import { VNode , VNodeChild , VNodeProperties } from "./interfaces" ; let toTextVNode = ( data ) : VNode => { return { vnodeSelector : "" , properties : undefined , children : undefined , text : data . toString ( ) , domNode : null , } ; } ; let appendChildren = ( parentSelector , insertions , main ) => { for ( let i = 0 , length = insertions . length ; i < length ; i ++ ) { let item = insertions [ i ] ; if ( Array . isArray ( item ) ) { appendChildren ( parentSelector , item , main ) ; } else { if ( item !== null && item !== undefined && item !== false ) { if ( typeof item === "string" ) { item = toTextVNode ( item ) ; } main . push ( item ) ; } } } } ; param selector param properties param children returns A VNode object, used to render a real DOM later.
 *
 * NOTE: There are  http you should be aware of when updating the virtual DOM.
  export function h ( selector , properties ? , children ? ) ; param selector param children returns A VNode object, used to render a real DOM later.
 *
 * NOTE: There are  http you should be aware of when updating the virtual DOM.
  export function h ( selector , children ) ; export function h ( selector , properties ? , children ? ) { if ( Array . isArray ( properties ) ) { children = properties ; properties = undefined ; } else if ( ( properties && ( typeof ( properties as any ) === "string" || properties . vnodeSelector ) ) || ( children && ( typeof ( children as any ) === "string" || ( children as any ) . vnodeSelector ) ) ) { throw new Error ( "h called with invalid arguments" ) ; } let text ; let flattenedChildren ; if ( children && children . length === 1 && typeof children [ 0 ] === "string" ) { text = children [ 0 ] ; } else if ( children ) { flattenedChildren = [ ] ; appendChildren ( selector , children , flattenedChildren ) ; if ( flattenedChildren . length === 0 ) { flattenedChildren = undefined ; } } return { vnodeSelector : selector , properties : properties , children : flattenedChildren , text : text === "" ? undefined : text , domNode : null , } ; }