Reading-Notes

Class 09: - Error Handling & Debugging

• JavaScript book, Ch. 10, “Error Handling & Debugging”(pg.456-492)

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Error Handling & Debugging

• Execution context: every statement has 3 execution contexts

  ```

  1. global context

1. function context

2. eval context

```

• variable scope: also corresponds with global context and function context. A variable that is within a function is local not global. A variable that is outside the function is global.

• stacking: when a statement needs data from another function it stacks the new function on top of the current task.

• Exception: points in your code that the interpreter stops and looks for exception-handling code.

• debugging: is the process of finding errors in your code and fixing them.

JavaScript has 7 different types of errors. Each Creates its own object, which can tell you its line number and gives a description of the error.

you can use try, catch, finally statements in areas areas in your code you’re expecting an error