Learn ExtJS from Udemy

Udemy, is an online learning platform aimed at professional adults and students, developed in May 2010. As of Jan 2020, the platform has more than 50 million students and 57,000 instructors teaching courses in over 65 languages. There have been over 295 million course enrollments. Students and instructors come from 190+ countries and 2/3 of students are located outside of the U.S. Udemy also has over 5,000 enterprise customers and 80% of Fortune 100 companies use Udemy for employee upskilling. Students take courses largely as a means of improving job-related skills. Some courses generate credit toward technical certification. Udemy has made a special effort to attract corporate trainers seeking to create coursework for employees of their company. As of 2020, there are more than 150,000 courses on the website.The headquarters of Udemy is located in San Francisco, CA with satellite offices in Denver, CO; Dublin, IR; Ankara, TR; Sao Paulo, BR; and Gurgaon, IN. - read more on Wikipedia