vue/src/platforms/web/runtime/node-ops.js

import { namespaceMap } from 'web/util/index'

export function createElement (tagName) {
  return document.createElement(tagName)
}

export function createElementNS (namespace, tagName) {
  return document.createElementNS(namespaceMap[namespace], tagName)
}

export function createTextNode (text) {
  return document.createTextNode(text)
}

export function insertBefore (parentNode, newNode, referenceNode) {
  parentNode.insertBefore(newNode, referenceNode)
}

export function removeChild (node, child) {
  node.removeChild(child)
}

export function appendChild (node, child) {
  node.appendChild(child)
}

export function parentNode (node) {
  return node.parentElement
}

export function nextSibling (node) {
  return node.nextSibling
}

export function tagName (node) {
  return node.tagName
}

export function setTextContent (node, text) {
  node.textContent = text
}