Question

嘿朋友，我正在尝试使用window.matchMedia("(max-width: 1700px)")在页面小于等于1700px时在html中添加一些元素。现在，我只是想通过在屏幕上显示功能警报“哟”来对其进行测试。这不如我尝试更改的其他功能好吗？有什么想法吗？

https://jsfiddle.net/yat5ncmk/6/

const ham = document.querySelector('.nav-box');
const menu = document.querySelector('.menu');
const menuClose = document.querySelector('#menu-close');
const leftArrow = document.querySelector('#left');
const rightArrow = document.querySelector('#right');
const img = document.querySelector('.image-slider');
var x = window.matchMedia("(max-width: 1700px)");
let num = 1;

x.addEventListener(adjustMenuDesign);
adjustMenuDesign(x);

ham.addEventListener('click', function() {
	ham.classList.add('ham-open');
	menu.style.marginLeft = '50px';
})

menuClose.addEventListener('click', function() {
	ham.classList.remove('ham-open');
	menu.style.marginLeft = '-700px';
})

leftArrow.addEventListener('click', function() {
	num--;
	if(num > 0) {
		img.style.backgroundImage = 'url(img/fam-' + num + '.jpeg)';
		console.log(num);
		console.log(img.style.backgroundImage);
	} else {
		num = 4;
		img.style.backgroundImage = 'url(img/fam-' + num + '.jpeg)';
	}
})

rightArrow.addEventListener('click', function() {
	num++;
	if(num <= 4) {
		img.style.backgroundImage = 'url(img/fam-' + num + '.jpeg)';
		console.log(num);
		console.log(img.style.backgroundImage);
	} else {
		num = 1;
		img.style.backgroundImage = 'url(img/fam-' + num + '.jpeg)';
	}	
})

function adjustMenuDesign(width) {
    if (width.matches) { // If media query matches
	    alert('yo');
	} 
}

window.sr = ScrollReveal();

sr.reveal('.logo-wrap', {
	duration: 2000
});

sr.reveal('.w1', {
	duration: 2000,
	origin: 'bottom'
});

sr.reveal('.w2', {
	duration: 3000,
	origin: 'bottom'
});

sr.reveal('.w3', {
	duration: 4000,
	origin: 'bottom'
});

sr.reveal('.hours-line-left', {
	duration: 1000,
	origin: 'left',
	distance: '200px'
});

sr.reveal('.hours-line-right', {
	duration: 1000,
	origin: 'right',
	distance: '200px'
});

sr.reveal('.contact-line', {
	duration: 1000,
	origin: 'bottom',
	distance: '250px'
});

sr.reveal('.burrito', {
	duration: 1000,
	origin: 'right',
	distance: '250px'
});

sr.reveal('.taco', {
	duration: 1000,
	origin: 'right',
	distance: '250px'
});

sr.reveal('.guac', {
	duration: 1000,
	origin: 'right',
	distance: '250px'
});

sr.reveal('.nachos', {
	duration: 1000,
	origin: 'bottom',
	distance: '250px'
});

sr.reveal('.hot', {
	duration: 1000,
	origin: 'left',
	distance: '250px'
});

sr.reveal('.back-to-top', {
	duration: 1000,
	origin: 'bottom',
});

sr.reveal('.btp-arrow', {
	duration: 1500,
	origin: 'top',
	distance: '250px'
});

Answer 1

几个问题。

x.addEventListener(adjustMenuDesign);

错误，因为addEventListener需要一个事件和一个回调。但是您可能打算将其添加到resize事件中。

window.addEventListener("resize", adjustMenuDesign);

此外，您将需要在调整大小时再次运行matchMedia查询，因此在此处将这段代码移入AdjustMenuDesign将很有意义。

以下是这些更改的有效提要。

https://jsfiddle.net/veckopab/

window.matchMedia（“（最大宽度：1700px）”）;不起作用？

1 个答案: