Troubleshooting Common Issues in Angular CLI

If you’ve started learning Angular for your Angular Certification, you’ve probably heard about Angular CLI. What is Angular CLI? This robust command-line interface streamlines the process of creating and administering Angular apps, making it a must-have tool for developers. However, it is not immune to hitches and bugs, just like any other software. In this blog, we’ll dive into the realm of Angular CLI and look at some of the most frequent problems that developers face.

Table of Contents

·       Understanding Angular CLI

·       Problems with Installation

·       Confusion over Versions

·       Strange Error Messages

·       ng serve Not Served

·       Dependencies Are Missing

·       Compilation Time Is Long

·       CORS Concerns

·       Dependency Hell

.       Conclusion

Understanding Angular CLI

Before we delve into debugging, let’s quickly review “What is Angular CLI?” for those who are new to the game. Angular CLI, which stands for Command Line Interface, is a suite of command-line tools given by Angular to help with development. With easy, straightforward instructions, it provides scaffolding, building, testing, and deployment capabilities. Angular CLI is your trusted partner, automating many of the tiresome processes and configuration settings, whether you’re beginning a new project or managing a current one.

Problems with Installation

So, you’re anxious to get started with Angular and issue the command ng new my-app. But what exactly is this? Is it an error message? Installation difficulties are one of the most prevalent stumbling hurdles. This may vary from mismatched Node.js versions to incompatibilities with other global packages. To address this, use a suitable Node.js version, update your npm, and try using a package manager like Yarn to install Angular CLI globally, which may occasionally resolve version problems.

Confusion over Versions

Staying current is critical in the ever-changing world of web development. Angular CLI, like any other tool, is updated on a regular basis. If your application stops working after an update, you may also need to update your project’s dependencies. Version incompatibilities between Angular CLI and your project’s Angular dependencies might cause confusing warnings. The command ng update may save the day by automatically upgrading your project to the most recent Angular version.

Strange Error Messages

As a developer, you’ll rapidly acquire used to analyzing cryptic error messages. Angular CLI sometimes generates error messages that may leave you perplexed. These alerts are often caused by configuration errors or a lack of dependencies. The trick here is to remain calm. Consult the official Angular CLI documentation, Google the problem message, or contact the active Angular community for assistance. Someone else has probably faced the same problem and solved it.

ng serve Not Served

You’ve updated your code and are ready to see the results, but when you run ng serve, your application stubbornly refuses to update. This vexing problem may be caused by a variety of factors, including browser cache, wrong setups, or even a malfunctioning code snippet. Clear your browser cache first, then double-check your configuration files (such as angular.json) and inspect your code for any logical issues that may impede live updates.

Dependencies Are Missing

To perform properly, Angular CLI depends on a number of dependencies and modules. When you clone or share a project with others, you may encounter problems due to missing dependencies. Running npm install or yarn install in the root directory of your project should remedy these issues by obtaining the necessary packages. Keep in mind that .Package-lock and json.JSON files are kept up to date.

Compilation Time Is Long

Angular CLI is intended to streamline your development workflow, yet the compilation process may be excruciatingly sluggish at times. This is extremely aggravating while working on a huge project. Consider utilizing Angular CLI’s Ahead-of-Time (AOT) compilation, which precompiles your templates and lowers runtime cost, to speed things up. Furthermore, improving your computer’s hardware or utilizing a solid-state drive (SSD) may drastically reduce compilation times.

CORS Concerns

Cross-Origin Resource Sharing (CORS) difficulties may arise when creating apps that interface with APIs. These difficulties often display as errors in the console of your browser, stopping your application from performing API queries. To circumvent CORS constraints, set up CORS on your server-side application or utilize proxy settings in Angular CLI to redirect requests via your development server.

Dependency Hell

Integrating numerous third-party libraries and packages into your project is expected in modern web development. Managing these dependencies, on the other hand, might seem like walking a tightrope over a pit of snakes. Keep version conflicts in mind, and use tools like npm-check or yarn-upgrade-interactive to help you traverse the dependency jungle and keep your project in sync.


You will undoubtedly confront difficulties in your quest for Angular Certification and web development expertise. However, with the troubleshooting techniques and solutions covered in this blog article, you’ll be well-equipped to deal with frequent Angular CLI difficulties. Remember that perseverance and a curious mind are your best friends in the field of growth. So, keep coding, learning, and creating incredible Angular apps. Have fun coding!

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