reading-notes

Reading Class 10 In memory storage

Why is this important?

• Understanding the JS Call stack is important for function invocation order, debugging and preventing stack overflow.

• Reference errors tell the dev what exactly is wrong.

Understanding the JavaScript Call Stack

1. A ‘call’ is the same thing as invoking a function.

2. Synchronous functions are invoked one at a time.

3. Last In First Out. “The last function that gets pushed into the stack is the first one out when the function returns” source

4. 

5. “A stack overflow occurs when there is a recursive function (a function that calls itself) without an exit point. The browser (hosting environment) has a maximum stack call that it can accomodate before throwing a stack error.” source

JavaScript error messages

1. Reference error: Trying to use a variable that isn’t dclared yet.

2. Syntax error: There is an error in the syntax…

3. Type error: When the datatype of whatever you are trying to use isn’t compatible.

4. A breakpoint is a line in the code that stops the application from running past it inorder to debug.

5. Creates a breakpoint.