freeCodeCamp/curriculum/challenges/chinese/01-responsive-web-design/basic-html-and-html5/add-placeholder-text-to-a-text-field.chinese.md

id	title	challengeType	videoUrl	localeTitle
bad87fee1348bd9aedf08830	Add Placeholder Text to a Text Field	0		将占位符文本添加到文本字段

Description

占位符文本是在用户输入任何内容之前在input元素中显示的内容。您可以像这样创建占位符文本： <input type="text" placeholder="this is placeholder text">

Instructions

将文本input的placeholder值设置为“cat photo URL”。

Tests

tests:
  - text: 将<code>placeholder</code>属性添加到现有文本<code>input</code>元素。
    testString: 'assert($("input[placeholder]").length > 0, "Add a <code>placeholder</code> attribute to the existing text <code>input</code> element.");'
  - text: 将占位符属性的值设置为“cat photo URL”。
    testString: 'assert($("input") && $("input").attr("placeholder") && $("input").attr("placeholder").match(/cat\s+photo\s+URL/gi), "Set the value of your placeholder attribute to "cat photo URL".");'
  - text: 完成的<code>input</code>元素应该具有有效的语法。
    testString: 'assert($("input[type=text]").length > 0 && code.match(/<input((\s+\w+(\s*=\s*(?:".*?"|".*?"|[\^"">\s]+))?)+\s*|\s*)\/?>/gi), "The finished <code>input</code> element should have valid syntax.");'

Challenge Seed

<h2>CatPhotoApp</h2>
<main>
  <p>Click here to view more <a href="#">cat photos</a>.</p>

  <a href="#"><img src="https://bit.ly/fcc-relaxing-cat" alt="A cute orange cat lying on its back."></a>

  <p>Things cats love:</p>
  <ul>
    <li>cat nip</li>
    <li>laser pointers</li>
    <li>lasagna</li>
  </ul>
  <p>Top 3 things cats hate:</p>
  <ol>
    <li>flea treatment</li>
    <li>thunder</li>
    <li>other cats</li>
  </ol>
  <input type="text">
</main>

Solution

// solution required