The document outlines the top 13 mistakes made by AngularJS developers, emphasizing issues like excessive watchers, underutilization of tools, and improper scope management. It stresses the importance of testing applications, effective use of debugging tools like Batarang, and avoiding direct DOM manipulation. Overall, it encourages developers to learn from common pitfalls to enhance their coding practices and application performance.

2. Top 13 Mistakes
Committed By
Angular JavaScript
Developers

3. Keep a track on the
count of Watchers
Angular JS creates a watcher for
every binding. Evaluation and
comparison for previous bindings are
done at each digest phase. In the end,
the number of watchers comes out to
be huge. Few watchers are okay but
these watchers start getting
troublesome when there are
hundreds and thousands of them in
the code eventually slowing down
the performance of an application in
the browser.
ONE

4. Inability To Use The
Available Tools
Most of the developers do not
utilize the available tools to their
best extent. This is one of the
most disappointing circumstances
since it becomes necessary to
utilise a tool sooner or later. For
instance, Firefox and Chrome
incorporate uncommon
improvement strings that involve
investigation, mistake yield and
profiling.
TWO

5. Not Compartmentalizing
Properly
Compartmentalizing your code is the
core part of coding in Angular JS. When
you work with MVC, the general
concept is that you have a controller
for a view. The controller is your
rationale layer, and it’s imperative that
inside this layer you make compact
compartments for each area of your
application
THREE

6. Falling Back Into
jQuery
jQuery is a customary library for
handling events and for making
DOM Manipulations easier.
However, AngularJS, on the other
hand, is a framework that is used
for the creation of scalable
applications, testing and
development of applications and
hence it cannot be utilised in the
amplification of HTML
documents.
FOUR

7. Angular’s horizon is seized to hold all the
data that is required to show all the
content of the page to the user. It is quite
affable that permits writing of custom
functions based upon the crowded
content.
Angular JS can be perfect specifically
when it comes to appending functionality
grounded on forecasted data like
boasting a button based on user input.
Improper Use Of Event
Handlers
FIVE

8. Don’t forget to Test
It’s quite handy for the developers to
compile and execute an application
on their individual machines and
presuming that it goes well with
every other system out there. Not
testing an application before their
release is a common mistake among
developers because they don’t
understand the fact that different
environments can instigate bugs.
SIX

9. Fail to Utilize Batarang
Batarang is an extraordinary Google
Chrome extension which is employed for
debugging and developing Angular JS
applications. Batarang can be useful
when operating on abstracting scopes
where arguments are limited. Avoid the
common mistake of not utilizing this tool
to its full potential.
SEVEN

10. Fixed Scope Binding
Normally, Angular accompanies its very
own degree settling rules. A simple usage
of information sources limit to a model,
for example, it can prompt a typical
breakdown in the binding system.
However, the complexities come down
to making sure that the names are fully
upskilled.
EIGHT

11. Do Not Forget to
Unsubscribe
There are two scenarios where
unsubscribing grows into a major risk –
First, you ignite the lifecycle hook by
yourself if it’s a service that you’ve
subscription of and second, you
stimulate the OnDestroy lifecycle hook if
it’s in a constituent that you’ve
subscribed. Keep a check on these to
avoid any complications later.
NINE

12. Declaring Everything With
Anonymous Functions
Assigning your functions and objects
accounts for a tidy and maintainable
code. This kind of well-maintained and
documented code is easy to work with
and can easily be divided into files. Not
just this, such pieces of code have an
increased testability.
This makes it easy for the developer to
maintain the application code and gives
more expressibility to the code.
TEN

13. Direct Manipulation of
DOM
This is the most common mistake that
every new Angular JS developer
commits. Whether it involves rendering
SVG or refreshing a web page’s heading
on a context changes, a developer
decides to take the easy way out and
makes changes to the DOM directly.
ELEVEN

14. Not Using $applyAsync
Because there is polling contraption to
call $digest() in AngularJS, it is just
implemented because of the subsisting
directives. $applyAsync aids a lot in
detaining the expression resolution to
the next cycle of $digest(). There is both
an automated and manual way to wield
$applyAsync.
TWELVE

15. Same Component In More
Than One NgModule
Declaring a component in multiple
NGModule-s is one of the most
recurrent mistakes among Angular
developers that end up throwing an
error right at your screen. This error
occurs because one needs to mention
each component in the scope of its own
NgModule.
THIRTEEN

16. AngularJS is an exceptional front-end framework. It’s one of the leading tools on the
web for creating single page applications. And since it is scalable and backed by
Google, you get plenty of support and guides to get you started. Developing is not
just about writing error-free code, it’s about committing an error once and never
repeating it. Instead of embracing the “fail fast, fail often” concept, one needs to
learn from the mistakes of other developers and ensure that they rarely fail. At least,
due to the same mistake.
CONCLUSION

17. HAPPY TESTING!!