//1. 检查图像是否加载完毕
$('img').load(function () {
console.log('image load successful ');
});
//2. 悬停切换
$(seletor).hover(function () {
$(this).addClass('hover');
}, function () {
$(this).removeClass('hover');
});
//或者使用toggleClass() 方法
$(selector).hover(function () {
$(this).toggleClass('hover');
})
//3. 鼠标滚轮
$('#content').on("mousewheel DOMMouseScroll", function (event) {
// chrome & ie || // firefox
var delta = (event.originalEvent.wheelDelta && (event.originalEvent.wheelDelta > 0 ? 1 : -1)) ||
(event.originalEvent.detail && (event.originalEvent.detail > 0 ? -1 : 1));
if (delta > 0) {
console.log('mousewheel top');
} else if (delta < 0) {
console.log('mousewheel bottom');
}
});
//4. 获取鼠标坐标
//1、 JavaScript实现
X: < input id = "xxx"type = "text" / > Y: < input id = "yyy" type = "text" / >
function mousePosition(ev) {
if (ev.pageX || ev.pageY) {
return {
x: ev.pageX,
y: ev.pageY
};
}
return {
x: ev.clientX + document.body.scrollLeft - document.body.clientLeft,
y: ev.clientY + document.body.scrollTop - document.body.clientTop
};
}
function mouseMove(ev) {
ev = ev || window.event;
var mousePos = mousePosition(ev);
document.getElementById('xxx').value = mousePos.x;
document.getElementById('yyy').value = mousePos.y;
}
document.onmousemove = mouseMove;
// 5. 获取鼠标在元素区域内的坐标、 获取元素相对于页面的坐标
$('#ele').click(function (event) {
//获取鼠标在图片上的坐标
console.log('X：' + event.offsetX + '\n Y:' + event.offsetY);
//获取元素相对于页面的坐标
console.log('X：' + $(this).offset().left + '\n Y:' + $(this).offset().top);
});
//6. 禁止移动端浏览器页面滚动
a.HTML实现
<body ontouchmove = "event.preventDefault()">
b.JavaScript实现
document.addEventListener('touchmove', function (event) {
event.preventDefault();
});
//7. 阻止默认行为
// JavaScript
document.getElementById('btn').addEventListener('click', function (event) {
event = event || window.event；
if (event.preventDefault) {
// W3C
event.preventDefault();
} else {
// IE
event.returnValue = false;
}
}, false);
// jQuery
$('#btn').on('click', function (event) {
event.preventDefault();
});
//8. 阻止冒泡
// JavaScript
document.getElementById('btn').addEventListener('click', function (event) {
event = event || window.event；
if (event.stopPropagation) {
// W3C
event.stopPropagation();
} else {
// IE
event.cancelBubble = true;
}
}, false);
// jQuery
$('#btn').on('click', function (event) {
event.stopPropagation();
});
//9. 检测浏览器是否支持svg
function isSupportSVG() {
var SVG_NS = 'http://www.w3.org/2000/svg';
return !!document.createElementNS && !!document.createElementNS(SVG_NS, 'svg').createSVGRect;
}
console.log(isSupportSVG());
//10. 检测浏览器是否支持canvas
function isSupportCanvas() {
if (document.createElement('canvas').getContext) {
return true;
} else {
return false;
}
}
console.log(isSupportCanvas());
//11. 检测是否是微信浏览器
function isWeiXinClient() {
var ua = navigator.userAgent.toLowerCase();
if (ua.match(/MicroMessenger/i) == "micromessenger") {
return true;
} else {
return false;
}
}
alert(isWeiXinClient());
//12. 检测是否移动端及浏览器内核
var browser = {
versions: function () {
var u = navigator.userAgent;
return {
trident: u.indexOf('Trident') > -1, //IE内核
presto: u.indexOf('Presto') > -1, //opera内核
webKit: u.indexOf('AppleWebKit') > -1, //苹果、谷歌内核
gecko: u.indexOf('Firefox') > -1, //火狐内核Gecko
mobile: !!u.match(/AppleWebKit.*Mobile.*/), //是否移动终端
ios: !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OSX/), //ios
android: u.indexOf('Android') > -1 || u.indexOf('Linux') > -1, //android
iPhone: u.indexOf('iPhone') > -1, //iPhone
iPad: u.indexOf('iPad') > -1, //iPad
webApp: u.indexOf('Safari') > -1 //Safari
};
}
}
if (browser.versions.mobile() || browser.versions.ios() || browser.versions.android() || browser.versions.iPhone() ||
browser.versions.iPad()) {
alert('移动端');
}
//13. 检测是否电脑端 / 移动端
var browser = {
versions: function () {
var u = navigator.userAgent,
app = navigator.appVersion;
var sUserAgent = navigator.userAgent;
return {
trident: u.indexOf('Trident') > -1,
presto: u.indexOf('Presto') > -1,
isChrome: u.indexOf("chrome") > -1,
isSafari: !u.indexOf("chrome") > -1 && (/webkit|khtml/).test(u),
isSafari3: !u.indexOf("chrome") > -1 && (/webkit|khtml/).test(u) && u.indexOf('webkit/5') !=
-1,
webKit: u.indexOf('AppleWebKit') > -1,
gecko: u.indexOf('Gecko') > -1 && u.indexOf('KHTML') == -1,
mobile: !!u.match(/AppleWebKit.*Mobile.*/),
ios: !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/),
android: u.indexOf('Android') > -1 || u.indexOf('Linux') > -1,
iPhone: u.indexOf('iPhone') > -1,
iPad: u.indexOf('iPad') > -1,
iWinPhone: u.indexOf('Windows Phone') > -1
};
}()
}
if (browser.versions.mobile || browser.versions.iWinPhone) {
window.location = "http:/www.baidu.com/m/";
}
//14. 检测浏览器内核
function getInternet() {
if (navigator.userAgent.indexOf("MSIE") > 0) {
return "MSIE"; //IE浏览器
}
if (isFirefox = navigator.userAgent.indexOf("Firefox") > 0) {
return "Firefox"; //Firefox浏览器
}
if (isSafari = navigator.userAgent.indexOf("Safari") > 0) {
return "Safari"; //Safan浏览器
}
if (isCamino = navigator.userAgent.indexOf("Camino") > 0) {
return "Camino"; //Camino浏览器
}
if (isMozilla = navigator.userAgent.indexOf("Gecko/") > 0) {
return "Gecko"; //Gecko浏览器
}
}
//15. 强制移动端页面横屏显示
$(window).on("orientationchange", function (event) {
if (event.orientation == 'portrait') {
$('body').css('transform', 'rotate(90deg)');
} else {
$('body').css('transform', 'rotate(0deg)');
}
});
$(window).orientationchange();
//16. 电脑端页面全屏显示
function fullscreen(element) {
if (element.requestFullscreen) {
element.requestFullscreen();
} else if (element.mozRequestFullScreen) {
element.mozRequestFullScreen();
} else if (element.webkitRequestFullscreen) {
element.webkitRequestFullscreen();
} else if (element.msRequestFullscreen) {
element.msRequestFullscreen();
}
}
fullscreen(document.documentElement);
//17. 获得 / 失去焦点
<input id = "i_input" type = "text" value = "会员卡号/手机号" / >
// JavaScript
window.onload = function () {
var oIpt = document.getElementById("i_input");
if (oIpt.value == "会员卡号/手机号") {
oIpt.style.color = "#888";
} else {
oIpt.style.color = "#000";
};
oIpt.onfocus = function () {
if (this.value == "会员卡号/手机号") {
this.value = "";
this.style.color = "#000";
this.type = "password";
} else {
this.style.color = "#000";
}
};
oIpt.onblur = function () {
if (this.value == "") {
this.value = "会员卡号/手机号";
this.style.color = "#888";
this.type = "text";
}
};
}
jQuery实现
<input type = "text" class = "oldpsw" id = "showPwd" value = "请输入您的注册密码" / >
<input type = "password" name = "psw" class = "oldpsw" id = "password" value = "" style = "display:none;" / >
// jQuery
$("#showPwd").focus(function () {
var text_value = $(this).val();
if (text_value == '请输入您的注册密码') {
$("#showPwd").hide();
$("#password").show().focus();
}
});
$("#password").blur(function () {
var text_value = $(this).val();
if (text_value == "") {
$("#showPwd").show();
$("#password").hide();
}
});
18. 限制字符数
<input id = "txt" type = "text" >
//字符串截取
function getByteVal(val, max) {
var returnValue = '';
var byteValLen = 0;
for (var i = 0; i < val.length; i++) {
if (val[i].match(/[^\x00-\xff]/ig) != null) byteValLen += 2;
else byteValLen += 1;
if (byteValLen > max) break;
returnValue += val[i];
}
return returnValue;
}
$('#txt').on('keyup', function () {
var val = this.value;
if (val.replace(/[^\x00-\xff]/g, "**").length > 14) {
this.value = getByteVal(val, 14);
}
});
19. 验证码倒计时
<input id = "send" type = "button" value = "发送验证码" >
// JavaScript
var times = 60, // 时间设置60秒
timer = null;
document.getElementById('send').onclick = function () {
// 计时开始
timer = setInterval(function () {
times--;
if (times <= 0) {
send.value = '发送验证码';
clearInterval(timer);
send.disabled = false;
times = 60;
} else {
send.value = times + '秒后重试';
send.disabled = true;
}
}, 1000);
}
jQuery实现
var times = 60,
timer = null;
$('#send').on('click', function () {
var $this = $(this);
// 计时开始
timer = setInterval(function () {
times--;
if (times <= 0) {
$this.val('发送验证码');
clearInterval(timer);
$this.attr('disabled', false);
times = 60;
} else {
$this.val(times + '秒后重试');
$this.attr('disabled', true);
}
}, 1000);
});
//20. 时间倒计时
<p id = "_lefttime" > < /p>
var times = 60,
timer = null;
$('#send').on('click', function () {
var $this = $(this);
// 计时开始
timer = setInterval(function () {
times--;
if (times <= 0) {
$this.val('发送验证码');
clearInterval(timer);
$this.attr('disabled', false);
times = 60;
} else {
$this.val(times + '秒后重试');
$this.attr('disabled', true);
}
}, 1000);
});
//21. 倒计时跳转
<div id = "showtimes" > < /div>
// 设置倒计时秒数
var t = 10;
// 显示倒计时秒数
function showTime() {
t -= 1;
document.getElementById('showtimes').innerHTML = t;
if (t == 0) {
location.href = 'error404.asp';
}
//每秒执行一次 showTime()
setTimeout("showTime()", 1000);
}
showTime();
//22. 时间戳、 毫秒格式化
function formatDate(now) {
var y = now.getFullYear();
var m = now.getMonth() + 1; // 注意 JavaScript 月份+1
var d = now.getDate();
var h = now.getHours();
var m = now.getMinutes();
var s = now.getSeconds();
return y + "-" + m + "-" + d + " " + h + ":" + m + ":" + s;
}
var nowDate = new Date(1442978789184);
alert(formatDate(nowDate));
//23. 当前日期
function formatDate(now) {
var y = now.getFullYear();
var m = now.getMonth() + 1; // 注意 JavaScript 月份+1
var d = now.getDate();
var h = now.getHours();
var m = now.getMinutes();
var s = now.getSeconds();
return y + "-" + m + "-" + d + " " + h + ":" + m + ":" + s;
}
var nowDate = new Date(1442978789184);
//24. 判断周六 / 周日
<p id = "text" > < /p>
function time(y, m) {
var tempTime = new Date(y, m, 0);
var time = new Date();
var saturday = new Array();
var sunday = new Array();
for (var i = 1; i <= tempTime.getDate(); i++) {
time.setFullYear(y, m - 1, i);
var day = time.getDay();
if (day == 6) {
saturday.push(i);
} else if (day == 0) {
sunday.push(i);
}
}
var text = y + "年" + m + "月份" + "<br />" +
"周六：" + saturday.toString() + "<br />" +
"周日：" + sunday.toString();
document.getElementById("text").innerHTML = text;
}
time(2018, 5);
//25. AJAX调用错误处理
当 Ajax 调用返回 404 或 500 错误时， 就执行错误处理程序。 如果没有定义处理程序， 其他的 jQuery 代码或会就此罢工。 定义一个全局的 Ajax 错误处理程序
$(document).ajaxError(function (e, xhr, settings, error) {
console.log(error);
})