is - nodef/extra-function GitHub Wiki
Check if value is a function.
Similar: is, isAsync, isGenerator.
function is(v)
// v: a value
const xfunction = require('extra-function');
xfunction.is(Object.keys);
// → true
xfunction.is(() => 0);
// → true
xfunction.is(async () => 0);
// → true
xfunction.is(0);
// → false