我制作了一个联系人列表应用程序,显示了联系方式。我想基于名称实现搜索功能。现在,当我输入某人的名字时,它应该动态更改联系人列表。
index.html:
var array = [];
function Person(fullName, number, group) {
this.fullName = fullName;
this.number = number;
this.group = group;
array.push(this);
}
Person.prototype.getFullName = function() {
return this.fullName+' '+this.number+' '+this.group;
}
var p1 = new Person("Jonathan Buell",5804337551,"family");
var p2 = new Person("Patrick Daniel",8186934432,"work");
console.log(array);
/*
function save() {
localStorage.setItem("array", JSON.stringify(array));
}
function submitToDb() {
var person = new Person(nameInput.value, numberInput.value, groupInput.value);
// refresh();
}
var storedArray = JSON.parse(localStorage.getItem("array"));
function loadLocalStorage() {
for(var i in storedArray){
array[i] = storedArray[i];
}
// refresh();
}
loadLocalStorage();
*/
function showContacts() {
for(var i in array){
var id = i;
contactlist.innerHTML +=
`
<ul>
<div>
<p>Name: `+ array[i].fullName +`</p>
<p>Number: `+ array[i].number +`</p>
<p>Group: `+ array[i].group +`</p>
<button type="button" class="btn btn-warning" onclick="editContact(`+ id +`)">Edit</button>
<button type="button" class="btn btn-danger">Delete</button>
</div>
`
}
}
showContacts();
function addNew() {
document.getElementById("search").style.display = 'none';
document.getElementById("contactlist").style.display = 'none';
document.getElementById("editcontact").style.display = 'none';
document.getElementById("addnewcontact").style.display = '';
document.getElementById("addnewcontact").innerHTML =
`
<form>
<div class="form-group">
<label for="inputName">Name</label>
<input type="text" class="form-control" id="inputName" aria-describedby="namehelp" placeholder="Enter Name">
</div>
<div class="form-group">
<label for="inputNumber">Number</label>
<input type="text" class="form-control" id="inputNumber" aria-describedby="numberhelp" placeholder="Enter Number">
</div>
<div class="form-group">
<label for="inputGroup">Group</label>
<input type="text" class="form-control" id="inputGroup" aria-describedby="grouphelp" placeholder="Enter Group">
</div>
<button type="submit" class="btn btn-primary" onclick="submittoDB()">Submit</button>
</form>
`;
}
function editContact(id) {
document.getElementById("search").style.display = 'none';
document.getElementById("contactlist").style.display = 'none';
document.getElementById("editcontact").style.display = '';
document.getElementById("editcontact").innerHTML =
`
<form>
<div class="form-group">
<label for="InputName2">Name</label>
<input type="text" class="form-control" id="inputName2" aria-describedby="namehelp" value="`+array[id].fullName+`" >
</div>
<div class="form-group">
<label for="InputNumber2">Number</label>
<input type="text" class="form-control" id="inputNumber2" value="`+array[id].number+`">
</div>
<div class="form-group">
<label for="InputGroup2">Group</label>
<input type="text" class="form-control" id="inputGroup2" value="`+array[id].group+`">
</div>
<button type="submit" class="btn btn-primary" onclick="saveMe(`+id+`)">Submit</button>
</form>
`;
}
/*
function saveMe(id) {
array[id].fullName = document.getElementById("nameInput2").value;
array[id].number = document.getElementById("numberInput2").value;
array[id].group = document.getElementById("groupInput2").value;
}
*/
function deleteMe(id) {
array.splice(id, 1);
// refresh();
// save();
}
.header{
display:flex;
}
.header>div{
float: left;
}
.header .title{
padding-left: 400px;
}
.header .dropdown{
padding-top: 20px;
padding-left: 20px;
}
.header .button{
padding-left: 500px;
padding-top: 5px;
}
.glyphicon-plus-sign{
font-size: 50px;
}
#search form .input-group{
padding-left: 30px;
padding-right: 30px;
padding-bottom: 10px;
}
.input-group{
padding-top: 20px;
}
.form-group{
padding-left: 30px;
padding-right: 30px;
}
form .btn-primary{
margin-left: 30px;
}
<!DOCTYPE html>
<html>
<head>
<title>Contact List App</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link rel="stylesheet" type="text/css" href="index.css">
<script type="text/javascript" src="app.js"></script>
</head>
<body>
<div class="header">
<div id="dropdown">
<div class="dropdown">
<button class="btn btn-primary dropdown-toggle" type="button" data-toggle="dropdown">Sort by Group
<span class="caret"></span></button>
<ul class="dropdown-menu">
<li><a href="#">All</a></li>
<li><a href="#">Work</a></li>
<li><a href="#">Family</a></li>
</ul>
</div>
</div>
<div class="title">
<h2>All Contacts</h2>
</div>
<div class="button" id="addButton">
<p>
<a href="#">
<span class="glyphicon glyphicon-plus-sign" onclick="addNew()"></span>
</a>
</p>
</div>
</div>
<div id="search">
<form>
<div class="input-group">
<input type="text" class="form-control" placeholder="Search">
<div class="input-group-btn">
<button class="btn btn-default" type="submit">
<i class="glyphicon glyphicon-search"></i>
</button>
</div>
</div>
</form>
</div>
<div id="contactlist" >
</div>
<div id="addnewcontact">
</div>
<div id="editcontact">
</div>
</body>
</html>
目前,我正在使用id="contactlist" , id="editcontact" id="addnewcontact"
App live demo:https://jsfiddle.net/ap8xvoo7/
答案 0 :(得分:1)
您的代码段中有很多不相关的代码。但是,通常Array.filter是你的朋友:
const contacts = [
{ fullName: 'Jonathan Buell', number: 5804337551, group: 'family' },
{ fullName: 'Joey Whatever', number: 5454355351, group: 'family' },
{ fullName: 'Patrick Daniel', number: 8186934432, group: 'work' }
];
contacts.filter(contact => contact.fullName.startsWith('Jo'));
/*
Result:
[
{ fullName: 'Jonathan Buell', number: 5804337551, group: 'family' },
{ fullName: 'Joey Whatever', number: 5454355351, group: 'family' }
]
*/
...但是startsWith
区分大小写,它将返回一个小数组'jo'的空数组。
一种解决方案是使用正则表达式:
contacts.filter(contact => contact.fullName.match(/^jo/i));
contacts.filter(contact => contact.fullName.match(/^Jo/i));
/*
The 'i' flag makes matching case-insensitive.
Result is the same as above in both cases.
*/
您可以轻松创建过滤功能:
const filterContacts = (startLetters, contacts) =>
contacts.filter(contact =>
contact.fullName.match(new RegExp(`^${startLetters}`, 'i'))
);
...并像这样使用它:
filterContacts('jo', contacts);
/*
Result:
[
{ fullName: 'Jonathan Buell', number: 5804337551, group: 'family' },
{ fullName: 'Joey Whatever', number: 5454355351, group: 'family' }
]
*/
filterContacts('pat', contacts);
/*
Result:
[
{ fullName: 'Patrick Daniel', number: 8186934432, group: 'work' }
]
*/
...当然将其绑定到搜索输入更改:
searchInput.addEventListener('input', function(event) {
const startLetters = event.target.value;
const filteredContacts = filterContacts(startLetters, contacts);
// …and display filteredContacts in your template
});
工作代码段(需要支持ES2015的现代浏览器):
document.addEventListener('DOMContentLoaded', function() {
const contacts = [
{ fullName: 'Jonathan Buell', number: 5804337551, group: 'family' },
{ fullName: 'Joey Whatever', number: 5454355351, group: 'family' },
{ fullName: 'Patrick Daniel', number: 8186934432, group: 'work' }
];
const filterContacts = (startLetters, contacts) =>
contacts.filter(contact =>
contact.fullName.match(new RegExp(`^${startLetters}`, 'i'))
);
// populate the list with all contacts after the page is loaded:
const contactList = document.querySelector('ul');
contactList.innerHTML = contacts
.map(contact => `<li>${contact.fullName}, ${contact.number}</li>`)
.join('');
// filter contacts when user types something into input, and replace the list contents with filtered contacts:
document.querySelector('input').addEventListener('input', function(event) {
const startLetters = event.target.value;
const filteredContacts = filterContacts(startLetters, contacts);
contactList.innerHTML = filteredContacts
.map(contact => `<li>${contact.fullName}, ${contact.number}</li>`)
.join('');
});
});
<input />
<ul></ul>
一个小小的奖励:如果你想在任何地方搜索,不只是从一开始(所以'ni'会匹配'Patrick Da ni el'< / em>),只需从正则表达式中删除^
。