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import { filterEmpty } from './props-util' ;
import { cloneVNode } from 'vue' ;
import warning from './warning' ;
export function cloneElement ( vnode , nodeProps = { } , override = true , mergeRef = false ) {
let ele = vnode ;
if ( Array . isArray ( vnode ) ) {
ele = filterEmpty ( vnode ) [ 0 ] ;
}
if ( ! ele ) {
return null ;
}
const node = cloneVNode ( ele , nodeProps , mergeRef ) ;
// cloneVNode内部是合并属性，
node . props = override ? { ... node . props , ... nodeProps } : node . props ;
warning ( typeof node . props . class !== 'object' , 'class must be string' ) ;
return node ;
}
export function cloneVNodes ( vnodes , nodeProps = { } , override = true ) {
return vnodes . map ( vnode => cloneElement ( vnode , nodeProps , override ) ) ;
}
