Html - Creating a Button with JavaScript

Lohr027
October 28, 2023
140 views
1 vote
2 Answers

I’m currently learning JavaScript. I’ve been attempting to create a navbar button that opens the menu when clicked. After multiple attempts and changes to the code, I didn’t solve the problem.

HTML

        <nav class="nav">
            <div class="logo">AdoptaPet</div>
            <button id="navBtn"><i class="bi bi-list abrirNav"></i></button>
            <ul id="abrirMenu" class="nav-links">
                <i class="bi bi-x fecharNav"></i>
                <li><a href="">Home</a></li>
                <li><a href="">Sobre Nós</a></li>
                <li><a href="">Loja</a></li>
                <li><a href="">Cães para Adoção</a></li>
                <li><a href="">Detalhes do Cão</a></li>
                <li><a href="">Adotar</a></li>
                <li><a href="">Favoritos</a></li>
                <li><a href="">Contactos</a></li>
            </ul>
        </nav>

CSS

    .nav .nav-links{
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        background-color: #ffcc05;
        flex-direction: column;
        height: 100%;
        max-width: 280px;
        width: 100%;
        padding-top: 100px;
        row-gap: 25px;
        transition: all 0.4s linear;
    }
    /* Mostra o menu ao clicar no botão */
    .navAberta{
        display: inherit;
    }

document.getElementById("navBtn").onclick = function() {abrirNav()};

function abrirNav() {
    document.getElementByID("abrirMenu").classList.toggle("navAberta");
  }

The objective would be to open the <ul> when clicking the button at the top right of the image.

Navbar

I appreciate anyone who tries to help,
Best regards.

Answers

Check for error messages in your console. When I run your code I get

Uncaught TypeError: document.getElementByID is not a function

That D shouldn’t be capitalized.

The 2nd issue is that .nav .nav-links has higher precedence than .navAberta so that display: inherit is never applied. You can also see this in dev tools:

It’s crossed out.

You can add a 2nd class to make them the same specificity, or remove one of the classes from the other element.

document.getElementById("navBtn").onclick = function() {
  abrirNav()
};

function abrirNav() {
  document.getElementById("abrirMenu").classList.toggle("navAberta");
}

.nav .nav-links {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  background-color: #ffcc05;
  flex-direction: column;
  height: 100%;
  max-width: 280px;
  width: 100%;
  padding-top: 100px;
  row-gap: 25px;
  transition: all 0.4s linear;
}


/* Mostra o menu ao clicar no botão */

.nav .navAberta {
  display: inherit;
}

<nav class="nav">
  <div class="logo">AdoptaPet</div>
  <button id="navBtn">Btn</button>
  <ul id="abrirMenu" class="nav-links">
    <i class="bi bi-x fecharNav"></i>
    <li><a href="">Home</a></li>
    <li><a href="">Sobre Nós</a></li>
    <li><a href="">Loja</a></li>
    <li><a href="">Cães para Adoção</a></li>
    <li><a href="">Detalhes do Cão</a></li>
    <li><a href="">Adotar</a></li>
    <li><a href="">Favoritos</a></li>
    <li><a href="">Contactos</a></li>
  </ul>
</nav>

The javascript is incorrect. You would have to define the onclick attribute in html.

Here is the updated code:

function abrirNav() {  document.getElementById("abrirMenu").classList.toggle("navAberta");
}

.nav .nav-links {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  background-color: #ffcc05;
  flex-direction: column;
  height: 100%;
  max-width: 280px;
  width: 100%;
  padding-top: 100px;
  row-gap: 25px;
  transition: all 0.4s linear;
}


/* Mostra o menu ao clicar no botão */

.nav .navAberta {
  display: inherit;
}

<nav class="nav">
  <div class="logo">AdoptaPet</div>
  <button id="navBtn" onclick="abrirNav()">Btn</button>
  <ul id="abrirMenu" class="nav-links">
    <i class="bi bi-x fecharNav"></i>
    <li><a href="">Home</a></li>
    <li><a href="">Sobre Nós</a></li>
    <li><a href="">Loja</a></li>
    <li><a href="">Cães para Adoção</a></li>
    <li><a href="">Detalhes do Cão</a></li>
    <li><a href="">Adotar</a></li>
    <li><a href="">Favoritos</a></li>
    <li><a href="">Contactos</a></li>
  </ul>
</nav>

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Html – Creating a Button with JavaScript

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