【JavaScript】实现两个jQuery API

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/AC_greener/article/details/85018959

window.jQuery = function(nodeOrSelector) {
  var nodes = {}
  //包装这个要返回的jQuery对象
  if(typeof nodeOrSelector === 'string') {
    var temp = document.querySelectorAll(nodeOrSelector)   //伪数组
    for(let i = 0; i <temp.length; i++) {
      nodes[i] = temp[i]
    }
    nodes.length = temp.length
  } else if(nodeOrSelector instanceof Node) {
    nodes = {0: nodeOrSelector, length: 1}
  }

  console.log('nodes', nodes)
  nodes.getSiblings =  function() {
    var allChildren = node.parentNode.children
    var siblings = {length:0}
    for(var i = 0; i < allChildren.length; i++) {
      if(allChildren[i] !== node) {
        siblings[siblings.length++] = allChildren[i]
      }
    }
    console.log(siblings) 

    return siblings
  },

  nodes.addClass = function(classes) {
    classes.forEach((value) => {
      for(var i = 0; i < nodes.length; i++) {
        nodes[i].classList.add(value)
      }
    })
   
  },

  nodes.text = function(text) {
    if(text === undefined) {  //getText
      var texts = []
      for(var i = 0; i < nodes.length; i++) {
        texts.push(nodes[i].textContent)
      }
      console.log(texts)
      return texts
    } else { //setText
      for(var i = 0; i < nodes.length; i++) {
        nodes[i].textContent = text
      }
    }
  }

  return nodes
}

使用：
var my_node = jQuery('ul>li')
更加简洁的使用：
window.$ = jQuery
var my_node2 = $('ul>li')