snabbdom-pragma/src/is.js

'NotReact.createElement' pragma although for snabbdom

export const nullv = (v) => v === null

export const undefinedv = (v) => v === undefined

export const number = (v) => typeof v === 'number'

export const string = (v) => typeof v === 'string'

export const text = (v) => string(v) || number(v)

export const array = (v) => Array.isArray(v)

export const object = (v) => typeof v === 'object' && v !== null

export const fun = (v) => typeof v === 'function'

export const vnode = (v) => object(v) && 'sel' in v && 'data' in v && 'children' in v && 'text' in v

const svgPropsMap = { svg: 1, circle: 1, ellipse: 1, line: 1, polygon: 1,
  polyline: 1, rect: 1, g: 1, path: 1, text: 1 }

export const svg = (v) => v.sel in svgPropsMap