javascript - 搜索栏未显示或正在处理分页项目以显示学生
问题描述
我创建了一个学生列表并将他们显示在一个页面上,并带有该项目的相关分页按钮。我现在可以让学生和按钮正常工作,但我需要制作一个搜索栏并允许它过滤结果,但我无法让它工作。
我已经将 keyup 条目的事件监听器放在了 searchStudents 函数中,但我觉得我的条件语句是错误的?
JS代码:
//*****Extra credits attempt******
//Search form
//Create and append search bar with button
const appendSearchForm = () => {
//declare variables for search bar
const pageHeader = document.getElementsByClassName('page-header');
const searchDiv = document.createElement('div');
const searchInput = document.createElement('input');
const searchBtn = document.createElement('button');
//setup variables properties/values
searchDiv.className = 'student-search';
searchInput.setAttribute('placeholder','Search students here');
searchBtn.textContent = 'search';
//append search bar and button to DOM
pageHeader[0].appendChild(searchDiv);
searchDiv.appendChild(searchInput);
searchDiv.appendChild(searchBtn);
}
//Search form function
const searchStudents = list => {
//put results in a new array
let results = [];
//make the student's name and search input upper case
const firstName = list[i].name.first.toUpperCase();
const lastName = list[i].name.last.toUpperCase();
const inputText = searchInput.value.toUpperCase();
//for loop to run through student array
for (let i = 0; i < list.length; i++) {
//If no results found, display No results message.
if (results.length === 0 || !inputText) {
//make new h2 element to put message
const noResults = document.createElement('h2');
//access textContent to display message
noResults.textContent = `No results found for ${searchInput.value}`;
//add a class value
noResults.classList.add('no-results');
//append the message to page element
document.getElementsByClassName('page')[0].appendChild(noResults);
//add the buttons
addPagination(results);
} else {
//if statement and includes method to check input value matches student names
if (firstName.includes(inputText) || lastName.includes(inputText)) {
//adds matches to end of results array
results.push(list[i]);
}
//run the showPage function with results array passed in and buttons
showPage(results, 1);
addPagination(results);
}
}
//Event listener for typing in search box, run search function (does not work with preventdefault)
searchInput.addEventListener('keyup', () => {
searchStudents(data);
});
//Event listener for clicking on button, run search function
searchBtn.addEventListener('click', (event) => {
event.preventDefault();
searchStudents(data);
});
}
//Call all functions
//appendSearchForm();
showPage(data, 1);
addPagination(data);
解决方案
推荐阅读
- java - 应用程序被杀死时 FCM onMessageReceived 不会触发(Android Oreo)
- robotframework - 如何在机器人框架中找到消失的文本字段
- python-3.x - 使用 tensorflow 和 Keras 自定义代码进行迁移学习的验证准确性差异
- gradle - 如何将 intellij 调试器连接到从 Gradle 任务执行的 jar
- python-3.x - ImportError:无法从“astropy.utils”导入名称“_compiler”
- angular - Angular:在构造函数中使用注入令牌测试组件
- javascript - 无法通过 Charts.JS 显示数据
- javascript - 从 Cloud Functions 中删除 Cloud Task
- angular - 无法在角度 9 的地图中读取未定义的属性“addBubble”
- python - 我可以在使用 pandas read_csv 导入时将列名全部设为小写吗?