Question 364023 in Javascript Question posted in
A very good W3school tutorial can be found here.

Javascript – I want to show another second tag on the click of first anchor tag and hide the first anchor tag

I have five anchor tags. I want to display second anchor tag on click of first anchor tag and hide it self and further when click on second anchor tag show third anchor tag and hide itself and so on.

<a href="javascript:void(0)" id="btn0" onclick='showBtn1()'  class="w-auto rounded-pill bg-transparent border px-3 py-2 text-decoration-none text-reset suggestion"><?php print(strval($suggestions[0])); ?></a>
                    <a href="javascript:void(0)" id="btn1"  style="display:none" class="w-auto rounded-pill bg-transparent border px-3 py-2 text-decoration-none text-reset suggestion"><?php print(strval($suggestions[1])); ?></a>
                    <a href="javascript:void(0)" id="btn2"  style="display:none" class="w-auto rounded-pill bg-transparent border px-3 py-2 text-decoration-none text-reset suggestion"><?php print(strval($suggestions[2])); ?></a>
                    <a href="javascript:void(0)" id="btn3"  style="display:none" class="w-auto rounded-pill bg-transparent border px-3 py-2 text-decoration-none text-reset suggestion"><?php print(strval($suggestions[3])); ?></a>
                    <a href="javascript:void(0)" id="btn4"  style="display:none" class="w-auto rounded-pill bg-transparent border px-3 py-2 text-decoration-none text-reset suggestion"><?php print(strval($suggestions[4])); ?></a>
                   

<script>
function showBtn1()
    {
        var btn0 = document.getElementById('btn0');
        var btn1 = document.getElementById('btn1');
        var btn2 = document.getElementById('btn2');
        var btn3 = document.getElementById('btn3');
        var btn4 = document.getElementById('btn4');

        if(btn1.style.display == 'none')
        {
            btn1.style.display = 'initial';
            btn0.style.display = 'none';
            btn2.style.display = 'none';
            btn3.style.display = 'none';
            btn4.style.display = 'none';
        }
        else
        {
            btn1.style.display = 'none';
            btn0.style.display = 'none';
            btn2.style.display = 'none';
            btn3.style.display = 'none';
            btn4.style.display = 'none';
        }
   }
</script>
Tags:

2

Answers


  1. 0

    Here you go:

    <script>
   function showBtn(ix) {
        for (let i = 0; i < 5; i++) {
            document.getElementById('btn' + i).style.display = 'none';
        }
        document.getElementById('btn' + ix).style.display = 'initial';
   }
</script>

    In the buttons use onclick='showBtn(1 up to 5)'

    Have fun learning. Read a little about coding principles.

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  2. 0

    You don’t need to use ID attributes and weird concatenation to accomplish your stated goal. You could bind a single event listener to the parent element that contains the a elements and use the event.target property to identify which a element invoked the event handler and find that elements index within the nodelist. With that index value you can use simple arithmetic to find the next element or reset index to beginning. The following has, as the original, 5 hyperlinks but could be scaled to any number without modification.

    const d=document;
const cn='active';
const parent=d.querySelector('#parent');

// Find all "a" elements and convert nodelist to Array
// Below uses the "spread syntax" ( or "Splat" operator )
const col=[...parent.querySelectorAll('a')];

// Delegated event listener bound to a suitable Parent element
parent.addEventListener('click',e=>{
  e.preventDefault();
  
  // ensure all elements are hidden
  col.forEach(a=>a.classList.remove(cn));
  
  // Where is this "a" in the array?
  let i=col.indexOf( e.target );
  
  // increment index to find next "a" element
  i++;
  
  // reset index if we exceed array length
  if( i >= col.length )i=0;
  
  // show the next element
  col[i].classList.add(cn);
});
    #parent a{display:none}
#parent .active{display:block!important}
    <div id='parent'>
  <a href='#' class="active w-auto rounded-pill bg-transparent border px-3 py-2 text-decoration-none text-reset suggestion">link #1</a>
  <a href='#' class="w-auto rounded-pill bg-transparent border px-3 py-2 text-decoration-none text-reset suggestion">link #2</a>
  <a href='#' class="w-auto rounded-pill bg-transparent border px-3 py-2 text-decoration-none text-reset suggestion">link #3</a>
  <a href='#' class="w-auto rounded-pill bg-transparent border px-3 py-2 text-decoration-none text-reset suggestion">link #4</a>
  <a href='#' class="w-auto rounded-pill bg-transparent border px-3 py-2 text-decoration-none text-reset suggestion">link #5</a>
</div>
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