Kindly Find Below links for Online Javscript Test:
https://www.testdome.com/tests/javascript-online-test/14
https://www.tutorialspoint.com/javascript/javascript_online_test.htm
https://www.w3schools.com/js/js_quiz.asp
https://www.tutorialsteacher.com/online-test/javascript-test
https://www.wscubetech.com/quiz-test-javascript
https://www.javatpoint.com/javascript-quiz
https://www.techgig.com/skilltest/javascript
https://tests4geeks.com/javascript-online-test