当我遇到搜索栏问题时,我正在尝试实施一个简单的分页项目。
这是我迄今为止所取得的成就:
到目前为止我未能实施的内容:
键入搜索查询时:'/ 15',显示2个页面,其中包含相应的条目。 但是,如果我点击第2页链接,它每页显示超过10个条目(默认参数)并返回到第1页,发生相同的错误。 我怀疑页面链接从其他地方获取了错误的值。 我试图调试,似乎他们从$ studentList(整个学生列表)中获取值,但不是从我通过的搜索结果中获取。
总之,我有3个功能
function showPage(studentList, pageNum = 1){
const showPerPage = 10;
$(studentList).hide();
const calcStart = (pageNum) => pageNum === 1 ? 0 : (pageNum - 1) * showPerPage;
const start = calcStart(pageNum);
const end = pageNum * showPerPage;
$(studentList).slice(start,end).each(function(i, li){
$(li).fadeIn(50);
});
}
function appendPageLinks(studentList){
totalPageNum = Math.ceil(studentList.length / 10);
const pagination = 'pagination';
if($('.pagination').length === 0){
$('.page').append(`
<div class="${pagination}">
<ul></ul>
</div>
`);
}
$('.pagination ul').children().remove();
if (totalPageNum > 1){
for(let i=0; i<totalPageNum; i++){
const pageLink = `
<li>
<a href="#">${i + 1}</a>
</li>
`;
$('.pagination ul').append(pageLink);
}
}
$('.pagination ul li').children().first().addClass('active');
$('.pagination ul').on('click', 'a', function(e){
e.preventDefault();
const pgNum = parseInt($(e.target).text());
showPage(studentList, pgNum);
$(this).parent().siblings().children().removeClass('active');
$(this).addClass('active');
});
}
function searchStudent(element, filter){
$(element).each(function(){
if($(this).text().toUpperCase().includes(filter)){
$(this).show();
} else {
$(this).hide();
}
});
let num = $('.student-item:not([style*="display: none"])').length;
let searchRes = $('.student-item:not([style*="display: none"])');
num > 0 ? $('.notFound').hide() : $('.notFound').show();
return searchRes;
}
我认为这些事件监听器没有得到正确的值:
$('.student-search input').on('keyup', function(){
const searchQuery = $(this).val();
const searchResults = searchStudent($('.student-list li'), searchQuery.toUpperCase());
showPage(searchResults);
appendPageLinks(searchResults);
});
以及上面这个
$('.pagination ul').on('click', 'a', function(e)
这是codepen上的源代码: https://codepen.io/hopper86/pen/WJmMMG?editors=1010
如果有人可以建议如何修复以正确更新页面链接。
答案 0 :(得分:1)
$('.pagination ul').on('click', 'a', function(e){
e.preventDefault();
const pgNum = parseInt($(e.target).text());
showPage(studentList, pgNum);
$(this).parent().siblings().children().removeClass('active');
$(this).addClass('active');
});
问题在于上述功能( showPage(studentList,pgNum); )。当您单击分页链接时,整个学生数组将作为studentList传递。相反,您可能只想发送搜索查询为您提供新studentArray后获得的结果。
下面是我做过一些改动的js,可能会得到你想要的结果。
// Setting up variables
const $studentList = $('.student-list').children();
var $changedStudentList = $studentList;
$('.student-list').prepend('<div class="notFound"></div>');
$('.notFound').html(`<span>No results</span>`);
$('.notFound').hide();
// Bulding a list of ten students and displaying them on the page
function showPage(studentList, pageNum = 1){
const showPerPage = 10;
// hide all students on the page
$(studentList).hide();
// Get start/end for each student based on the page number
const calcStart = (pageNum) => pageNum === 1 ? 0 : (pageNum - 1) * showPerPage;
const start = calcStart(pageNum);
const end = pageNum * showPerPage;
// Looping through all students in studentList
$(studentList).slice(start,end).each(function(i, li){
// if student should be on this page number
// show the student
$(li).fadeIn(50);
});
}
// Search component
const searchBar = `
<div class="student-search">
<input placeholder="Search for students...">
<button>Search</button>
</div>
`;
$('.page-header').append(searchBar);
$('.student-search input').on('keyup', function(){
const searchQuery = $(this).val();
const searchResults = searchStudent($('.student-list li'), searchQuery.toUpperCase());
$changedStudentList = searchResults;
showPage(searchResults);
appendPageLinks(searchResults);
});
// Student search
function searchStudent(element, filter){
$(element).each(function(){
if($(this).text().toUpperCase().includes(filter)){
$(this).show();
} else {
$(this).hide();
}
});
let num = $('.student-item:not([style*="display: none"])').length;
let searchRes = $('.student-item:not([style*="display: none"])');
num > 0 ? $('.notFound').hide() : $('.notFound').show();
return searchRes;
};
// Creating all page links based on a list of students
function appendPageLinks(studentList){
// determine how many pages for this student list
totalPageNum = Math.ceil(studentList.length / 10);
// create a page link section
const pagination = 'pagination';
// add a page link to the page link section
// if class the element already exists
if($('.pagination').length === 0){
$('.page').append(`
<div class="${pagination}">
<ul></ul>
</div>
`);
}
// remove the old page link section from the site
$('.pagination ul').children().remove();
if (totalPageNum > 1){
// 'for' every page
for(let i=0; i<totalPageNum; i++){
const pageLink = `
<li>
<a href="#">${i + 1}</a>
</li>
`;
// append our new page link section to the site
$('.pagination ul').append(pageLink);
}
}
$('.pagination ul li').children().first().addClass('active');
// define what happens when you click a link (event listener)
$('.pagination ul').on('click', 'a', function(e){
e.preventDefault();
const pgNum = parseInt($(e.target).text());
// Use showPage() to display the page for the link clicked
showPage($changedStudentList, pgNum);
// mark that link as 'active'
$(this).parent().siblings().children().removeClass('active');
$(this).addClass('active');
});
}
showPage($studentList);
appendPageLinks($studentList);