pub fn append_blob<T>( &self, name: &str, value: &T, filename: Option< &str > ) where T: IBlob {
        js! { @(no_return)
            @{self}.append(@{name}, @{value.as_ref()}, @{filename});
        }
    }
/// Appends a new blob onto an existing key, or adds the key if it does not already exist.
///
/// [(JavaScript docs)](https://developer.mozilla.org/en-US/docs/Web/API/FormData/append)
// https://xhr.spec.whatwg.org/#dom-formdata-append-blob
Appends a new blob onto an existing key, or adds the key if it does not already exist.
Appends a new blob onto an existing key or adds the key if it does not already exist .
pub fn append_blob<T>( &self, name: &str, value: &T, filename: Option< &str > ) where T: IBlob {
        js! { @(no_return)
            @{self}.append(@{name}, @{value.as_ref()}, @{filename});
        }
    }
pub fn append_blob < T > ( & self , name : & str , value : & T , filename : Option < & str > ) where T : IBlob { js ! { ( no_return ) { self } append ( { name } { value as_ref ( ) } { filename } ) } }
Appends a new blob onto an existing key, or adds the key if it does not already exist.
Appends a new blob onto an existing key or adds the key if it does not already exist .
&self
name
&str
value
&T
filename
Option< &str >
&self
name
&str
value
&T
filename
Option< &str >