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## Recommended: "Jquery method to determine whether checkbox is selected: 1. Use is to determine, the code is [if($('#checkbox-id').is(':checked'))]; 2. Use attr to determine , the code is [if ($('#checkbox-id').attr()].
jquery video tutorial》
The operating environment of this tutorial: windows7 system, jquery3.5.1 version, this method is suitable for all brands of computers.Jquery method to determine whether the checkbox is selected:
Method one (suggestion):
if ($("#checkbox-id").get(0).checked) { // do something }Thanks to Doubanlv for adding:
if ($("#checkbox-id")[0].checked) { // do something }
Method two (suggestion):
if($('#checkbox-id').is(':checked')) { // do something }
Method three (may be invalid):
if ($('#checkbox-id').attr('checked')) { // do something }
Method four:
if ($('#checkbox-id').prop('checked')) { // do something }
jquery’s various methods for checkbox Operation
//注意: 操作checkbox的checked,disabled属性时jquery1.6以前版本用attr,1.6以上(包含)建议用prop //1、根据id获取checkbox $("#cbCheckbox1"); //2、获取所有的checkbox $("input[type='checkbox']");//or $("input[name='cb']"); //3、获取所有选中的checkbox $("input:checkbox:checked");//or $("input:[type='checkbox']:checked");//or $("input[type='checkbox']:checked");//or $("input:[name='ck']:checked"); //4、获取checkbox值 //用.val()即可,比如: $("#cbCheckbox1").val(); //5、获取多个选中的checkbox值 var vals = []; $('input:checkbox:checked').each(function (index, item) { vals.push($(this).val()); }); //6、判断checkbox是否选中(jquery 1.6以前版本 用 $(this).attr("checked")) $("#cbCheckbox1").click(function () { if ($(this).prop("checked")) { alert("选中"); } else { alert("没有选中"); } }); //7、设置checkbox为选中状态 $('input:checkbox').attr("checked", 'checked');//or $('input:checkbox').attr("checked", true); //8、设置checkbox为不选中状态 $('input:checkbox').attr("checked", '');//or $('input:checkbox').attr("checked", false); //9、设置checkbox为禁用状态(jquery<1.6用attr,jquery>=1.6建议用prop) $("input[type='checkbox']").attr("disabled", "disabled");//or $("input[type='checkbox']").attr("disabled", true);//or $("input[type='checkbox']").prop("disabled", true);//or $("input[type='checkbox']").prop("disabled", "disabled"); //10、设置checkbox为启用状态(jquery<1.6用attr,jquery>=1.6建议用prop) $("input[type='checkbox']").removeAttr("disabled");//or $("input[type='checkbox']").attr("disabled", false);//or $("input[type='checkbox']").prop("disabled", "");//or $("input[type='checkbox']").prop("disabled", false);
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