improve delay arg

src/scriptlets/trusted-click-element.js

@@ -17,11 +17,11 @@ import {
  * ```
  *
  * - `selectors` — required, string with query selectors delimited by comma
- * - 'delay' - optional, time in ms to delay scriptlet execution after elements are loaded and targeted on the page, defaults to 0
  * - `extraMatch` — optional, extra condition to check on a page; allows to match `cookie` and `localStorage`; can be set as `name:key[=value]` where `value` is optional.
  * Multiple conditions are allowed inside one `extraMatch` but they should be delimited by comma and each of them should match the syntax. Possible `name`s:
  *    - `cookie` - test substring against document.cookie string
  *    - `localStorage` - check if localStorage item is present
+ * - 'delay' - optional, time in ms to delay scriptlet execution, defaults to instant execution.
  * **Examples**
  * 1. Click elements by selector
  * ```
@@ -54,7 +54,7 @@ import {
  * ```
  */
 /* eslint-enable max-len */
-export function trustedClickElement(source, selectors, delay, extraMatch = '') {
+export function trustedClickElement(source, selectors, extraMatch = '', delay = NaN) {
     if (!selectors) {
         return;
     }
@@ -69,7 +69,8 @@ export function trustedClickElement(source, selectors, delay, extraMatch = '') {
     let parsedDelay;
     if (delay) {
         parsedDelay = parseInt(delay, 10);
-        if (Number.isNaN(parsedDelay) || parsedDelay > OBSERVER_TIMEOUT) {
+        const isValidDelay = !Number.isNaN(parsedDelay) || parsedDelay < OBSERVER_TIMEOUT;
+        if (!isValidDelay) {
             log(`Passed delay '${delay}' is invalid or bigger than ${OBSERVER_TIMEOUT} ms`);
             return;
         }