2018-10-10 18:03:03 -04:00
|
|
|
|
---
|
|
|
|
|
id: 587d7fad367417b2b2512be1
|
|
|
|
|
title: Handle Click Events with JavaScript using the onclick property
|
|
|
|
|
challengeType: 6
|
|
|
|
|
videoUrl: ''
|
|
|
|
|
localeTitle: 使用onclick属性处理使用JavaScript单击事件
|
|
|
|
|
---
|
|
|
|
|
|
|
|
|
|
## Description
|
|
|
|
|
<section id="description">您希望代码仅在页面加载完成后执行。为此,您可以将JavaScript事件附加到名为<code>DOMContentLoaded</code>的文档中。这是执行此操作的代码: <blockquote> document.addEventListener('DOMContentLoaded',function(){ <br><br> }); </blockquote>您可以实现<code>DOMContentLoaded</code>函数内部的事件处理程序。您可以通过添加以下代码来实现<code>onclick</code>事件处理程序,该处理程序在用户单击id为<code>getMessage</code>的元素时触发: <blockquote> 。的document.getElementById( '的getMessage')的onclick =函数(){}; </blockquote></section>
|
|
|
|
|
|
|
|
|
|
## Instructions
|
|
|
|
|
<section id="instructions">在<code>DOMContentLoaded</code>函数内为id为<code>getMessage</code>的元素添加一个click事件处理程序。 </section>
|
|
|
|
|
|
|
|
|
|
## Tests
|
|
|
|
|
<section id='tests'>
|
|
|
|
|
|
|
|
|
|
```yml
|
|
|
|
|
tests:
|
|
|
|
|
- text: 您的代码应使用<code>document.getElementById</code>方法来选择<code>getMessage</code>元素。
|
2020-02-18 01:40:55 +09:00
|
|
|
|
testString: assert(code.match(/document\s*\.getElementById\(\s*?('|")getMessage\1\s*?\)/g));
|
2018-10-10 18:03:03 -04:00
|
|
|
|
- text: 您的代码应添加<code>onclick</code>事件处理程序。
|
2020-02-18 01:40:55 +09:00
|
|
|
|
testString: assert(typeof document.getElementById('getMessage').onclick === 'function');
|
2018-10-10 18:03:03 -04:00
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
</section>
|
|
|
|
|
|
|
|
|
|
## Challenge Seed
|
|
|
|
|
<section id='challengeSeed'>
|
|
|
|
|
|
|
|
|
|
<div id='html-seed'>
|
|
|
|
|
|
|
|
|
|
```html
|
|
|
|
|
<script>
|
|
|
|
|
document.addEventListener('DOMContentLoaded',function(){
|
|
|
|
|
// Add your code below this line
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// Add your code above this line
|
|
|
|
|
});
|
|
|
|
|
</script>
|
|
|
|
|
<style>
|
|
|
|
|
body {
|
|
|
|
|
text-align: center;
|
|
|
|
|
font-family: "Helvetica", sans-serif;
|
|
|
|
|
}
|
|
|
|
|
h1 {
|
|
|
|
|
font-size: 2em;
|
|
|
|
|
font-weight: bold;
|
|
|
|
|
}
|
|
|
|
|
.box {
|
|
|
|
|
border-radius: 5px;
|
|
|
|
|
background-color: #eee;
|
|
|
|
|
padding: 20px 5px;
|
|
|
|
|
}
|
|
|
|
|
button {
|
|
|
|
|
color: white;
|
|
|
|
|
background-color: #4791d0;
|
|
|
|
|
border-radius: 5px;
|
|
|
|
|
border: 1px solid #4791d0;
|
|
|
|
|
padding: 5px 10px 8px 10px;
|
|
|
|
|
}
|
|
|
|
|
button:hover {
|
|
|
|
|
background-color: #0F5897;
|
|
|
|
|
border: 1px solid #0F5897;
|
|
|
|
|
}
|
|
|
|
|
</style>
|
|
|
|
|
<h1>Cat Photo Finder</h1>
|
2019-02-24 20:38:10 +05:30
|
|
|
|
<p class="message">
|
2018-10-10 18:03:03 -04:00
|
|
|
|
The message will go here
|
|
|
|
|
</p>
|
|
|
|
|
<p>
|
|
|
|
|
<button id="getMessage">
|
|
|
|
|
Get Message
|
|
|
|
|
</button>
|
|
|
|
|
</p>
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
</div>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
</section>
|
|
|
|
|
|
|
|
|
|
## Solution
|
|
|
|
|
<section id='solution'>
|
|
|
|
|
|
|
|
|
|
```js
|
|
|
|
|
// solution required
|
|
|
|
|
```
|
2020-08-13 17:24:35 +02:00
|
|
|
|
|
|
|
|
|
/section>
|