我正在创建一个菜单,当我滚动时,它会改变颜色,当我运行应用程序时,脚本不会运行,我是 Angular 的新手,我不知道我是否做错了。
我的html索引代码:
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Solticom</title>
<base href="/">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="icon" type="image/x-icon" href="favicon.ico">
<link href="https://unpkg.com/[email protected]/dist/aos.css" rel="stylesheet">
</head>
<body>
<app-root></app-root>
<script src="https://unpkg.com/@popperjs/core@2"></script>
<script>
const navEl = document.querySelector('.navbar');
window.addEventListener ('scroll' , () => {
if (window.scrollY > 56) {
navEl.classList.add('navbar-scrolled');
} else if (window.scrollY <= 56) {
navEl.classList.remove('navbar-scrolled');
}
});
</script>
</body>
</html>
我的 html 菜单代码:
<nav class="navbar navbar-expand-lg navbar-light fixed-top bg">
<div class="container">
<a class="navbar-brand" href="#">
<img src="assets/images/logo_sol_v1.png" width="310" height="auto" class="d-inline-block align-top img-fluid" alt="">
</a>
<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNavDropdown" aria-controls="navbarNavDropdown" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse justify-content-center" id="navbarNavDropdown">
<ul class="navbar-nav ">
<li class="nav-item">
<a class="nav-link active" aria-current="page" [routerLink]="['/home']" >Inicio </a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown" aria-expanded="false">
Servicios
</a>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">Action</a></li>
<li><a class="dropdown-item" href="#">Another action</a></li>
<li><a class="dropdown-item" href="#">Something else here</a></li>
</ul>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown" aria-expanded="false">
Experiencia Laboral
</a>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">Proyectos relevantes</a></li>
<li><a class="dropdown-item" href="#">Certificaciones</a></li>
<li><a class="dropdown-item" href="#">Galería</a></li>
</ul>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Distribuidores</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Contacto</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Mesa de ayuda</a>
</li>
</ul>
</div>
</div>
</nav>
我通过另一个我之前已经使用过的脚本意识到,我也没有运行AOS库,但通过研究我能够解决它。
正如 browsermator 所写,不要将对 Angular 组件的 DOM 操作放在索引 html 文件中。那属于组件。当您致电时请考虑这一点:
const navEl = document.querySelector('.navbar');
浏览器只能看到这个
<app-root></app-root>
组件的实际内容尚未渲染,因此没有导航栏类的元素可供选择。如果您在组件内部(最好是在 OnInit 中)进行操作,Angular 将有时间实际创建您要定位的 DOM 元素。