in lib/is.js [248:272]
function def (options) {
var fn = function (data, opts) {
if (!util.isString(data)) {
return false;
}
if (options.re) {
options.re.lastIndex = 0;
if (!options.re.test(data)) {
return false;
}
}
return options.after ? options.after(data, opts || {}) : true;
};
var path = options.fn.split('.');
var target = module.exports;
while (path.length > 1) {
var next = path.shift();
target = (target[next] = target[next] || {});
}
target[path[0]] = fn;
}