Angular 7 2 1 Es6 Class Referenceerror Cannot Access X Before Initialization

Have you encountered the "ReferenceError: Cannot access 'X' before initialization" error message when working with Angular 7? This common stumbling block can be frustrating, but fear not, as we'll walk you through what this error means and how you can resolve it.

### Understanding the Error:
When you see the "ReferenceError: Cannot access 'X' before initialization" in your Angular 7 project, it typically means that you are trying to access a variable or object before it has been properly initialized. In JavaScript, variables need to be initialized before being accessed or used.

### Common Causes:
1. Hoisting: In JavaScript, variable and function declarations are hoisted to the top of their containing scope. If you try to access a variable before it is declared, you'll encounter this error.

2. Block-Scoped Variables: With the introduction of ES6 `let` and `const`, variables are now block-scoped rather than function-scoped. This means you cannot access them before they are declared within the block scope.

### Solution:
To fix this error in your Angular 7 code, you can follow these steps:

#### 1. Check Variable Declarations:
Ensure that the variable 'X' is declared before you try to access it. Make sure it is within the correct scope and not accessed before assignment.

#### 2. Use `let` or `const` Instead of `var`:
If you are using `var` to declare variables, consider using `let` or `const` for block-scoped variables to avoid hoisting issues.

#### 3. Initialization Before Use:
Always initialize your variables before accessing them. This helps prevent any issues related to accessing variables before they are defined.

### Example:

// Incorrect code that causes ReferenceError
console.log(myVariable); // ReferenceError: Cannot access 'myVariable' before initialization
let myVariable = 42;

// Corrected code
let myVariable = 42;
console.log(myVariable); // Now it will log 42

By following these simple steps and best practices, you can easily resolve the "ReferenceError: Cannot access 'X' before initialization" in your Angular 7 project. Remember to always declare and initialize your variables properly to avoid such errors.

Hopefully, this guide has shed some light on this common error and helped you troubleshoot it effectively in your Angular 7 applications. Keep coding and happy Angular-ing!