Use the flex Shorthand Property-BUG: Cannot read property 'length' of null

HTML-CSS
1

Tell us what’s happening:

Your code so far


<style>
  #box-container {
    display: flex;
    height: 500px;
  }
  #box-1 {
    background-color: dodgerblue;
    display: flex;
    flex-grow: 2;
    flex-shrink: 2;
    flex-basis: 150px;
    height: 200px;
  }

  #box-2 {
    background-color: orangered;
    display: flex;
    flex-grow: 1;
    flex-shrink: 1;
    flex-basis: 150px;
    height: 200px;
  }
</style>

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

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36.

Link to the challenge:
https://learn.freecodecamp.org/responsive-web-design/css-flexbox/use-the-flex-shorthand-property/

2

Read the instructions again.

You should use short-hand property instead of explicitly declaring them. For ex.

flex: 1 0 10px;

3

It’s work!!! Thanks for your help!