Key

Description: The key property can be defined in the option Object.

Edit
ctr('.test > div', {
width: 200px
attribute: {
option: {
key: '[class*="te"]'
}
font-size: 1.5em
}
})
.test > div:
width: 200px
attribute:
option:
key: '[class*="te"]'
font-size: 1.5em
.test > div {
width: 200px;
}
.test > div[class*="te"] {
font-size: 1.5em;
}
ctr('.test > div', {
  width: 200px
  attribute: {
    option: {
      key: '[class*="te"]'
    }
    font-size: 1.5em
  }
})
.test > div {
  width: 200px;
}
.test > div[class*="te"] {
  font-size: 1.5em;
}
.test > div:
  width: 200px
  attribute:
    option:
      key: '[class*="te"]'
    font-size: 1.5em

Attribute Value

Description: The attribute value can be defined through the value property in the option Object.

Edit
ctr('.test > div', {
width: 200px
attribute: {
option: {
key: 'class*'
value: 'te'
}
font-size: 2em
}
})
.test > div:
width: 200px
attribute:
option:
key: class*
value: te
font-size: 2em
.test > div {
width: 200px;
}
.test > div[class*="te"] {
font-size: 2em;
}
ctr('.test > div', {
  width: 200px
  attribute: {
    option: {
      key: 'class*'
      value: 'te'
    }
    font-size: 2em
  }
})
.test > div {
  width: 200px;
}
.test > div[class*="te"] {
  font-size: 2em;
}
.test > div:
  width: 200px
  attribute:
    option:
      key: class*
      value: te
    font-size: 2em

Notes