国家开放大学2024春《JavaScript程序设计》第五次任务（预备知识：第七章；分值：30分；必做；需辅导教师评分）[参考答案]_实训八：使用jQuery技术实现企业信息展示系统的相关功能

国家开放大学2024春《JavaScript程序设计》第五次任务（预备知识：第七章；分值：30分；必做；需辅导教师评分）[参考答案]_实训八：使用jQuery技术实现企业信息展示系统的相关功能
class Jq {
constructor(arg, root) {
// 记录上次操作的节点；
if (typeof root == 'undefined') {
this.prevObject = new Jq(document, null);
}
if (root) {
this.prevObject = root;
}
if (typeof arg == "string") {
// 字符串
let eles = document.querySelectorAll(arg);
this.addEvent(eles);
} else if (typeof arg == "function") {
window.addEventListener("DOMContentLoaded", arg);
} else {
// 原生节点；
if (typeof arg.length == "undefined") {
this[0] = arg;
this.length = 1;
} else {
this.addEvent(arg);
}
}
}
addEvent(eles) {
eles.forEach((el, index) => {
this[index] = el;
})
this.length = eles.length;
}
eq(index) {
return new Jq(this[index], this);
}
end() {
return this.prevObject;
}
click(fn) {
for (let i = 0; i < this.length; i++) {
this[i].addEventListener("click", fn);
}
}
on(eventName, fn) {
let reg = /s+/g;
eventName = eventName.replace(reg, " ");
// console.log(eventName);
let eventArr = eventName.split(" ");
for (let i = 0; i < eventArr.length; i++) {
for (let j = 0; j < this.length; j++) {
this[j].addEventListener(eventArr[i], fn);
}
}
}
css(...arg) {
if (arg.length > 1) {
if(arg[0] in $.cssHooks){
let item=arg[0];
for (let i = 0; i < this.length; i++) {
$.cssHooks[item].set(this[i],arg[1]);
}
}
else{
// 2个参数
// 设置样式
for (let i = 0; i < this.length; i++) {
this.setStyle(this[i], arg[0], arg[1]);
}
}
} else {
// 1个参数：--》字符串、对象；[obj]
if (typeof arg[0] == 'string') {
if(arg[0]=="wh"&&arg[0] in $.cssHooks){
return $.cssHooks[arg[0]].get(this[0]);
}else{
// 字符串：获取样式
return this.getStyle(this[0], arg[0]);
}
} else {
// 对象；设置样式
for (let i = 0; i < this.length; i++) {
for (let j in arg[0]) {
this.setStyle(this[i], j, arg[0][j]);
}
}
}
}
}
setStyle(ele, styleName, styleValue) {
if (typeof styleValue == "number" && !(styleName in $.cssNumber)) {
styleValue = styleValue + "px";
}
ele.style[styleName] = styleValue;
}
getStyle(ele, styleName) {
return window.getComputedStyle(ele, null)[styleName];
}
}
function $(arg) {
return new Jq(arg);
}
$.cssNumber = {
animationIterationCount: true,
columnCount: true,
fillOpacity: true,
flexGrow: true,
flexShrink: true,
fontWeight: true,
gridArea: true,
gridColumn: true,
gridColumnEnd: true,
gridColumnStart: true,
gridRow: true,
gridRowEnd: true,
gridRowStart: true,
lineHeight: true,
opacity: true,
order: true,
orphans: true,
pm: true,
widows: true,
zIndex: true,
zoom: true
}
$.cssHooks={
}

}else{
// 字符串：获取样式
return this.getStyle(this[0], arg[0]);
}
} else {
// 对象；设置样式
for (let i = 0; i < this.length; i++) {
for (let j in arg[0]) {
this.setStyle(this[i], j, arg[0][j]);
}
}
}
}
}
setStyle(ele, styleName, styleValue) {
if (typeof styleValue == "number" && !(styleName in $.cssNumber)) {
styleValue = styleValue + "px"