change background-colour of clicked button in react:js

Question

i have some buttons when ever i click on a button i want it heighlighted by changing the background colur of the button until any other button is cliked

function clickedtime(e) {
   var time = e.target.value;
   settime(time);
  
 }

<TabPanel className="tabcss" style={styles.tabpannel}>
                 <button
                   onClick={clickedtime}
                   value="9:00am"
                   style={styles.button}
                 >
                   9:00am
                 </button>
                 <button
                   onClick={clickedtime}
                   value="9:30am"
                   style={styles.button}
                 >
                   9:30am
                 </button>

                ....


               </TabPanel>

Answer 1

Use event handler and useState for setting color onClick like this

const[btn,setBtn]=useState([0,0]);//mean two button

const[sel,setSel]=useState(0);//mean 0 button is selected by default
function clickedtime(e,index) {
var time = e.target.value;
 settime(time);
 setSel(index)//selected btn is 0in this case
}

now for your tab panel change style to style={{backgroundColor:col}} aslo change tabpanel styling like i mention

<TabPanel className="tabcss" style={styles.tabpannel}>
           btn.map((item,index)=>{
           sel==index?

           <button
               onClick={(index)=>{clickedtime(index)}}
               value="9:00am"
               style={{backgroundColor:"red"}}
             >
               9:00am
             </button>
           :
             <button
               onClick={clickedtime}
               value="9:00am"
               style={{backgroundColor:"white"}}
             >
               9:00am
             </button>
             


             }  
            ....


           </TabPanel>

Answer 2

You can add all buttons to a class, add event listener to them and then have another class called "clicked" attached to them when the click event is fired.

 var buttons = document.getElementsByClassName("time-button"); var click_listener = function(event) { //console.log("clicked " + event.target); for (var i = 0; i < buttons.length; i++) { buttons[i].classList.remove("clicked"); } event.target.classList.add("clicked"); }; for (var i = 0; i < buttons.length; i++) { buttons[i].addEventListener("click", click_listener, false); }

 .clicked { background-color: orange; }

 <button class="time-button">9:30 am</button> <button class="time-button">9:00 am</button> <button class="time-button">8:30 am</button> <button class="time-button">8:00 am</button>