Why doesn't the radio button in materializecss?

Good day, kind of connects css and js paste from the documentation code, text input work perfectly, all buttons work, but insert checkboxes and RadioButton and not output anything except the text here is as in the screenshot 5a75ea504721b673664202.png
Here is the html code radiobuttonui

 <!--Import Google Font Icon-->
 <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
 <!--Import materialize.css-->
 <link type="text/css" rel="stylesheet" href="css/materialize.css" media="screen,projection">

 <!--Let browser know website is optimized for mobile-->
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <meta charset="utf-8">
<title>todo</title>



 <div id="app"></div>
<br / >
 <input name="grp1" type="radio" id="r1">
 <label for="r1">Radio 1</label>

 <input name="grp1" type="radio" id="r2">
 <label for="r2">Radio 2</label>

 <input name="grp1" type="radio" id="r3">
 <label for="r3">Radio 3</label>

 <input name="grp1" type="radio" id="r4">
 <label for="r4">Radio 4</label>

 <!--JavaScript at end of body for optimized loading-->
 <script type="text/javascript" src="js/materialize.min.js"></script>
 <script src="/dist/build.js"></script>

I will be glad if you help me understand what is the reason
June 8th 19 at 16:28

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