--description--

There is a shortcut available to set several flex properties at once. The flex-grow, flex-shrink, and flex-basis properties can all be set together by using the flex property.

For example, flex: 1 0 10px; will set the item to flex-grow: 1;, flex-shrink: 0;, and flex-basis: 10px;.

The default property settings are flex: 0 1 auto;.

--instructions--

Add the CSS property flex to both #box-1 and #box-2. Give #box-1 the values so its flex-grow is 2, its flex-shrink is 2, and its flex-basis is 150px. Give #box-2 the values so its flex-grow is 1, its flex-shrink is 1, and its flex-basis is 150px.

These values will cause #box-1 to grow to fill the extra space at twice the rate of #box-2 when the container is greater than 300px and shrink at twice the rate of #box-2 when the container is less than 300px. 300px is the combined size of the flex-basis values of the two boxes.

--hints--

The #box-1 element should have the flex property set to a value of 2 2 150px.

assert(
  $('#box-1').css('flex-grow') == '2' &&
    $('#box-1').css('flex-shrink') == '2' &&
    $('#box-1').css('flex-basis') == '150px'
);

The #box-2 element should have the flex property set to a value of 1 1 150px.

assert(
  $('#box-2').css('flex-grow') == '1' &&
    $('#box-2').css('flex-shrink') == '1' &&
    $('#box-2').css('flex-basis') == '150px'
);

Your code should use the flex property for #box-1 and #box-2.

assert(code.match(/flex:\s*?\d\s+?\d\s+?150px;/g).length == 2);

--seed--

--seed-contents--

<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>

--solutions--

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

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

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