Semicolon (;) in ECMAScript 6 is no longer needed? [duplicate]

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When using ECMAScript 6 (ES6) is it no longer necessary to use a semicolon (;) at the end of each line of code?

    
asked by anonymous 29.12.2016 / 18:03

2 answers

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The semicolon (semicolon) was never mandatory at the end of lines, its use is another, it is meant to separate expressions that are on the same line or within a for .

Note that in JavaScript line breaks also have a separating effect, see: 

var i = 0; i++ // ponto e virgula é obrigatório

var i = 0      // ponto e virgula é opcional pois estão em linhas diferentes
    i++
  

Note ¹: for has 3 expressions as explained by @Sergio and therefore requires two ; : 

for ([inicialização]; [condição]; [expressão ao final de cada loop])
     

for does not use ; when using in (unless you wanted to add expressions for additional operations): 

for ([variável] in [objeto que terá as propriedades iteradas])
     

or of : 

for ([variável] of [objeto que terá os valores iterados])
     

Note ²: This occurs in other languages too

Sources:

29.12.2016 / 18:08
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Does not have to do with ES6 use or not comma or not, is "a matter of religion" :)
That is: It's a question of code style.

; is a symbol with JavaScript functionality, that of separating statements , in some cases it can not be ignored, for example: for (var i = 0; i < 10; i++) , but at the end of the line it is optional, since that there is a line break.

    
29.12.2016 / 18:11
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