如何在单击 select 选项时更改显示类别

Question

<div class="crypto-opt-container mt-md-5">
  <label">Which Crypto would you like to Deposit with?</label>
  <div class="dropdown w-100">
    <select class="form-select p-2 deposit-dropdown" aria-label="Default select example">
      <option selected>Choose Crypto Option:</option>
      <option value="1">Bitcoin</option>
      <option value="2">Ethereum</option>
      <option value="3">USDT</option>
    </select>
  </div>
</div>

<div class="depo-add-container mt-md-5">
  <label>Deposit Address:</label>
  <div class="d-flex flex-row justify-content-between">
    <p class="mb-0 me-1 py-2 ps-4 add-text1" id="p1"> ygwbfewilskfhnewisfklnewiofjfhjky </p>
    <p class="mb-0 me-1 py-2 ps-4 add-text2" id="p2"> ygwbfewilskfhnewisfklnewiofjfhrrt </p>
    <p class="mb-0 me-1 py-2 ps-4 add-text3" id="p3"> ygwbfewilskfhnewisfklnewiofewfygi </p>                                
    <button class="btn-primary w-20 px-3 copy-btn" onclick="copyToClipboard('#p1')">
      Copy
      <i class="fa-regular fa-copy ps-2"></i>
    </button>
  </div>
</div>

.add-text2, .add-text3{
   display: none;
}

EXPLANATION:

I want the p.add-text(1,2 and 3) to toggle display from none to block according to which option the user clicks such that if <option value="1">Bitcoin</option> is clicked then this <p class="mb-0 me-1 py-2 ps-4 add-text1" id="p1">ygwbfewilskfhnewisfklnewiofjfhjky</p> will be display: block and so on.

In essence, option values= "1,2,3" should only display p.add-text1,2,3 respectively.

Javascript only answers please!!!

Answer 1

This will surely help you:)

 let value = 0; let selectBtn = document.querySelector('select'); let p1 = document.querySelector('#p1'); let p2 = document.querySelector('#p2'); let p3 = document.querySelector('#p3'); selectBtn.addEventListener('change', () => { if (selectBtn.value == 1) { p1.classList.remove('add-text1'); p2.classList.add('add-text2'); p3.classList.add('add-text3'); } else if (selectBtn.value == 2) { p1.classList.add('add-text1'); p2.classList.remove('add-text2'); p3.classList.add('add-text3'); } else if ( selectBtn.value == 3 ) { p1.classList.add('add-text1'); p2.classList.add('add-text2'); p3.classList.remove('add-text3'); } })

 .add-text1, .add-text2, .add-text3{ display: none; }

 <div class="crypto-opt-container mt-md-5"> <label">Which Crypto would you like to Deposit with?</label> <div class="dropdown w-100"> <select class="form-select p-2 deposit-dropdown" aria-label="Default select example"> <option selected>Choose Crypto Option:</option> <option value="1">Bitcoin</option> <option value="2">Ethereum</option> <option value="3">USDT</option> </select> </div> </div> <div class="depo-add-container mt-md-5"> <label>Deposit Address:</label> <div class="d-flex flex-row justify-content-between"> <p class="mb-0 me-1 py-2 ps-4 add-text1" id="p1">ygwbfewilskfhnewisfklnewiofjfhjky</p> <p class="mb-0 me-1 py-2 ps-4 add-text2" id="p2">ygwbfewilskfhnewisfklnewiofjfhrrt</p> <p class="mb-0 me-1 py-2 ps-4 add-text3" id="p3">ygwbfewilskfhnewisfklnewiofewfygi</p> <button class="btn-primary w-20 px-3 copy-btn" onclick="copyToClipboard('#p1')">Copy<i class="fa-regular fa-copy ps-2"></i></button> </div> </div>

Answer 2

you need to use onchange event with javascript, something like this:

function change(selected) {
  document.querySelector('p.add-text' + selected.value).display = 'block'
}

and in html add to select onchange="change(this)" or add eventlistener with js

Answer 3

This way...

 const mySelect = document.querySelector('select[name="mySelect"]'), p1_p2_p3 = document.querySelectorAll('#p1,#p2,#p3'); set_p1_p2_p3_on_mySelect() // on init page mySelect.onchange = set_p1_p2_p3_on_mySelect // for every change function set_p1_p2_p3_on_mySelect() { let sel_id = 'p' + mySelect.value p1_p2_p3.forEach( p => p.classList.toggle('noDisplay', p.id !== sel_id )) }

 .noDisplay { display: none; }

 <select name="mySelect" > <option selected>Choose Crypto Option:</option> <option value="1">Bitcoin</option> <option value="2">Ethereum</option> <option value="3">USDT</option> </select> <div> <p id="p1"> ygwbfewilskfhnewisfklnewiofjfhjky Bitcoin</p> <p id="p2"> ygwbfewilskfhnewisfklnewiofjfhrrt Ethereum </p> <p id="p3"> ygwbfewilskfhnewisfklnewiofewfygi USDT </p> </div>