>你好，我正在学习 vuejs 并将我的一个项目转换为 vuejs，我想知道我可以在方法中编写我的自定义函数并在挂载的钩子中调用它们，我想知道如何在 Vuejs 中使用侦听器。
我也可以通过在 Vue 项目中导入来使用我的 jQuery 吗
？vue 网站上的事件侦听器文档仅说明 v-on 和 click 示例，但没有示例适用于 Windows 侦听器
jQuery(document).ready(function(){
//cache DOM elements
var mainContent = $('.cd-main-content'),
header = $('.cd-main-header'),
sidebar = $('.cd-side-nav'),
sidebarTrigger = $('.cd-nav-trigger'),
topNavigation = $('.cd-top-nav'),
searchForm = $('.cd-search'),
accountInfo = $('.account');
//on resize, move search and top nav position according to window width
var resizing = false;
moveNavigation();
$(window).on('resize', function(){
if( !resizing ) {
(!window.requestAnimationFrame) ? setTimeout(moveNavigation, 300) : window.requestAnimationFrame(moveNavigation);
resizing = true;
}
});
//on window scrolling - fix sidebar nav
var scrolling = false;
checkScrollbarPosition();
$(window).on('scroll', function(){
if( !scrolling ) {
(!window.requestAnimationFrame) ? setTimeout(checkScrollbarPosition, 300) : window.requestAnimationFrame(checkScrollbarPosition);
scrolling = true;
}
});
//mobile only - open sidebar when user clicks the hamburger menu
sidebarTrigger.on('click', function(event){
event.preventDefault();
$([sidebar, sidebarTrigger]).toggleClass('nav-is-visible');
});
//click on item and show submenu
$('.has-children > a').on('click', function(event){
var mq = checkMQ(),
selectedItem = $(this);
if( mq == 'mobile' || mq == 'tablet' ) {
event.preventDefault();
if( selectedItem.parent('li').hasClass('selected')) {
selectedItem.parent('li').removeClass('selected');
} else {
sidebar.find('.has-children.selected').removeClass('selected');
accountInfo.removeClass('selected');
selectedItem.parent('li').addClass('selected');
}
}
});
//click on account and show submenu - desktop version only
accountInfo.children('a').on('click', function(event){
var mq = checkMQ(),
selectedItem = $(this);
if( mq == 'desktop') {
event.preventDefault();
accountInfo.toggleClass('selected');
sidebar.find('.has-children.selected').removeClass('selected');
}
});
$(document).on('click', function(event){
if( !$(event.target).is('.has-children a') ) {
sidebar.find('.has-children.selected').removeClass('selected');
accountInfo.removeClass('selected');
}
});
//on desktop - differentiate between a user trying to hover over a dropdown item vs trying to navigate into a submenu's contents
sidebar.children('ul').menuAim({
activate: function(row) {
$(row).addClass('hover');
},
deactivate: function(row) {
$(row).removeClass('hover');
},
exitMenu: function() {
sidebar.find('.hover').removeClass('hover');
return true;
},
submenuSelector: ".has-children",
});
function checkMQ() {
//check if mobile or desktop device
return window.getComputedStyle(document.querySelector('.cd-main-content'), '::before').getPropertyValue('content').replace(/'/g, "").replace(/"/g, "");
}
function moveNavigation(){
var mq = checkMQ();
if ( mq == 'mobile' && topNavigation.parents('.cd-side-nav').length == 0 ) {
detachElements();
topNavigation.appendTo(sidebar);
searchForm.removeClass('is-hidden').prependTo(sidebar);
} else if ( ( mq == 'tablet' || mq == 'desktop') && topNavigation.parents('.cd-side-nav').length > 0 ) {
detachElements();
searchForm.insertAfter(header.find('.cd-logo'));
topNavigation.appendTo(header.find('.cd-nav'));
}
checkSelected(mq);
resizing = false;
}
function detachElements() {
topNavigation.detach();
searchForm.detach();
}
function checkSelected(mq) {
//on desktop, remove selected class from items selected on mobile/tablet version
if( mq == 'desktop' ) $('.has-children.selected').removeClass('selected');
}
function checkScrollbarPosition() {
var mq = checkMQ();
if( mq != 'mobile' ) {
var sidebarHeight = sidebar.outerHeight(),
windowHeight = $(window).height(),
mainContentHeight = mainContent.outerHeight(),
scrollTop = $(window).scrollTop();
( ( scrollTop + windowHeight > sidebarHeight ) && ( mainContentHeight - sidebarHeight != 0 ) ) ? sidebar.addClass('is-fixed').css('bottom', 0) : sidebar.removeClass('is-fixed').attr('style', '');
}
scrolling = false;
}
});
你可以在 Vue 中监听一个窗口事件，如下所示：
methods: {
onResize(event) {
console.log('window has been resized', event)
}
},
mounted() {
// Register an event listener when the Vue component is ready
window.addEventListener('resize', this.onResize)
},
beforeDestroy() {
// Unregister the event listener before destroying this Vue instance
window.removeEventListener('resize', this.onResize)
}
您必须在创建的钩子中添加事件的侦听器。 例如： window.addEventListener('scroll'， this.handleScroll(;
接下来，您可以在 handleScroll 方法中添加逻辑。
注意：不要忘记删除已销毁钩子上的侦听器！