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day2005-validated-form.html
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day2005-validated-form.html
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<!doctype html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>信息采集页</title>
<style>
body {
background-color: #222;
padding: 20px;
color: #fff;
}
main {
max-width: 750px;
margin: 0 auto;
}
.form {
display: flex;
flex-direction: column;
}
.form > h2 {
position: relative;
text-align: center;
}
.form > h2::after,
.form > h2::before {
content: "";
border-bottom: solid #ff7200 2px;
display: block;
position: absolute;
width: 30%;
left: 0;
top: 50%;
}
.form > h2::after {
right: 0;
left: unset;
}
.form--item {
display: flex;
flex-direction: column;
gap: 6px;
padding-bottom: 8px;
}
.form--feedback {
font-size: .8em;
color: red;
min-height: 1.3em;
transition: .3s;
}
.form--feedback.form--feedback__hidden {
opacity: 0;
}
.form > .form--controls {
display: flex;
gap: 6px;
}
.form > .form--controls > button {
background-color: #666666;
border-radius: 6px;
flex-grow: 1;
color: #fff;
padding: 8px 0;
font-size: 1.2em;
cursor: pointer;
}
.form > .form--controls > button:active {
opacity: .8;
}
.form > .form--controls > button:first-of-type {
background-color: #ff7200;
color: black;
}
.image-upload {
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
padding: 24px;
border-radius: 6px;
background-color: #444;
margin-bottom: 12px;
font-size: 24px;
border: dashed #666 4px;
user-select: none;
cursor: pointer;
}
.image-upload > p {
margin-bottom: 0;
}
.image-preview {
display: flex;
flex-direction: column;
gap: 12px;
width: 100%;
padding-top: 6px;
}
.image-preview > img {
width: 100%;
height: auto;
border-radius: 6px;
object-fit: contain;
}
</style>
</head>
<body>
<main>
<h1>信息采集页</h1>
<form action="https://httpbin.org/post" method="post" class="form">
<h2>基础信息</h2>
<div class="form--item">
<label for="account">账号</label>
<input type="text"
autocomplete="username"
name="account"
id="account"
placeholder="此处填写您的账号">
<span class="form--feedback"></span>
</div>
<div class="form--item">
<label for="password">密码</label>
<input type="password"
autocomplete="current-password"
name="password"
id="password"
placeholder="此处填写您的密码">
<span class="form--feedback"></span>
</div>
<div class="form--item">
<label for="telephone">手机号码</label>
<input type="tel"
autocomplete="tel"
name="telephone"
id="telephone"
placeholder="此处填写您的手机号码">
<span class="form--feedback"></span>
</div>
<div class="form--item">
<label for="email">电子邮箱</label>
<input type="email"
autocomplete="email"
name="email"
id="email"
placeholder="此处填写您的电子邮箱">
<span class="form--feedback"></span>
</div>
<div class="form--item">
<label for="birthday">出生年月日</label>
<input type="date"
autocomplete="birthday"
name="birthday"
id="birthday"
placeholder="此处填写您的出生年月日">
<span class="form--feedback"></span>
</div>
<div class="form--item">
<label for="link">个人主页网址</label>
<input type="url"
autocomplete="url"
name="link"
id="link"
placeholder="此处填写您的个人主页网址">
<span class="form--feedback"></span>
</div>
<h2>上传照片</h2>
<section class="image-upload">
<p>点击上传照片或者拖拽照片到此处</p>
<span class="form--feedback form--feedback__hidden">不要添加同样的照片</span>
<div class="image-preview">
</div>
<input type="file"
name="images"
id="images"
hidden
multiple
accept="image/jpeg,image/png,image/webp">
</section>
<div class="form--controls">
<button type="submit">提交</button>
<button type="reset">重置</button>
</div>
</form>
</main>
<script>
const oInputAccount = document.querySelector("#account");
const oInputPassword = document.querySelector("#password");
const oInputTelephone = document.querySelector("#telephone");
const oInputEmail = document.querySelector("#email");
const oInputLink = document.querySelector("#link");
const oImageUpload = document.querySelector(".image-upload");
const oImagePreview = document.querySelector(".image-preview");
const oImageInput = document.querySelector("#images");
const oImageUploadFeedback = oImageUpload.querySelector(".form--feedback");
const state = {
addedImages: new Set()
};
attachValidator(oInputAccount,
[text => /^[a-zA-Z0-9-_]*$/.test(text),
"账号只能包含字母、数字、下划线、短横线"],
[text => {
const len = text.trim().length;
return 6 <= len && len <= 12;
}, "只能是6到12位"]);
attachValidator(oInputPassword,
[text =>
[/[A-Z]/, /[a-z]/, /[0-9]/, /[~`!@#$%^&*()+-\/\\{}\[|;:'"<>.?]/]
.every(reg => reg.test(text)),
"必须包含大写字母、小写字母、数字、特殊字符"],
[text => {
const len = text.trim().length;
return 6 <= len && len <= 20;
}, "长度只能是6到20位"]);
attachValidator(oInputTelephone, [text => /^[0-9]{11}$/.test(text), "手机号码是11位数字"]);
attachValidator(oInputEmail,
[text => /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/.test(text),
"电子邮箱是“用户名@主机名”的形式"]);
attachValidator(oInputLink, [text => /^(((ht|f)tps?):\/\/)?[\w-]+(\.[\w-]+)+([\w.,@?^=%&:/~+#-]*[\w@?^=%&/~+#-])?$/.test(text), "请填写正确的网址"]);
function attachValidator(input, ...validations) {
const oFeedback = input.closest(".form--item").querySelector(".form--feedback");
oFeedback.classList.add("form--feedback__hidden");
input.addEventListener("input", () => {
let showFeedback = false;
for (const validation of validations) {
const [validator, feedbackText] = validation;
if (!validator(input.value)) {
feedbackText && (oFeedback.textContent = feedbackText);
showFeedback = true;
break;
}
}
if (showFeedback) {
oFeedback.classList.remove("form--feedback__hidden");
} else {
oFeedback.classList.add("form--feedback__hidden");
}
});
}
function addImagePreview(fileList, onDuplicate) {
const newImages = Array.from(fileList).reduce((images, file) => {
if (!state.addedImages.has(file.name)) {
state.addedImages.add(file.name);
const img = document.createElement("img");
img.src = URL.createObjectURL(file);
images.appendChild(img);
} else {
onDuplicate && onDuplicate();
}
return images;
}, document.createDocumentFragment());
oImagePreview.insertBefore(newImages, oImagePreview.firstElementChild);
}
function showImageDuplicateFeedback() {
oImageUploadFeedback.classList.remove("form--feedback__hidden");
setTimeout(() => oImageUploadFeedback.classList.add("form--feedback__hidden"), 4000);
}
oImageUpload.addEventListener("click", () => oImageInput.click());
oImageUpload.addEventListener("drop", e => {
e.preventDefault();
addImagePreview(e.dataTransfer.files, showImageDuplicateFeedback);
});
oImageUpload.addEventListener("dragover", e => e.preventDefault());
oImageInput.addEventListener("change", e => addImagePreview(e.target.files, showImageDuplicateFeedback));
</script>
</body>
</html>