Home  >  Article  >  Web Front-end  >  How to determine whether checkbox is selected in jquery

How to determine whether checkbox is selected in jquery

coldplay.xixi
coldplay.xixiOriginal
2020-11-24 14:07:583946browse

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()].

How to determine whether checkbox is selected in jquery

## Recommended: "

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=&#39;checkbox&#39;]").attr("disabled", "disabled");//or
    $("input[type=&#39;checkbox&#39;]").attr("disabled", true);//or
    $("input[type=&#39;checkbox&#39;]").prop("disabled", true);//or
    $("input[type=&#39;checkbox&#39;]").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=&#39;checkbox&#39;]").removeAttr("disabled");//or
    $("input[type=&#39;checkbox&#39;]").attr("disabled", false);//or
    $("input[type=&#39;checkbox&#39;]").prop("disabled", "");//or
    $("input[type=&#39;checkbox&#39;]").prop("disabled", false);

Related free learning recommendations:

JavaScript (video)

The above is the detailed content of How to determine whether checkbox is selected in jquery. For more information, please follow other related articles on the PHP Chinese website!

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn