Utilize a function within styled-components

Question

Utilize a function within styled-components

I am looking to dynamically adjust the font size of a button based on the length of a passed-in prop. However, I can't use a dynamic width due to a custom animation applied to the component.

Here is my current code:

const checkLength = () => {
  if (props.text.length > 7) {
    return "15px";
  } else {
    return "17px";
  }
};

const MyButton = styled.button`
  font-size: 17px;
`

Although I attempted to incorporate the function into the styling like this, it does not recognize the function:

const MyButton = styled.button`
  font-size: checkLength();
`

css reactjs styled-components

Answer 1

Answer №1

Appreciate the code example provided. It is important for the checkLength function to be within reach of MyButton. When passing functions to styled component template literals, you can access all props passed to the component upon rendering. Below is an enhanced version of your code with two instances of MyButton:

const App = () => {
  return (
    <div>
      <MyButton text="hello">
        <span>hello</span>
      </MyButton>
      <MyButton text="yar">
        <span>yar</span>
      </MyButton>
    </div>
  )  
}
  
const checkLength = (props) => {
  if (props.text.length > 4) {
    return '20px';
  } else {
    return '24px';
  }
}

const MyButton = styled.button`
  font-size: ${checkLength};
`

ReactDOM.render(<App />, document.getElementById('app'));

Answer 2

Appreciate the code example provided. It is important for the checkLength function to be within reach of MyButton. When passing functions to styled component template literals, you can access all props passed to the component upon rendering. Below is an enhanced version of your code with two instances of MyButton:

const App = () => {
  return (
    <div>
      <MyButton text="hello">
        <span>hello</span>
      </MyButton>
      <MyButton text="yar">
        <span>yar</span>
      </MyButton>
    </div>
  )  
}
  
const checkLength = (props) => {
  if (props.text.length > 4) {
    return '20px';
  } else {
    return '24px';
  }
}

const MyButton = styled.button`
  font-size: ${checkLength};
`

ReactDOM.render(<App />, document.getElementById('app'));

Answer 3

Answer №2

To include code within template literals, you can utilize the dollar sign and brackets: ${}. Simply wrap the checkLength function with them, without the need to call it:

const MyButton = styled.button`
  font-size: ${checkLength};
`

An alternative way to write this is:

const MyButton = styled.button`
  font-size: ${props => checkLength(props)};
`

For more information on this syntax, visit here

Answer 4

To include code within template literals, you can utilize the dollar sign and brackets: ${}. Simply wrap the checkLength function with them, without the need to call it:

const MyButton = styled.button`
  font-size: ${checkLength};
`

An alternative way to write this is:

const MyButton = styled.button`
  font-size: ${props => checkLength(props)};
`

For more information on this syntax, visit here

Utilize a function within styled-components

Answer №1

Answer №2

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