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Add is.observable (#50)

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Sam Verschueren 2018-05-03 05:22:32 +02:00 • committed by Sindre Sorhus
parent 38df0cfb24
commit 55c00956f9
5 changed files with 37 additions and 3 deletions
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9
source/index.ts
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@ -1,4 +1,5 @@
import * as util from 'util';
import symbolObservable from 'symbol-observable';
type TypedArray = Int8Array | Uint8Array | Uint8ClampedArray | Int16Array | Uint16Array | Int32Array | Uint32Array | Float32Array | Float64Array;
type Primitive = null | undefined | string | number | boolean | Symbol;
@ -17,6 +18,7 @@ export const enum TypeName {
Function = 'Function',
GeneratorFunction = 'GeneratorFunction',
AsyncFunction = 'AsyncFunction',
Observable = 'Observable',
Array = 'Array',
Buffer = 'Buffer',
Object = 'Object',
@ -88,6 +90,10 @@ function is(value: any): TypeName { // tslint:disable-line:only-arrow-functions
return TypeName.Function;
}
if (is.observable(value)) {
return TypeName.Observable;
}
if (Array.isArray(value)) {
return TypeName.Array;
}
@ -244,7 +250,8 @@ namespace is { // tslint:disable-line:no-namespace
export const domElement = (value: any) => object(value) && value.nodeType === NODE_TYPE_ELEMENT && string(value.nodeName) &&
!plainObject(value) && DOM_PROPERTIES_TO_CHECK.every(property => property in value);
export const nodeStream = (value: any) => !nullOrUndefined(value) && isObject(value) && function_(value.pipe);
export const observable = (value: any) => Boolean(value && value[symbolObservable] && value === value[symbolObservable]());
export const nodeStream = (value: any) => !nullOrUndefined(value) && isObject(value) && function_(value.pipe) && !observable(value);
export const infinite = (value: any) => value === Infinity || value === -Infinity;