如果我的屏幕宽度小于960像素，我如何让jQuery做一些事情?下面的代码总是触发第二个警报，不管我的窗口大小:
if (screen.width < 960) {
alert('Less than 960');
}
else {
alert('More than 960');
}
当前回答
试试这段代码
if ($(window).width() < 960) {
alert('width is less than 960px');
}
else {
alert('More than 960');
}
If ($(window).width() < 960) { 警报('宽度小于960px'); ｝ 其他{ alert('大于960'); ｝ < script src = " https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js " > < /脚本>
其他回答
我建议(jQuery需要):
/*
* windowSize
* call this function to get windowSize any time
*/
function windowSize() {
windowHeight = window.innerHeight ? window.innerHeight : $(window).height();
windowWidth = window.innerWidth ? window.innerWidth : $(window).width();
}
//Init Function of init it wherever you like...
windowSize();
// For example, get window size on window resize
$(window).resize(function() {
windowSize();
console.log('width is :', windowWidth, 'Height is :', windowHeight);
if (windowWidth < 768) {
console.log('width is under 768px !');
}
});
在CodePen中添加: http://codepen.io/moabi/pen/QNRqpY?editors=0011
然后你可以用var: windowWidth很容易地得到窗口的宽度 和高度:windowHeight
否则，获取一个js库: http://wicky.nillia.ms/enquire.js/
// Adds and removes body class depending on screen width.
function screenClass() {
if($(window).innerWidth() > 960) {
$('body').addClass('big-screen').removeClass('small-screen');
} else {
$('body').addClass('small-screen').removeClass('big-screen');
}
}
// Fire.
screenClass();
// And recheck when window gets resized.
$(window).bind('resize',function(){
screenClass();
});
我建议不要使用jQuery来做这样的事情，而是继续使用window.innerWidth:
if (window.innerWidth < 960) {
doSomething();
}
我知道现在回答这个问题有点晚了，但我希望这对有类似问题的人有所帮助。当页面因任何原因刷新时，它也可以工作。
$(document).ready(function(){
if ($(window).width() < 960 && $(window).load()) {
$("#up").hide();
}
if($(window).load()){
if ($(window).width() < 960) {
$("#up").hide();
}
}
$(window).resize(function() {
if ($(window).width() < 960 && $(window).load()) {
$("#up").hide();
}
else{
$("#up").show();
}
if($(window).load()){
if ($(window).width() < 960) {
$("#up").hide();
}
}
else{
$("#up").show();
}
});});
简单干净的解决方案使用香草JavaScript
let app = document.getElementById('app') const changeColorFn = ( app, color ) => { app.setAttribute("style",`background: ${color}`) } const winSizeFn = ( winWidth, callback, app, color ) => { if (window.innerWidth < winWidth ) { callback(app, color); } } winSizeFn( '1200', changeColorFn, app, 'red' ) winSizeFn( '800', changeColorFn, app, 'green' ) winSizeFn( '500', changeColorFn, app, 'blue' ) window.addEventListener("resize", (e) => { // add winSizeFn here if you want call function on window resize }) <div id="app">My app content</div>
