var a='http://localhost:8088/CustomForm/CustomForm/TableMobelRfForm/Index?_FormId=102417&SN=75648_16' js 怎么判断a里面是否包含/CustomForm/CustomForm/

可以使用JavaScript中的`includes()`方法来判断字符串中是否包含某个子字符串。使用方法如下：

var a = 'http://localhost:8088/CustomForm/CustomForm/TableMobelRfForm/Index?_FormId=102417&SN=75648_16';
if (a.includes('/CustomForm/CustomForm/')) {
  console.log('字符串a中包含/CustomForm/CustomForm/');
} else {
  console.log('字符串a中不包含/CustomForm/CustomForm/');
}

输出结果为：

字符串a中包含/CustomForm/CustomForm/