Open the REPL and execute:
```
function f() {}
```
Then, start typing `f`. It will get a green squiggle with "variable has not been declared". Continue typing and execute `f()`. The call will succeed, but the function name in REPL log will still be squiggled. It won't go away until another command is executed.
```
function f() {}
```
Then, start typing `f`. It will get a green squiggle with "variable has not been declared". Continue typing and execute `f()`. The call will succeed, but the function name in REPL log will still be squiggled. It won't go away until another command is executed.