[英]How to disabled a button using Node.js and Handlebars?
這是一個 Node.js 博客項目。
我有一個博客。 我知道如何創建一個新帖子。 這篇文章有截止日期。 每個帖子都有一個“應用”按鈕。 我希望項目在截止日期后禁用“應用”按鈕。
這是我的方法:
這是架構:
const {Schema, model} = require('mongoose');
const UrlSlugs = require('mongoose-url-slugs');
const PostSchema = new Schema({
user: {
type: Schema.Types.ObjectId,
ref: 'users'
},
category: {
type: Schema.Types.ObjectId,
ref: 'categories'
},
title: {
type: String,
require: true
},
slug: {
type: String
},
status: {
type: String,
default: 'public'
},
allowComments: {
type: Boolean,
require: true
},
body: {
type: String,
require: true
},
file: {
type: String
},
date: {
type: Date,
default: Date.now()
},
dateToApply: {
type: Date
},
comments: [{
type: Schema.Types.ObjectId,
ref: 'comments'
}]
}, {usePushEach: true});
PostSchema.plugin(UrlSlugs('title', {field: 'slug'}));
try {
module.exports = model('posts', PostSchema);
} catch (e) {
module.exports = model('posts');
}
這是路線:
router.get('/', (req, res)=>{
const perPage = 10;
const page = req.query.page || 1;
let dateNow = Date.now();
let applyDate = req.body.dateToApply;
let button = document.getElementById('applyButton');
function showButton() {
if (dateNow > applyDate) {
button.disabled = true;
}
}
Post.find({})
.sort({date: 'desc'})
.skip((perPage*page)-perPage)
.limit(perPage)
.then(posts => {
Post.count().then(postCount=>{
Category.find({}).then(categories => {
res.render('home/index', {
posts: posts,
categories: categories,
current: parseInt(page),
pages: Math.ceil(postCount/perPage)
});
});
});
});
});
這是把手:
<div class="row">
<div class="col-12">
<h1>Home page</h1>
{{#each posts}}
<div class="card mb-4">
<img class="img-fluid" src="/uploads/{{ file }}" alt="Kep">
</div>
<div class="card-body">
<h2 class="card-title">{{title}}</h2>
<p class="card-text">{{body}}</p>
<p>{{generateDate dateToApply 'MMMM DD YYYY'}}</p>
<a href="/post/{{id}}" class="btn btn-primary">More</a>
{{#if showButton}}
<button id="applyBtn" class="btn btn-info">Apply</button>
{{/if}}
</div>
<div class="card-footer">
Date of post {{ generateDate date 'MMMM DD YYYY'}}
</div>
{{/each}}
<ul class="pagination justify-content-center">
{{#pagination current=current pages=pages}}{{/pagination}}
</ul>
</div>
</div>
像這樣的東西:
router.get('/', (req, res)=>{
const perPage = 10;
const page = req.query.page || 1;
let dateNow = Date.now();
Post.find({})
.sort({date: 'desc'})
.skip((perPage*page)-perPage)
.limit(perPage)
.then(posts => {
posts.forEach(post => {
post.deadlinePassed = dateNow > post.dateToApply
})
Post.count().then(postCount=>{
Category.find({}).then(categories => {
res.render('home/index', {
posts: posts,
categories: categories,
current: parseInt(page),
pages: Math.ceil(postCount/perPage)
});
});
});
});
});
在模板中:
<div class="row">
<div class="col-12">
<h1>Home page</h1>
{{#each posts}}
<div class="card mb-4">
<img class="img-fluid" src="/uploads/{{ file }}" alt="Kep">
</div>
<div class="card-body">
<h2 class="card-title">{{title}}</h2>
<p class="card-text">{{body}}</p>
<p>{{generateDate dateToApply 'MMMM DD YYYY'}}</p>
<a href="/post/{{id}}" class="btn btn-primary">More</a>
{{#if showButton}}
<button id="applyBtn" class="btn btn-info" {{#if deadlinePassed}} disabled {{/if}}>Apply</button>
{{/if}}
</div>
<div class="card-footer">
Date of post {{ generateDate date 'MMMM DD YYYY'}}
</div>
{{/each}}
<ul class="pagination justify-content-center">
{{#pagination current=current pages=pages}}{{/pagination}}
</ul>
</div>
</div>
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