How to implement a landing editor in angularJs?

Question

Angular

you need to make a landing editor just change the text, change pictures, move blocks, delete add blocks.
example like here lpgenerator en

Answer 1

to implement a landing editor on angularjs, you need to:
1. define tasks
2. make a decomposition of each task (dividing into primitive tasks)
3. choose an implementation approach (through the current angular approach, or through web components notation)
4. start implementing using in your code the main APIs (controller, service, directive, filter, module[getter, setter])
5. test the code (automatically or manually)

Answer 2

Break it down into subtasks (which you almost already did) and find out how each of them is solved in angularjs.
Your question is too general.
You will be more readily answered if you show, for example, the code with which you are trying to make a text change, but it does not work for you as intended.