How to determine whether the CheckBox selected is empty

What I bring to you this time is how to determine whether the CheckBox selected is empty in JS. Here is a practical column for everyone to analyze.

var chk_value = [];//定义一个数组
//name是CheckBox的name属性定义的名称
$('input[name="time"]:checked').each(function () {
chk_value.push($(this).val());
});
  
if (chk_value.length < 1) {
alert("CheckBox选项为空")
return false;
}
  
alert(chk_value );

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