+export const modifierPhases: Array<ModifierPhases> = [
+  beforeRead,
+  read,
+  afterRead,
+  beforeMain,
+  main,
+  afterMain,
+  beforeWrite,
+  write,
+  afterWrite,
+];
+
+export type ModifierPhases =
+  | typeof beforeRead
+  | typeof read
+  | typeof afterRead
+  | typeof beforeMain
+  | typeof main
+  | typeof afterMain
+  | typeof beforeWrite
+  | typeof write
+  | typeof afterWrite;