Use formula suggestions or Function Wizard to avoid syntax errors. Manually check for any typo in the function and correct it. Check if the name used in the formula is defined in Name Manager.

Next, I validated the script using Tampermonkey’s Run syntax check toolbar button. With no errors found, I then saved the script.

Revise including normal, exceptional and extreme test data in a test plan to reduce syntax, logic and execution errors, for National 5 Computing Science ...

We rather fear that live syntax validation as you hand-code HTML is one answer to this, but on its own isn't sufficient. But we really wish it were – and we would be very happy to be wrong.

Fixing syntax errors is simple. Spotting them is more difficult. Some of the most common syntax errors are things that come in pairs.