How to place a JavaScript variable value in HTML input tag's value?

Question

$( window ).on( "load", function(){
        var token_val= document.getElementsByName("token")[0].value;

        var real_data = "<input type='hidden' name='token' value='NEED VLAUE OF token_val HERE'>";

        $('form').append(real_data);
});

This my code. I need to set value on input tag as variable token_val 's value.

Answer 1

$( window ).on( "load", function(){
    var token_val= document.getElementsByName("token")[0].value;

    var real_data = "<input type='hidden' name='token' value='" + token_val + "'>";

    $('form').append(real_data);
});