This is an error in the spelling or grammar used when coding. Missing a letter, character or forgetting to include inverted commas/speech marks are common examples of ...

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 ...

Unlike Dart, Script#, and GWT, however, TypeScript doesn't discard the syntax of JavaScript. Instead, it extends it, with the result that any JavaScript program ... to trap errors at development ...