我正在通过https://javascript30.com挑战5.我已经找到了解决方案,但我正在尝试升级'这样所有人都可以打开'在新面板打开之前,面板将关闭。
无论如何,更具体地说,在这种情况下,当点击一个面板时,我需要closeOpens()
才能运行。 之后,我需要点击面板继续打开等等。
const PANELS = document.querySelectorAll('.panel');
/**
* Look for open panels and close them.
*/
function closeOpens() {
let opens = document.querySelectorAll('.open');
console.log('hi'); // TODO: Doesn't display!
// Close any 'open' panels first!
if (opens.length > 0) {
opens.forEach((o) => {
o.classList.remove('open');
});
}
}
PANELS.forEach((panel) => {
panel.addEventListener('click', closeOpens => {
panel.classList.add('open');
});
panel.addEventListener('transitionend', e => {
if (e.propertyName.includes('flex')) {
e.target.classList.toggle('v-slide-in');
}
});
});
如上所述,console.log('hi');
未运行。 'click'
事件只会进入...add('open)'
为了完整性,这里是标记和样式的其余部分,但这实际上只是一个JS问题:
<style>
html {
box-sizing: border-box;
background: #ffc600;
font-family: 'helvetica neue';
font-size: 20px;
font-weight: 200;
}
body {
margin: 0;
}
*,
*: before,
*: after {
box-sizing: inherit;
}
.panels {
min-height: 100vh;
overflow: hidden;
display: flex;
}
.panel {
background: #6B0F9C;
box-shadow: inset 0 0 0 5px rgba(255, 255, 255, 0.1);
color: white;
text-align: center;
align-items: center;
/* Safari transitionend event.propertyName === flex */
/* Chrome + FF transitionend event.propertyName === flex-grow */
transition: font-size 0.7s cubic-bezier(0.61, -0.19, 0.7, -0.11),
flex 0.7s cubic-bezier(0.61, -0.19, 0.7, -0.11),
background 0.2s;
font-size: 20px;
background-size: cover;
background-position: center;
flex: 1;
/* Split space amongst children */
display: flex;
flex-direction: column;
justify-content: center;
}
.panel1 {
background-image: url(https://source.unsplash.com/gYl-UtwNg_I/1500x1500);
}
.panel2 {
background-image: url(https://source.unsplash.com/rFKUFzjPYiQ/1500x1500);
}
.panel3 {
background-image: url(https://images.unsplash.com/photo-1465188162913-8fb5709d6d57?ixlib=rb-0.3.5&q=80&fm=jpg&crop=faces&cs=tinysrgb&w=1500&h=1500&fit=crop&s=967e8a713a4e395260793fc8c802901d);
}
.panel4 {
background-image: url(https://source.unsplash.com/ITjiVXcwVng/1500x1500);
}
.panel5 {
background-image: url(https://source.unsplash.com/3MNzGlQM7qs/1500x1500);
}
.panel>* {
margin: 0;
width: 100%;
transition: transform 0.5s;
flex: 1 0 auto;
display: flex;
justify-content: center;
align-items: center;
}
.panel>*:first-child {
transform: translateY(-100%);
}
.panel.v-slide-in>*:first-child,
.panel.v-slide-in>*:last-child {
transform: translateY(0);
}
.panel>*:last-child {
transform: translateY(100%);
}
.panel p {
text-transform: uppercase;
font-family: 'Amatic SC', cursive;
text-shadow: 0 0 4px rgba(0, 0, 0, 0.72), 0 0 14px rgba(0, 0, 0, 0.45);
font-size: 2em;
}
.panel p: nth-child(2) {
font-size: 4em;
}
.panel.open {
font-size: 40px;
flex: 5;
}
</style>
<div class="panels">
<div class="panel panel1">
<p>Hey</p>
<p>Let's</p>
<p>Dance</p>
</div>
<div class="panel panel2">
<p>Give</p>
<p>Take</p>
<p>Receive</p>
</div>
<div class="panel panel3">
<p>Experience</p>
<p>It</p>
<p>Today</p>
</div>
<div class="panel panel4">
<p>Give</p>
<p>All</p>
<p>You can</p>
</div>
<div class="panel panel5">
<p>Life</p>
<p>In</p>
<p>Motion</p>
</div>
</div>
答案 0 :(得分:3)
只需在点击处理程序中调用closeOpens()
即可。它将关闭现有的打开面板,然后打开单击的面板。
panel.addEventListener('click', () => {
closeOpens();
panel.classList.add('open');
});
const PANELS = document.querySelectorAll('.panel');
/**
* Look for open panels and close them.
*/
function closeOpens() {
let opens = document.querySelectorAll('.open');
console.log('hi'); // TODO: Doesn't display!
// Close any 'open' panels first!
if (opens.length > 0) {
opens.forEach((o) => {
o.classList.remove('open');
});
}
}
PANELS.forEach((panel) => {
panel.addEventListener('click', () => {
closeOpens();
panel.classList.add('open');
});
panel.addEventListener('transitionend', e => {
if (e.propertyName.includes('flex')) {
e.target.classList.toggle('v-slide-in');
}
});
});
html {
box-sizing: border-box;
background: #ffc600;
font-family: 'helvetica neue';
font-size: 20px;
font-weight: 200;
}
body {
margin: 0;
}
*,
*: before,
*: after {
box-sizing: inherit;
}
.panels {
min-height: 100vh;
overflow: hidden;
display: flex;
}
.panel {
background: #6B0F9C;
box-shadow: inset 0 0 0 5px rgba(255, 255, 255, 0.1);
color: white;
text-align: center;
align-items: center;
/* Safari transitionend event.propertyName === flex */
/* Chrome + FF transitionend event.propertyName === flex-grow */
transition: font-size 0.7s cubic-bezier(0.61, -0.19, 0.7, -0.11),
flex 0.7s cubic-bezier(0.61, -0.19, 0.7, -0.11),
background 0.2s;
font-size: 20px;
background-size: cover;
background-position: center;
flex: 1;
/* Split space amongst children */
display: flex;
flex-direction: column;
justify-content: center;
}
.panel1 {
background-image: url(https://source.unsplash.com/gYl-UtwNg_I/1500x1500);
}
.panel2 {
background-image: url(https://source.unsplash.com/rFKUFzjPYiQ/1500x1500);
}
.panel3 {
background-image: url(https://images.unsplash.com/photo-1465188162913-8fb5709d6d57?ixlib=rb-0.3.5&q=80&fm=jpg&crop=faces&cs=tinysrgb&w=1500&h=1500&fit=crop&s=967e8a713a4e395260793fc8c802901d);
}
.panel4 {
background-image: url(https://source.unsplash.com/ITjiVXcwVng/1500x1500);
}
.panel5 {
background-image: url(https://source.unsplash.com/3MNzGlQM7qs/1500x1500);
}
.panel>* {
margin: 0;
width: 100%;
transition: transform 0.5s;
flex: 1 0 auto;
display: flex;
justify-content: center;
align-items: center;
}
.panel>*:first-child {
transform: translateY(-100%);
}
.panel.v-slide-in>*:first-child,
.panel.v-slide-in>*:last-child {
transform: translateY(0);
}
.panel>*:last-child {
transform: translateY(100%);
}
.panel p {
text-transform: uppercase;
font-family: 'Amatic SC', cursive;
text-shadow: 0 0 4px rgba(0, 0, 0, 0.72), 0 0 14px rgba(0, 0, 0, 0.45);
font-size: 2em;
}
.panel p: nth-child(2) {
font-size: 4em;
}
.panel.open {
font-size: 40px;
flex: 5;
}
<div class="panels">
<div class="panel panel1">
<p>Hey</p>
<p>Let's</p>
<p>Dance</p>
</div>
<div class="panel panel2">
<p>Give</p>
<p>Take</p>
<p>Receive</p>
</div>
<div class="panel panel3">
<p>Experience</p>
<p>It</p>
<p>Today</p>
</div>
<div class="panel panel4">
<p>Give</p>
<p>All</p>
<p>You can</p>
</div>
<div class="panel panel5">
<p>Life</p>
<p>In</p>
<p>Motion</p>
</div>
</div>
答案 1 :(得分:0)
听起来你要执行两个功能:关闭所有面板,然后打开一个面板。从您需要执行的两个任务开始,不要担心事件。
function closePanels(){
//do work
}
function openPanel(el){
//do work
}
既然你有能力做你需要做的事情,你可以在逻辑多步骤任务中连接它们。
PANELS.forEach((panel) => {
panel.addEventListener('click', function(){
closePanels();
openPanel(this);
});
});
通过这种方式,我们将各个工作单元与特定的复杂任务分开。