效果可以是按下后列表相应的项变色就行,如能给出详细代码,必有重酬。
1条回答 默认 最新
- Stephen_112 2021-11-09 09:46关注
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <style> /* body{background-color: fuchsia} */ </style> </head> <body> <div class="container"> <div> <button id="first">选择第一行</button> <button id="second">选择第二行</button> </div> <div> <button id="odd">选择奇数行</button> <button id="even">选择偶数行</button> <button id="all">选择所有行</button> </div> <div> <button id="clear">清除样式</button> <button id="add">添加</button> <button id="delete">删除</button> </div> <div> <ul class="ul"> <li>LL</li> <li>ZJW</li> <li>AA</li> <li>BB</li> <li>CC</li> </ul> </div> </div> </body> <script> function set(type) { let li = document.getElementsByClassName('ul')[0].getElementsByTagName('li'); let appendli = document.createElement('li'); let ul = document.getElementsByClassName('ul')[0]; if (type == "add") { appendli.innerHTML = "new"; ul.appendChild(appendli); }else if(type == 'delete'){ // console.log(); ul.removeChild(li[li.length - 1]); } else { for (let i = 0; i < li.length; i++) { switch (type) { case 'first': i == 0 ? li[i].style.backgroundColor = "red" : li[i].style.backgroundColor = "white"; break; case 'second': i == 1 ? li[i].style.backgroundColor = "green" : li[i].style.backgroundColor = "white"; break; case 'odd': i % 2 == 0 ? li[i].style.backgroundColor = "blue" : li[i].style.backgroundColor = "white"; break; case 'even': i % 2 == 1 ? li[i].style.backgroundColor = "purple" : li[i].style.backgroundColor = "white"; break; case 'all': li[i].style.backgroundColor = "fuchsia"; break; case 'clear': li[i].style.backgroundColor = "white"; break; } } } } document.getElementById('first').addEventListener('click', function () { set('first'); }); document.getElementById('second').addEventListener('click', function () { set('second'); }); document.getElementById('odd').addEventListener('click', function () { set('odd'); }); document.getElementById('even').addEventListener('click', function () { set('even'); }); document.getElementById('all').addEventListener('click', function () { set('all'); }); document.getElementById('clear').addEventListener('click', function () { set('clear'); }); document.getElementById('add').addEventListener('click', function () { set('add'); }); document.getElementById('delete').addEventListener('click', function () { set('delete'); }); </script> </html>
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