as above, I want to change jobs in the next recruitment season. I want to learn ng, from the needs of companies in the market, but it is very difficult. I don"t know which version to read first. In fact, I have read the tutorials of angular5 and have some preliminary understanding of ng, that is, angular, with version 5 of angular-cli- does not have a thorough understanding from version 1 to version 2 from version 1 to version 2 when learning vue.