window.jQuery = function(nodeOrSelector) {
let nodes = {}
if (typeof nodeOrSelector === 'string'){
let temp = document.querySelectorAll(nodeOrSelector)
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 }
}
nodes.addClass = function(classes) {
classes.forEach((value) => {
for(let i = 0; i<nodes.length; i++){nodes[i].classList.add(value)}
} )
}
nodes.text = function(text) {
if (text === undefined){
var texts = []
for (let i = 0 ;i< nodes.length; i++){
texts.push(nodes[i].textContent)
}
return texts
}else{
for(let i = 0; i<nodes.length; i++){
nodes[i].textContent = text
}
}
}
return nodes
}
window.$ = jQuery
var $div = $('div')
$div.addClass('red')
$div.text('hi')
$div.addClass('red') ：可將所有div的class添加一個(gè) red太惠；
$div.text('hi') ：可將所有div的text變?yōu)?hi邪铲，對(duì)于jQuery來說，無論是設(shè)置還是獲取都可以用text龙巨。
