AngularJS 1.4 --> Angular 9 migration [duplicate]
问题 This question already has answers here : Running Angular and AngularJS frameworks side by side (1 answer) Migrating AngularJS to Angular 4,5 (with DEMO) [closed] (1 answer) Closed 16 days ago . I have decided to do a complete rewrite of the large scale application that I am working on since it is in AngularJS 1.4. I transferred over most of my HTML and CSS files and am now ready to create the TypeScript files. Do I need to create a TypeScript file for every JavaScript file that is in the 1.4