What technical basis does webapp development require? What else does html5jscss3PHP need?

What technical basis does webapp development require? Is there any technical foundation required for webapp development? Or do you have any webapp video tutorials or materials for recommendation?

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What technical basis does webapp development require? Or do you have any webapp video tutorials or materials for recommendation?

Database: for example, mysql
SQL language: programming language for Databases
Web containers: such as apache and nginx
You also need to know some project management tools, such as maven, svn, git, etc.
Other basic knowledge, such as http and https

The app store does not allow webapps.

Front-end html + css + js + nodejs, including various frameworks such as jquery, bootstrap, reactjs, requirejs, swigjs, and angularjs,
Backend: various language types
Databases: relational databases such as mysql, oracle, and db2, non-relational databases such as redis and mongdb, and embedded relational database sqlite

How do you position your career development!

It's better to read some webapp development frameworks at the beginning. Feel the design idea and get started easily.
There are a lot of such development frameworks to search for. Each framework has its own uniqueness and can be selected based on your preferences.