javascript常用模組
阿新 • • 發佈：2018-11-02
一、javascript陣列的幾種遍歷方式
window.onload=function () { //測試資料 arr=[1,2,3,4,5,6] json={'廣東省':['深圳市','廣州市'],'湖南省':['長沙市','耒陽市']} // 方式一：不能遍歷json格式的資料型別 for(var i=0;i<arr.length;i++){ console.log(i+' '+arr[i]) }//方式二：兩種資料型別都可以遍歷 for(var i in json){ console.log(i+' '+json[i]) } //方式三：不能遍歷json格式的資料型別 json.forEach((value, index) => console.log(value,index)) //方式四：ES6新寫法，不能遍歷json格式的資料型別 for (var i of arr){ console.log(i) } }
二、二級聯動
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <select id="province"> <option>請選擇省:</option> </select> <select id="city"> <option>請選擇市:</option> </select> <script> data={"湖南省":["長沙","衡陽"],'廣東省':['廣州','深圳']} provice=document.getElementById('province') city=document.getElementById('city') for(var i in data){ o=document.createElement('option') o.innerHTML=i provice.appendChild(o) } provice.onchange=function (event) { var len = city.options.length if(len>1){ for(var i=0;i<len-1;i++){ city.removeChild(city.options[1]) } } p= this.options[this.selectedIndex].innerHTML c=data[p] for(var i in c){ o=document.createElement('option') o.innerHTML=c[i] city.appendChild(o) } } </script> </body> </html>
三，三級聯動
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <select id="province"> <option>請選擇省:</option> </select> <select id="city"> <option>請選擇市:</option> </select> <select id="block"> <option>請選擇區:</option> </select> <script> data={"湖南省":[{"長沙":['嶽麓區','望城區']},{"衡陽":['珠暉區','耒陽市']}],'廣東省':[{"廣州市":['海珠區','天河區']},{"深圳市":['福田區','南山區']}]} tempdata=[]//[{"長沙":['嶽麓區','望城區']},{"衡陽":['珠暉區','耒陽市']}] lastdata=[]//['嶽麓區','望城區'] provice=document.getElementById('province') city=document.getElementById('city') block=document.getElementById('block') //獲取省列表 for(var i in data){ o=document.createElement('option') o.innerHTML=i provice.appendChild(o) } //選中市後觸發 city.onchange=function(){ console.log(tempdata) var len = block.options.length if(len>1){ for(var i=0;i<len-1;i++){ block.removeChild(block.options[1]) } } p= this.options[this.selectedIndex].innerHTML for(var j in tempdata){ for(var k in tempdata[j]){ if(p==k){ lastdata=tempdata[j][k] } } } for (var i in lastdata){ o=document.createElement('option') o.innerHTML=lastdata[i] block.appendChild(o) } } //選中省後觸發，獲取市列表 provice.onchange=function () { //變更省時清除市和區 var clen = city.options.length var blen = block.options.length if(clen>1){ for(var i=0;i<clen-1;i++){ city.removeChild(city.options[1]) } } if(blen>1){ for(var i=0;i<blen-1;i++){ block.removeChild(block.options[1]) } } //this指向option的父級元素--> select元素，this.selectedIndex表示選中option的索引 p= this.options[this.selectedIndex].innerHTML tempdata=data[p]//[{"長沙":['嶽麓區','望城區']},{"衡陽":['珠暉區','耒陽市']}] for(var i in tempdata){ o=document.createElement('option') for(var j in tempdata[i]){ console.log(j) o.innerHTML=j city.appendChild(o) } } } </script> </body> </html>
四、左側選單
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style> *{ margin: 0; padding: 0; } .left{ width: 20%; height: 500px; float: left; background-color: wheat; } .right{ float: left; width: 80%; height: 500px; background-color: lightgray; } .title{ text-align: center; line-height: 40px; background-color: #0e90d2; color: white; } .item{ padding: 10px; } .hide{ display: none; } </style> </head> <body> <div class="outer"> <div class="left"> <div class="item"> <div class="title">選單一</div> <ul class="con"> <li>111</li> <li>111</li> <li>111</li> </ul> </div> <div class="item"> <div class="title">選單二</div> <ul class="con hide"> <li>222</li> <li>222</li> <li>222</li> </ul> </div> <div class="item"> <div class="title">選單三</div> <ul class="con hide"> <li>333</li> <li>333</li> <li>333</li> </ul> </div> </div> <div class="right"></div> </div> <script> var eles_title=document.getElementsByClassName("title"); for(var i=0;i<eles_title.length;i++){ eles_title[i].onclick=function(){ this.nextElementSibling.classList.remove("hide") for(var j=0;j<eles_title.length;j++){ if(eles_title[j]!=this){ eles_title[j].nextElementSibling.classList.add("hide") } } } } </script> </body> </html>
五、模板對話方塊
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style> .back{ background-color: white; height: 2000px; } .shade{ position: fixed; top: 0; bottom: 0; left:0; right: 0; background-color: grey; opacity: 0.4; } .hide{ display: none; } .models{ position: fixed; top: 50%; left: 50%; margin-left: -100px; margin-top: -100px; height: 200px; width: 200px; background-color: wheat; } </style> </head> <body> <div class="back"> <input class="c" type="button" value="click"> </div> <div class="shade hide handles"></div> <div class="models hide handles"> <input class="c" type="button" value="cancel"> </div> <script> var eles=document.getElementsByClassName("c"); var handles=document.getElementsByClassName("handles"); for(var i=0;i<eles.length;i++){ eles[i].onclick=function(){ if(this.value=="click"){ for(var j=0;j<handles.length;j++){ handles[j].classList.remove("hide"); } } else { for(var j=0;j<handles.length;j++){ handles[j].classList.add("hide"); } } } } </script> </body> </html>
六、表格資料（全選反選取消）
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <button class="select_all">全選</button> <button class="select_reverse">反選</button> <button class="cancel">取消</button> <hr> <table class="server_table" border="2px" cellspacing="2px"> <tr> <td><input type="checkbox" class="item"></td> <td>111</td> <td>111</td> <td>111</td> </tr> <tr> <td><input type="checkbox" class="item"></td> <td>222</td> <td>222</td> <td>222</td> </tr> <tr> <td><input type="checkbox" class="item"></td> <td>333</td> <td>333</td> <td>333</td> </tr> <tr> <td><input type="checkbox" class="item"></td> <td>444</td> <td>444</td> <td>444</td> </tr> </table> <script> /* var ele_all=document.getElementsByClassName("select_all")[0]; var ele_reverse=document.getElementsByClassName("select_reverse")[0]; var ele_cancel=document.getElementsByClassName("cancel")[0]; var input_arr=document.getElementsByClassName("item"); ele_all.onclick=function(){ for(var i=0;i<input_arr.length;i++){ console.log(input_arr[i]); var input=input_arr[i]; input.checked=true; } }; ele_cancel.onclick=function(){ for(var i=0;i<input_arr.length;i++){ console.log(input_arr[i]); var input=input_arr[i]; input.checked=false; } }; ele_reverse.onclick=function(){ for(var i=0;i<input_arr.length;i++){ console.log(input_arr[i]); var input=input_arr[i]; if(input.checked){ input.checked=false; } else{ input.checked=true; } } }; */ var input_arr=document.getElementsByClassName("item"); var button_arr=document.getElementsByTagName("button"); for(var i=0;i<button_arr.length;i++){ button_arr[i].onclick=function(){ for (var j=0;j<input_arr.length;j++){ var inp=input_arr[j] if(this.innerText=="全選"){ console.log("ok"); inp.checked=true; } else if(this.innerText=="取消"){ inp.checked=false; } else { if(inp.checked){ inp.checked=false; }else { inp.checked=true; } } } } } </script> </body> </html>
七、select移動
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style> .outer{ margin: 0 auto; background-color: darkgray; width: 80%; height: 600px;margin-top: 30px; word-spacing: -5px; } #left{ display: inline-block; width: 100px ; height: 140px; background-color: wheat; text-align: center; } #choice{ display: inline-block; height: 140px; background-color: darkolivegreen; vertical-align: top; padding:0 5px; } #choice button{ margin-top: 20px; } #right{ display: inline-block; width: 100px ; height: 140px; background-color: wheat; text-align: center; line-height: 140px; } </style> </head> <body> <div class="outer"> <select multiple="multiple" size="5" id="left"> <option>紅樓夢</option> <option>西遊記</option> <option>水滸傳</option> <option>JinPingMei</option> <option>三國演義</option> </select> <span id="choice"> <button id="choose_move"> > </button><br> <button id="all_move"> >> </button> </span> <select multiple="multiple" size="10" id="right"> <option>放風箏的人</option> </select> </div> <script> var choose_move=document.getElementById("choose_move"); var all_move=document.getElementById("all_move"); var right=document.getElementById("right"); var left=document.getElementById("left"); var options=left.options; choose_move.onclick=function(){ for (var i=0; i<options.length;i++){ var option=options[i]; if(option.selected==true){ // var news=option.cloneNode(true); // console.log(news); right.appendChild(option); i--; } } }; all_move.onclick=function(){ for (var i=0; i<options.length;i++){ var option=options[i]; right.appendChild(option); i--; }; }; /* var buttons=document.getElementsByTagName("button"); for(var i=0;i<buttons.length;i++) { buttons[i].onclick = function () { for (var i = 0; i < options.length; i++) { var option = options[i]; if (this.innerText == ">") { if (option.selected == true) { // var news=option.cloneNode(true); // console.log(news); right.appendChild(option); i--; } } else { right.appendChild(option); i--; } } }; } */ </script> </body> </html>
八、跑馬燈
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>tab</title> <style> *{margin:0; padding:0; list-style:none;} body{ font-family: "Helvetica Neue", "Hiragino Sans GB", "Microsoft YaHei", "\9ED1\4F53", Arial, sans-serif; } h3{ text-align: center; color:darkcyan; margin-top: 30px; letter-spacing: 5px; } .box{ width: 1000px; margin:50px auto 0px; } #title{ line-height: 40px; background-color: rgb(247,247,247); font-size: 16px; font-weight: bold; color: rgb(102,102,102); } #title span{ float: left; width: 166px; text-align: center; } #title span:hover{ /*color: black;*/ cursor: pointer; } #content{ margin-top: 20px; } #content li{ width: 1050px; display: none; background-color: rgb(247,247,247); } #content li div{ width: 156px; margin-right: 14px; float: left; text-align: center; } #content li div a{ font-size: 14px; color: black; line-height: 14px; /* float: left;*/ display: inline-block; margin-top: 10px; } #content li a:hover{ color: #B70606; } #content li div span{ font-size: 16px; line-height: 16px; /*float: left;*/ display: block; color: rgb(102,102,102); margin-top: 10px; } #content img{ float: left; width: 155px; height: 250px; } #title .select{ background-color: #2459a2; color: white; border-radius: 10%; } #content .show{ display: block; } .show span{ color: red!important; font-size: 30px; } </style> </head> <body> <h3 id="wel">京東商城歡迎您</h3> <!-- direction="right up down left" --> <!-- behavior：滾動方式(包括3個值：scroll、slide、alternate) --> <!-- 說明：scroll：迴圈滾動，預設效果；slide：只滾動一次就停止；alternate：來回交替進行滾動。 --> <!-- scrollamount="5" 滾動速度 --> <marquee behavior="scroll" direction="right">歡迎您苑昊先生</marquee> <script> function test(){ var mywel = document.getElementById("wel"); var content = mywel.innerText; var f_content = content.charAt(0); var l_content = content.substring(1,content.length); var new_content = l_content + f_content; mywel.innerText = new_content; } // setInterval("test();", 500); </script> <div class="box"> <p id="title"> <span class="select">家用電器</span> <span>傢俱</span> <span>汽車</span> <span>食品</span> <span>女鞋</span> <span>醫療保健</span> </p> <ul id="content"> <li class="show"> <div><img src="https://img10.360buyimg.com/n1/s450x450_jfs/t4786/325/2470647304/119102/9e1a4ed5/59005841Nd786a8df.jpg" alt="冰箱"><a href="#">容聲(Ronshen)冰箱</a><span>價格:5600</span></div> <div><img src="https://img12.360buyimg.com/n1/s450x450_jfs/t3037/347/1290968859/201366/7c1028a0/57c00194N9d0a54c6.jpg" alt="洗衣機"><a href="#">海爾洗衣機</a><span>價格:5400</span></div> <div><img src="https://img11.360buyimg.com/n1/jfs/t3289/128/2393835119/236360/af1d283b/57e0f300N53dde603.jpg" alt="電飯煲"><a href="#">福庫(CUCKOO)電飯煲</a><span>價格:3999</span></div> <div><img src="https://img13.360buyimg.com/n1/jfs/t3235/137/2361713777/152258/a6908440/57e098c2N44a90a5d.jpg" alt="智慧電視"><a href="#">三星智慧電視</a><span>價格:8999</span></div> <div><img src="https://img10.360buyimg.com/n1/jfs/t2053/101/1391591157/215066/572e131b/5696ee9bN2376492d.jpg" alt="淨水器"><a href="#">淨水器</a><span>價格:1300</span></div> <div><img src="https://img14.360buyimg.com/n1/jfs/t3175/78/2357430273/262835/9a8e7f65/57e0a3e9Nbda39dd2.jpg" alt="空氣淨化器"><a href="#">空氣淨化器</a><span>價格:5300</span></div> </li> <li> <div><img src="https://img12.360buyimg.com/n1/jfs/t1948/172/2877517581/556924/682eb107/56f63dc8Naddf77e5.jpg" alt="沙發"><a href="#">沙發</a><span>價格:2900</span></div> <div><img src="https://img12.360buyimg.com/n1/jfs/t1948/172/2877517581/556924/682eb107/56f63dc8Naddf77e5.jpg" alt="沙發"><a href="#">沙發</a><span>價格:2900</span></div> <div><img src="https://img12.360buyimg.com/n1/jfs/t1948/172/2877517581/556924/682eb107/56f63dc8Naddf77e5.jpg" alt="沙發"><a href="#">沙發</a><span>價格:2900</span></div> <div><img src="https://img12.360buyimg.com/n1/jfs/t1948/172/2877517581/556924/682eb107/56f63dc8Naddf77e5.jpg" alt="沙發"><a href="#">沙發</a><span>價格:2900</span></div> <div><img src="https://img12.360buyimg.com/n1/jfs/t1948/172/2877517581/556924/682eb107/56f63dc8Naddf77e5.jpg" alt="沙發"><a href="#">沙發</a><span>價格:2900</span></div> <div><img src="https://img12.360buyimg.com/n1/jfs/t1948/172/2877517581/556924/682eb107/56f63dc8Naddf77e5.jpg" alt="沙發"><a href="#">沙發</a><span>價格:2900</span></div> </li> <li> <div><img src="http://img11.360buyimg.com/n1/jfs/t4969/76/45396935/144539/347153d4/58d9cff4N36872ad6.jpg" alt="長安汽車"><a href="#">長安汽車</a><span>價格:12900</span></div> <div><img src="http://img11.360buyimg.com/n1/jfs/t4969/76/45396935/144539/347153d4/58d9cff4N36872ad6.jpg" alt="長安汽車"><a href="#">長安汽車</a><span>價格:12900</span></div> <div><img src="http://img11.360buyimg.com/n1/jfs/t4969/76/45396935/144539/347153d4/58d9cff4N36872ad6.jpg" alt="長安汽車"><a href="#">長安汽車</a><span>價格:12900</span></div> <div><img src="http://img11.360buyimg.com/n1/jfs/t4969/76/45396935/144539/347153d4/58d9cff4N36872ad6.jpg" alt="長安汽車"><a href="#">長安汽車</a><span>價格:12900</span></div> <div><img src="http://img11.360buyimg.com/n1/jfs/t4969/76/45396935/144539/347153d4/58d9cff4N36872ad6.jpg" alt="長安汽車"><a href="#">長安汽車</a><span>價格:12900</span></div> <div><img src="http://img11.360buyimg.com/n1/jfs/t4969/76/45396935/144539/347153d4/58d9cff4N36872ad6.jpg" alt="長安汽車"><a href="#">長安汽車</a><span>價格:12900</span></div> </li> <li> <div><img src="https://img14.360buyimg.com/n1/jfs/t4414/110/2582917360/207971/b7e129ad/58f0ee1fN94425de1.jpg" alt="嘉興粽子"><a href="#">嘉興粽子</a><span>價格:1</span></div> <div><img src="https://img14.360buyimg.com/n1/jfs/t4414/110/2582917360/207971/b7e129ad/58f0ee1fN94425de1.jpg" alt="嘉興粽子"><a href="#">嘉興粽子</a><span>價格:1</span></div> <div><img src="https://img14.360buyimg.com/n1/jfs/t4414/110/2582917360/207971/b7e129ad/58f0ee1fN94425de1.jpg" alt="嘉興粽子"><a href="#">嘉興粽子</a><span>價格:1</span></div> <div><img src="https://img14.360buyimg.com/n1/jfs/t4414/110/2582917360/207971/b7e129ad/58f0ee1fN94425de1.jpg" alt="嘉興粽子"><a href="#">嘉興粽子</a><span>價格:1</span></div> <div><img src="https://img14.360buyimg.com/n1/jfs/t4414/110/2582917360/207971/b7e129ad/58f0ee1fN94425de1.jpg" alt="嘉興粽子"><a href="#">嘉興粽子</a><span>價格:1</span></div> <div><img src="https://img14.360buyimg.com/n1/jfs/t4414/110/2582917360/207971/b7e129ad/58f0ee1fN94425de1.jpg" alt="嘉興粽子"><a href="#">嘉興粽子</a><span>價格:1</span></div> </li> <li> <div><img src="https://img14.360buyimg.com/n1/jfs/t3079/298/5759209435/92674/14818594/587f1c33N53e5d2a9.jpg" alt="星期六"><a href="#">星期六</a><span>價格:439</span></div> <div><img src="https://img14.360buyimg.com/n1/jfs/t3079/298/5759209435/92674/14818594/587f1c33N53e5d2a9.jpg" alt="星期六"><a href="#">星期六</a><span>價格:439</span></div> <div><img src="https://img14.360buyimg.com/n1/jfs/t3079/298/5759209435/92674/14818594/587f1c33N53e5d2a9.jpg" alt="星期六"><a href="#">星期六</a><span>價格:439</span></div> <div><img src="https://img14.360buyimg.com/n1/jfs/t3079/298/5759209435/92674/14818594/587f1c33N53e5d2a9.jpg" alt="星期六"><a href="#">星期六</a><span>價格:439</span></div> <div><img src="https://img14.360buyimg.com/n1/jfs/t3079/298/5759209435/92674/14818594/587f1c33N53e5d2a9.jpg" alt="星期六"><a href="#">星期六</a><span>價格:439</span></div> <div><img src="https://img14.360buyimg.com/n1/jfs/t3079/298/5759209435/92674/14818594/587f1c33N53e5d2a9.jpg" alt="星期六"><a href="#">星期六</a><span>價格:439</span></div> </li> <li> <div><img src="https://img12.360buyimg.com/n1/jfs/t5755/127/1139389729/356866/99d4e869/5923e410Nb2983f70.jpg" alt="匯仁 腎寶片"><a href="#">匯仁 腎寶片</a><span>價格:322</span></div> <div><img src="https://img12.360buyimg.com/n1/jfs/t5755/127/1139389729/356866/99d4e869/5923e410Nb2983f70.jpg" alt="匯仁 腎寶片"><a href="#">匯仁 腎寶片</a><span>價格:322</span></div> <div><img src="https://img12.360buyimg.com/n1/jfs/t5755/127/1139389729/356866/99d4e869/5923e410Nb2983f70.jpg" alt="匯仁 腎寶片"><a href="#">匯仁 腎寶片</a><span>價格:322</span></div> <div><img src="https://img12.360buyimg.com/n1/jfs/t5755/127/1139389729/356866/99d4e869/5923e410Nb2983f70.jpg" alt="匯仁 腎寶片"><a href="#">匯仁 腎寶片</a><span>價格:322</span></div> <div><img src="https://img12.360buyimg.com/n1/jfs/t5755/127/1139389729/356866/99d4e869/5923e410Nb2983f70.jpg" alt="匯仁 腎寶片"><a href="#">匯仁 腎寶片</a><span>價格:322</span></div> <div><img src="https://img12.360buyimg.com/n1/jfs/t5755/127/1139389729/356866/99d4e869/5923e410Nb2983f70.jpg" alt="匯仁 腎寶片"><a href="#">匯仁 腎寶片</a><span>價格:322</span></div> </li> </ul> </div> <script> var title=document.getElementById('title'); var content=document.getElementById('content'); var category=title.getElementsByTagName('span'); var item=content.getElementsByTagName('li'); for (var i = 0; i < category.length; i++) { category[i].index=i; category[i].onclick=function(){ for (var j = 0; j < category.length; j++) { category[j].className=''; item[j].className=''; } this.className='select'; item[this.index].className='show'; } } </script> </body> </html>
九、搜尋框
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <script> function Focus(){ var input=document.getElementById("ID1"); if (input.value=="請輸入使用者名稱"){ input.value=""; } } function Blurs(){ var ele=document.getElementById("ID1"); var val=ele.value; if(!val.trim()){ ele.value="請輸入使用者名稱"; } } </script> </head> <body> <input id="ID1" type="text" value="請輸入使用者名稱" onblur="Blurs()" onfocus="Focus()"> </body> </html>
參考文件：https://www.cnblogs.com/yuanchenqi/articles/6893904.html