use*_*401 1 javascript material-design material-components mdc-components material-components-web
我们正在使用 MDC 菜单组件。我正在寻找一种在单击菜单中的第一项时不关闭菜单的方法。
我尝试将一个类应用于 mdc-list-item 并将光标指定为自动，但它不起作用。
.menu-do-not-close {
cursor: auto !important;
}
下面是示例小提琴
https://jsfiddle.net/phani25485/Lt6q2gxa/2/
您能否就如何实现这一目标提供一些指导。
您可以从一个特定的项目是通过调用选择后关闭停止菜单event.stopPropagation()上mdc-list-item单击事件时，活动对象都分配一个特定的类。您将需要添加一些额外的代码来处理列表项单击事件，因为这会阻止正常的MDC 菜单单击处理。
const menu = mdc.menu.MDCMenu.attachTo(document.querySelector('.mdc-menu'));
document.querySelector('.mdc-button').addEventListener('click', () => {
menu.open = !menu.open;
});
//Prevent menu close when option with 'prevent-menu-close' class clicked
const options = document.querySelectorAll('.mdc-list-item');
for (let option of options) {
option.addEventListener('click', (event) => {
let prevent = event.currentTarget.classList.contains('prevent-menu-close');
if (prevent) {
event.stopPropagation();
// handle 'prevent-menu-close' list item click event
}
});
}<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Material Select Field</title>
<link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,400,500,700">
<link href="https://unpkg.com/material-components-web@latest/dist/material-components-web.min.css" rel="stylesheet">
<script src="https://unpkg.com/material-components-web@latest/dist/material-components-web.min.js"></script>
</head>
<body>
<div class="mdc-menu-surface--anchor">
<button class="mdc-button">
<span class="mdc-button__label">Open Menu</span>
</button>
<div class="mdc-menu mdc-menu-surface">
<ul class="mdc-list" role="menu" aria-hidden="true" aria-orientation="vertical" tabindex="-1">
<li class="mdc-list-item prevent-menu-close" role="menuitem">
<span class="mdc-list-item__text">Prevent Close</span>
</li>
<li class="mdc-list-item" role="menuitem">
<span class="mdc-list-item__text">Another Menu Item</span>
</li>
</ul>
</div>
</div>
</body>
</html>