Questions tagged as 'escopo-de-variáveis'

The following code "prints" 50 times the text "Message 50" in a textarea . for (var i = 0; i < 50; i++) { setTimeout(function() { textArea.value += 'Mensagem ' + i + '\n'; textArea.scrollTop = textArea.scrollHeig...

What are lexical scope and dynamic scope and what are their main differences?     

Since the word let was introduced in ECMAScript I have only heard about it, so far I have not seen any practical examples and to be honest I do not know very well what a let variable is and how it behaves. The only thing I unders...