元素选择器：
xx.html<input id="usernameID" class="usernameCLASS" name="usernameNAME" >
xx.jsfunction(){ ???var username= $("#usernameID").val(); ???var username= $(".usernameCLASS").val(); ???var username= $(‘input[name="usernameNAME"]‘).val();}ajax请求:
$(function(){ ???$(‘#send‘).click(function(){ ????????$.ajax({ ????????????type: "get", ????????????url: "***/***", ????????????data: { username:"superslow" }, ????????????dataType: "json", ????????????success: function(data){ ????????????}, ????????????error:function() { ????????????} ????????}); ???});}); ?????Ajax向java后台中传值为数组时，后台接收不到（为null）的问题
列表节点选择遍历
$(‘ul li‘).remove();$(‘ul li‘).each(function(){ ???$(this).remove();}); $("ul").find("li").remove(); $(‘ul‘).children().filter(‘li‘).remove();js中常见命令
原文地址：https://www.cnblogs.com/superslow/p/10528494.html