JSFiddle - React, Tailwind, and code Playground

JavaScript

var bucket = [ 'biographies', 'images', 'artist_location', 'urls' ];

function getParams( arr ) {
    var params = [];

    for ( i = 0; i < arr.length; ++i ) {
        params.push( 'bucket=' + arr[ i ] );
    }
    
    return params.join( '&' );
}

alert( getParams( bucket ) );