<div id="app">
  <div class="header">
    <h2>property: <code>{{key}}</code></h2>
    <div class="operation-area"></div>
  </div>

  <div class="container"> 
    <div class="content-container">
      
    <div class="subcontainer" style="margin-top: 20px"> 
      <div class="flex-container">
        <div
          v-for="(item, idx) in styles"
          class="flex-item"
          :style="item"
          v-html="formatStyles(item)"
        ></div> 
      </div>

      <div class="flex-container" style="flex-direction: column">
         <div
          v-for="(item, idx) in styles"
          class="flex-item"
          :style="item"
          v-html="formatStyles(item)"
        ></div> 
      </div>
    </div>
    </div>
  </div>
</div>

@default-color: fade(#1f2d3d, 70%);

@container-width: 1000px;
@flex-container-width: 520px;
@flex-container-height: auto;
@flex-container-padding: 0;

@flex-item-size: 150px;
@flex-item-margin: 12px;
@flex-item-font-size: 18px;

// @flex-item-height-1: 30px;
// @flex-item-height-2: 80px;
// @flex-item-height-3: 50px;
// @flex-item-height-4: 140px;
// @flex-item-height-5: 80px;

body {
  margin: 0;
}

button {
  display: flex;
  align-items: center;
  height: 32px;
  padding: 0 15px;
  color: rgb(17, 85, 204);
  border-radius: 500px;
  bottom: 16px;
  cursor: pointer;
  justify-content: center;
  min-width: 32px;
  background-color: rgb(255, 255, 255);
  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.16), 0 1px 2px rgba(0, 0, 0, 0.23);

  + button {
    margin-left: 12px;
  }
}

#app {
  overflow: auto;
}

.flex-layout {
  display: flex;
}

.container {
  overflow: auto;
  padding: 0 20px;
}

.content-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
  width: @container-width;
  margin: auto;
  text-align: center;
  color: @default-color;
}

.subcontainer {
  width: 100%;
}

.header {
  position: sticky;
  top: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  height: 60px;
  padding: 0 20px;
  box-shadow: 0 1px 5px rgba(0, 0, 0, 0.2);
  background: #fff;
  box-sizing: border-box;
}

.flex-container {
  display: flex;
  flex-wrap: wrap;
  width: 100%;
  height: @flex-container-height;
  padding: @flex-container-padding;
  margin: auto;
  background: fade(#3a506b, 70%);

  & + & {
    margin-top: 20px;
  }
}

.flex-item {
  display: flex;
  justify-content: center;
  align-items: center;
  height: @flex-item-size;
  // width: @flex-item-size;
  margin: @flex-item-margin;
  font-size: @flex-item-font-size;

  &:nth-child(5n + 1) {
    background: #247ba0;
    color: fade(#fff, 70%);
  }
  &:nth-child(5n + 2) {
    background: #70c1b3;
  }
  &:nth-child(5n + 3) {
    background: #b2dbbf;
  }
  &:nth-child(5n + 4) {
    background: #f3ffbd;
  }
  &:nth-child(5n + 5) {
    background: #ff1654;
    color: fade(#fff, 70%);
  }
}

.line {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 50px auto 20px;
  width: @container-width;

  &:before {
    content: "";
    position: absolute;
    border-top: 2px solid @default-color;
    left: 0;
    right: 0;
    top: 16px;
    margin: auto;
    border-radius: 10px;
  }

  &-content {
    position: relative;
    display: inline;
    padding: 0 16px;
    background: #fff;
    font-size: 24px;
  }
}

.tips {
  text-align: left;
  margin: 30px 0;
  padding: 10px;
  border: 1px solid #ccc;
}

const defaultWidth = 150;
const styles = [
  `width: ${defaultWidth}px`,
  `width: ${defaultWidth}px; flex-basis: 200px`,
  "width: auto",
  `width: ${defaultWidth}px; flex-basis: auto`,
  `width: ${defaultWidth}px; flex-basis: 0`,
  `width: auto; flex-basis: 0`,

]
const property = 'flex-basis';

new Vue({
   el: '#app',
   data: {
      key: property,
      styles
  },
  methods: {
    formatStyles(styles) {
     return styles.split(';')
       .map(item => {
        return `<code>${item};<code/>`
      }).join('<br />')
    }
  }
})