I'm working in JavaScript and need to create a function for multiple protein sequence alignment. I'd prefer a function like the following in which a string of FASTA sequences is passed in and the clustal alignment .txt result is returned.

function align(fastaSequences) {
    // run clustal omega alignment on fastaSequences
    return alignment;
}

Any input or output format would work, though. How can I use the Clustal Omega REST API in JavaScript? (see http://www.ebi.ac.uk/Tools/webservices/services/msa/clustalo_rest).