dist/vue-resource.esm.js
function root (options$$1, next) {

    var url = next(options$$1);

    if (isString(options$$1.root) && !/^(https?:)?\//.test(url)) {
        url = trimEnd(options$$1.root, '/') + '/' + url;
    }

    return url;
}
function root (options$$1, next) {

    var url = next(options$$1);

    if (isString(options$$1.root) && !/^(https?:)?\//.test(url)) {
        url = trimEnd(options$$1.root, '/') + '/' + url;
    }

    return url;
}
function root ( options$$1 , next ) { var url = next ( options$$1 ) ; if ( isString ( options$$1 . root ) && ! / ^(https?:)?\/ / . test ( url ) ) { url = trimEnd ( options$$1 . root , '/' ) + '/' + url ; } return url ; }
Root Prefix Transform.
Root Prefix Transform .