I want to change value of web html element.

for example, web HTML element is like this.

<dd>
    <a nocr="" onclick="goOtherTCR(this, 'a=nco_x2v*4.day&amp;r=1&amp;i=1800009E_000000000000');return false;" href="#" class="_btn_time _text">00.00(Mon)Today</a>     <--- point1


    <ul>
         <li class '_i on' data-value='2022-00-00'>     
               <a onclick="return goOtherCR(this,&quot;a=nco_x2v*4&amp;r=1&amp;i=&quot;+urlencode(&quot;1800009E_000000DA154F&quot;)+&quot;&amp;u=&quot;+urlencode(this.href));" href="#">00.00(mon)Today</a>
         </li>
      
         <li> class '_i' data-value = '2022-00-01'>
                <a onclick="return goOtherCR(this,&quot;a=nco_x2v*4&amp;r=1&amp;i=&quot;+urlencode(&quot;1800009E_000000DA154F&quot;)+&quot;&amp;u=&quot;+urlencode(this.href));" href="#">00.01(Tue)</a>
         </li>
    </ul>
</dd>   
  

<my code> has nothing...

Future<List<MvTime>> getData() async {
try {
    final response = await http.get(Uri.parse(url), headers: {
    //"Accept": "application/json",
    //"Access-Control_Allow_Origin": "*"
    "Content-Type": "text/plain",
    });
    final body = response.body;
    final hhtml = parse(body);

    <here is the point that i want to write code to change web html element value>

}
)

if i click the date(04.28) in web, point 1's( -> where class value is '_btn_time _text') text value changes to today's date to 04.28 and the code class value which one has same date(data-value) changes to '_i' to '_i on'.

I want to change the date by using flutter.

But I can't find the function to change HTML value by using flutter.(In js, somebody tell me that if i use 'element.classList', i can change the HTML value.)

is there any way to change the value of HTML Element by using flutter?