since 1.0.0
Verify if the given variable(s) exists in the structure (url, string or json) used in the UTMManager().
The following table presents all parameters combination that can be used in this function.
| PARAMETERS | SINCE | DESCRIPTION |
|---|---|---|
| 1.0.0 | Verifies if the given variables in is() function is defined |
Taking action based on result
utm.is('utm_source')
.defined()
.then(() => {
console.log('it is defined')
})Obtaining the boolean result
let result = utm.is('utm_source').defined().result()
// true or false