如何根据浏览器位置路径名应用不同的样式？

Question

const activeStyle = {
  border: '1px solid transparent',
  borderColor: '#e4e6e8', 
  borderBottomColor: '#fff', 
  marginBottom: '-1px',
  cursor: 'default'
}

const notActive = {
  cursor: 'pointer'
}

class LoginSignup extends React.Component {
  render() {
    const pathName = this.props.history.location.pathname;
    return (
        <div style={{ pathName === '/login' ? ...activeStyle : ...notActive  }}>
           <Link to='/login'><span>Log in</span></Link>
         </div>
         <div style={{ pathName === '/signup' ? ...activeStyle : ...notActive  }}>
            <Link to='/signup'><span>Sign up</span></Link>
           </div>
      </div>
    );
  }
}


export default withRouter(LoginSignup);

I want to apply different styles based on the location path name. How to do that? I tried ternary operator inside style attribute but it shows Unexpted token, expected , error.

Answer 1

You will need to write it like so:

<div style={pathName === '/login' ? activeStyle : notActive}>...</div>

If you need to concat some styles, I would do something along the lines:

<div style={pathName === '/login' ? activeStyle : { ...activeStyle, ...notActive}}>...</div>

For readability, maybe rename the activeStyle to defaultStyle .

Answer 2

  you can try the code like below.

     const pathName = this.props.history.location.pathname;
     let headerlink='';
     if(pathName=='/login'){
       headerlink=<div style={{...activeStyle }}>
               <Link to='/login'><span>Log in</span></Link>
             </div>
     }else{
      headerlink=<div style={{...notActive }}>
                <Link to='/signup'><span>Sign up</span></Link>
               </div>;
    }
    return headerlink;

Answer 3

Your spread operator is incorrect you need to spread it within object. One of the following two approaches will work.

class LoginSignup extends React.Component {
  render() {
    const pathName = this.props.history.location.pathname;
    return (
        <div style={{ pathName === '/login' ? activeStyle : notActive  }}>
           <Link to='/login'><span>Log in</span></Link>
         </div>
         <div style={{ pathName === '/signup' ? activeStyle : notActive  }}>
            <Link to='/signup'><span>Sign up</span></Link>
           </div>
      </div>
    );
  }
}

OR

class LoginSignup extends React.Component {
  render() {
    const pathName = this.props.history.location.pathname;
    return (
        <div style={{ pathName === '/login' ? {...activeStyle} : {...notActive}  }}>
           <Link to='/login'><span>Log in</span></Link>
         </div>
         <div style={{ pathName === '/signup' ? {...activeStyle} : {...notActive}  }}>
            <Link to='/signup'><span>Sign up</span></Link>
           </div>
      </div>
    );
  }
}