废话不多说，直接上干货。。

具体代码如下所示：

var subString = function(str, len) {var newLength = 0;var newStr = "";var chineseRegex = /[^\x00-\xff]/g;var singleChar = "";var strLength = str.replace(chineseRegex, "**").length;for (var i = 0; i < strLength; i++) {singleChar = str.charAt(i).toString();if (singleChar.match(chineseRegex) != null) {newLength += 2;} else {newLength++;}if (newLength > len) {break;}newStr += singleChar;}if (strLength > len) {newStr += "...";}return newStr;}--------------------------------------------------------------------------------function close_window(){var flag=false;$(".dialog_con").each(function(){if($(this).is(":visible")){flag=true;}})if(flag==true){$(".dialog_con").hide();$(".dialogbox").hide(); }else{ window.android.callAndroidFinish();}} --------------------------------------------------------------------------------<script type = "text/javascript" >if (/(iPad|iPod|iOS)/i.test(navigator.userAgent)) { setActiveStyleSheet("pad.css"); } else if (/(Android)/i.test(navigator.userAgent)) {setActiveStyleSheet("common.css"); }else if (/(iPhone6)/i.test(navigator.userAgent)) {setActiveStyleSheet("iphone6.css"); }function setActiveStyleSheet(filename){document.write("<link href="+filename+" rel=stylesheet>");}</script>--------------------------------------------------------------------------------$('a.top').click(function (e) {e.preventDefault();$(document.body).animate({scrollTop: 0}, 800);});--------------------------------------------------------------------------------$('img').load(function () {console.log('image load successful');});--------------------------------------------------------------------------------$('img').on('error', function () {$(this).prop('src', 'img/broken.png');});--------------------------------------------------------------------------------$('.btn').hover(function () {$(this).addClass('hover');}, function () {$(this).removeClass('hover');});-----------或---------$('.btn').hover(function () {$(this).toggleClass('hover');});--------------------------------------------------------------------------------$('input[type="submit"]').prop('disabled', true);$('input[type="submit"]').prop('disabled', false);--------------------------------------------------------------------------------$('a.no-link').click(function (e) {e.preventDefault();});--------------------------------------------------------------------------------// Fade$('.btn').click(function () {$('.element').fadeToggle('slow');});// Toggle$('.btn').click(function () {$('.element').slideToggle('slow');});--------------------------------------------------------------------------------// Close all panels$('#accordion').find('.content').hide();// Accordion$('#accordion').find('.accordion-header').click(function () {var next = $(this).next();next.slideToggle('fast');$('.content').not(next).slideUp('fast');return false;});--------------------------------------------------------------------------------$('.div').css('min-height', $('.main-div').height());该例设置了 min-height，意味着它可以比主要 div 更大，但永远不能更小。但有一个更加灵活的方法是遍历一组元素的设置，然后将高度设为元素中的最高值：var $columns = $('.column');var height = 0;$columns.each(function () {if ($(this).height() &gt; height) {height = $(this).height();}});$columns.height(height);如果你想让所有列都有相同高度：var $rows = $('.same-height-columns');$rows.each(function () {$(this).find('.column').height($(this).height());}); --------------------------------------------------------------------------------$('a[href^="http"]').attr('target', '_blank');$('a[href^="//"]').attr('target', '_blank');$('a[href^="' + window.location.origin + '"]').attr('target', '_self');--------------------------------------------------------------------------------var search = $('#search').val();$('div:not(:contains("' + search + '"))').hide();--------------------------------------------------------------------------------$(document).on('visibilitychange', function (e) {if (e.target.visibilityState === "visible") {console.log('Tab is now in view!');} else if (e.target.visibilityState === "hidden") {console.log('Tab is now hidden!');}});--------------------------------------------------------------------------------$(document).ajaxError(function (e, xhr, settings, error) {console.log(error);});--------------------------------------------------------------------------------$('#elem').show();$('#elem').html('bla');$('#elem').otherStuff();上面这段代码，可以通过链式操作大大改进：$('#elem').show().html('bla').otherStuff();还有另外一种方法，把元素缓存在变量中（前缀是 $ ）：var $elem = $('#elem');$elem.hide();$elem.html('bla');$elem.otherStuff();--------------------------------------------------------------------------------//全选 全不选$('#checkAll').click(function () {//判断是否被选中var bischecked = $('#checkAll').is(':checked');var fruit = $('input[name="check"]');bischecked ? fruit.attr('checked', true) : fruit.attr('checked', false);});//反选 遍历checkbox 如果当前为选中 就设置为 不选中 反之相同$("#tabVouchList tr").each(function () {if ($("td:eq(0) input[name='check']", $(this)).is(':checked')) {$(this).attr('checked', false);} else {$(this).attr('checked', true);}});

以上所述是小编给大家提供的js小技巧总结，希望对大家有所帮助！