How to fix JavaScript heap out of memory error in Angular ?

How to fix JavaScript heap out of memory error in Angular ?

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Understanding the Error

The “JavaScript Heap Out of Memory” error indicates that your Node.js process has exhausted the available memory, causing it to fail. This can happen during various operations, such as building, testing, or running Angular applications, especially if the operation is resource-intensive.

Common Causes

1. Large or Complex Angular Applications: Applications with a large number of modules or dependencies can consume significant memory during the build process.
2. Memory Leaks: Memory leaks in the application code or build tools can lead to excessive memory usage.
3. Inefficient Build Configuration: Misconfigured build settings or inefficient use of build tools can increase memory consumption.

Solutions to Fix the Error

1. Increase Node.js Memory Limit

By default, Node.js limits the amount of memory a process can use. You can increase this limit using the --max-old-space-size flag.

Example:

node --max-old-space-size=4096 ./node_modules/@angular/cli/bin/ng build