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js trailing commas

Armandres answered on May 21, 2020 Popularity 5/10 Helpfulness 1/10

answer js trailing commas

related trailing comma javascript

js trailing commas

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const array = [24, 34, 35, 24, , , , 45];

console.log(array);
console.log(array.length)
// Response: [ 24, 34, 35, 24, <3 empty items>, 45 ]
// 8

Popularity 5/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: javascript trailing

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Contributed on Aug 29 2022

Armandres

0 Answers Avg Quality 2/10

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trailing comma javascript

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Trailing commas (sometimes called "final commas") can be useful when adding
new elements, parameters, or properties to JavaScript code.
If you want to add a new property, you can simply add a new line without
modifying the previously last line if that line already uses a trailing comma.
This makes version-control diffs cleaner and editing code might be less
troublesome.

//For arrays
var arr = [
  1, 
  2, 
  3, 
];

arr; // [1, 2, 3]
arr.length; // 3

//For objects
var object = { 
  foo: "bar", 
  baz: "qwerty",
  age: 42,
};

Popularity 9/10 Helpfulness 3/10 Language javascript

Source: developer.mozilla.org

Tags: trailing javascript java

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Contributed on May 21 2020

Flyhouse_Squarewheel

0 Answers Avg Quality 2/10

trailing comma javascript

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Trailing comma is allowed in an array, object and function parameters. 
Now, this isn’t huge but it’s nice if in case we forget to close off or 
rather end a comma if we’re listing a bunch of items it doesn’t matter 
if we include that final extra one.

var list = [
    "one",
    "two",
    "three",   // It is valid
];

var obj = {
    one: "1",
    two: "2",
    three: "3", //  It is valid
}

function add(
    one,
    two,
    three, // It is valid
) {}

Popularity 6/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: javascript trailing

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Contributed on Jun 20 2022

Rasel Ahmed

0 Answers Avg Quality 2/10

js trailing commas

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