freeCodeCamp/curriculum/challenges/english/01-responsive-web-design/css-flexbox/use-the-flex-basis-property-to-set-the-initial-size-of-an-item.md

id, title, challengeType, videoUrl, forumTopicId

id	title	challengeType	videoUrl	forumTopicId
587d78ae367417b2b2512afd	Use the flex-basis Property to Set the Initial Size of an Item	0	https://scrimba.com/p/pVaDAv/c3d9nCa	301108

Description

The flex-basis property specifies the initial size of the item before CSS makes adjustments with flex-shrink or flex-grow. The units used by the flex-basis property are the same as other size properties (px, em, %, etc.). The value auto sizes items based on the content.

Instructions

Set the initial size of the boxes using flex-basis. Add the CSS property flex-basis to both #box-1 and #box-2. Give #box-1 a value of 10em and #box-2 a value of 20em.

Tests

tests:
  - text: The <code>#box-1</code> element should have a <code>flex-basis</code> property.
    testString: assert($('#box-1').css('flex-basis') != 'auto');
  - text: The <code>#box-1</code> element should have a <code>flex-basis</code> value of <code>10em</code>.
    testString: assert(code.match(/#box-1\s*?{\s*?.*?\s*?.*?\s*?flex-basis:\s*?10em;/g));
  - text: The <code>#box-2</code> element should have the <code>flex-basis</code> property.
    testString: assert($('#box-2').css('flex-basis') != 'auto');
  - text: The <code>#box-2</code> element should have a <code>flex-basis</code> value of <code>20em</code>.
    testString: assert(code.match(/#box-2\s*?{\s*?.*?\s*?.*?\s*?flex-basis:\s*?20em;/g));

Challenge Seed

<style>
  #box-container {
    display: flex;
    height: 500px;
  }

  #box-1 {
    background-color: dodgerblue;
    height: 200px;

  }

  #box-2 {
    background-color: orangered;
    height: 200px;

  }
</style>

<div id="box-container">
  <div id="box-1"></div>
  <div id="box-2"></div>
</div>

Solution

<style>
  #box-container {
    display: flex;
    height: 500px;
  }

  #box-1 {
    background-color: dodgerblue;
    height: 200px;
    flex-basis: 10em;
  }

  #box-2 {
    background-color: orangered;
    height: 200px;
    flex-basis: 20em;
  }
</style>

<div id="box-container">
  <div id="box-1"></div>
  <div id="box-2"></div>
</div>