Which is best way to practice Javascript?

Best way to practice JavaScript is to work on the project.

You can write javascript at server end also practice it more. Node.js will help you in this.

Some sample projects that can be done be any set of stack in Front-end are:

ToDo List
Music Library
Contact/Phone Book
Any project that involves CRUD operations.
Don't take on the Project whole at once. Let's Take ToDo List. Don't try to build all features of advanced ToDo at once. Go Step by Step like:

Add ToDo Items and simultaneously update the View/DOM for new added item
Delete the ToDo Item and update view
Edit the ToDo item and reflect the changes
Can be marked and complete or incomplete
Try to add a deadline/completion date to todo item
Add Location to the todo items.
This above was single list, now make multiple lists in single application
Naming and Renaming the lists
Doing AJAX for small parts of the ToDo list and
Multiple User registration and Login
Every user can have multiple lists
etc..
List will go on, you can take examples from advanced ToDo applications, but idea is to keep enhancing it.

Same enhancement steps can be done on any project.

Best way to practice JavaScript is to work on the project.

You can write javascript at server end also practice it more. Node.js will help you in this.

Some sample projects that can be done be any set of stack in Front-end are:

ToDo List
Music Library
Contact/Phone Book
Any project that involves CRUD operations.
Don't take on the Project whole at once. Let's Take ToDo List. Don't try to build all features of advanced ToDo at once. Go Step by Step like:

Add ToDo Items and simultaneously update the View/DOM for new added item
Delete the ToDo Item and update view
Edit the ToDo item and reflect the changes
Can be marked and complete or incomplete
Try to add a deadline/completion date to todo item
Add Location to the todo items.
This above was single list, now make multiple lists in single application
Naming and Renaming the lists
Doing AJAX for small parts of the ToDo list and
Multiple User registration and Login
Every user can have multiple lists
etc..
List will go on, you can take examples from advanced ToDo applications, but idea is to keep enhancing it.

Same enhancement steps can be done on any project.