---
source: crates/biome_js_analyze/tests/spec_tests.rs
expression: excessiveNesting.js
---
# Input
```jsx
function excessiveNesting() {
    function nested1() {
        function nested2() {
            function nested3() {
                function nested4() {
                    function nested5() {
                        function nested6() {
                            function nested7() {
                                function nested8() {
                                    function nested9() {
                                        function nested10() {
                                            function nested11() {
                                                function nested12() {
                                                    console.log("I can see my house from here!");
                                                }
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}

```

# Diagnostics
```
excessiveNesting.js:10:46 lint/complexity/noExcessiveCognitiveComplexity ━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ! Excessive complexity detected.
  
     8 │                             function nested7() {
     9 │                                 function nested8() {
  > 10 │                                     function nested9() {
       │                                              ^^^^^^^
    11 │                                         function nested10() {
    12 │                                             function nested11() {
  
  i Please refactor this function to reduce its complexity. It's currently too complex or too deeply nested to calculate an accurate score.
  

```