Strange behavior of moments.js [duplicate]

-1

This question already has an answer here:

Javascript Date.UTC() function is off by a month?

3 answers

var now = moment({ year: 2018, month: 11, day: 9 }).format('M');

alert(now);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.2.1/moment.min.js"></script>

The expected behavior is alert shows '11' but you can see shows '12'

Someone know why?

asked Nov 22 '18 at 8:17

Juan Medina

6910

marked as duplicate by VincenzoC, jonrsharpe, adiga, Community♦ Dec 4 '18 at 12:21

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

1

Months in JavaScript (and for moment(Object)) are 0 indexed, so you are a creating a moment object that represents 2018-12-09

– VincenzoC
Nov 22 '18 at 8:21

add a comment |

-1

This question already has an answer here:

Javascript Date.UTC() function is off by a month?

3 answers

var now = moment({ year: 2018, month: 11, day: 9 }).format('M');

alert(now);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.2.1/moment.min.js"></script>

The expected behavior is alert shows '11' but you can see shows '12'

Someone know why?

asked Nov 22 '18 at 8:17

Juan Medina

6910

marked as duplicate by VincenzoC, jonrsharpe, adiga, Community♦ Dec 4 '18 at 12:21

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

1

Months in JavaScript (and for moment(Object)) are 0 indexed, so you are a creating a moment object that represents 2018-12-09

– VincenzoC
Nov 22 '18 at 8:21

add a comment |

-1

This question already has an answer here:

Javascript Date.UTC() function is off by a month?

3 answers

var now = moment({ year: 2018, month: 11, day: 9 }).format('M');

alert(now);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.2.1/moment.min.js"></script>

The expected behavior is alert shows '11' but you can see shows '12'

Someone know why?

asked Nov 22 '18 at 8:17

Juan Medina

6910

This question already has an answer here:

Javascript Date.UTC() function is off by a month?

3 answers

var now = moment({ year: 2018, month: 11, day: 9 }).format('M');

alert(now);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.2.1/moment.min.js"></script>

The expected behavior is alert shows '11' but you can see shows '12'

Someone know why?

This question already has an answer here:

Javascript Date.UTC() function is off by a month?

3 answers

var now = moment({ year: 2018, month: 11, day: 9 }).format('M');

alert(now);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.2.1/moment.min.js"></script>

var now = moment({ year: 2018, month: 11, day: 9 }).format('M');

alert(now);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.2.1/moment.min.js"></script>

javascript momentjs

asked Nov 22 '18 at 8:17

Juan Medina

6910

asked Nov 22 '18 at 8:17

Juan Medina

6910

asked Nov 22 '18 at 8:17

Juan Medina

6910

asked Nov 22 '18 at 8:17

Juan Medina

6910

asked Nov 22 '18 at 8:17

Juan Medina

6910

marked as duplicate by VincenzoC, jonrsharpe, adiga, Community♦ Dec 4 '18 at 12:21

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

marked as duplicate by VincenzoC, jonrsharpe, adiga, Community♦ Dec 4 '18 at 12:21

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

1

Months in JavaScript (and for moment(Object)) are 0 indexed, so you are a creating a moment object that represents 2018-12-09

– VincenzoC
Nov 22 '18 at 8:21

add a comment |

1

Months in JavaScript (and for moment(Object)) are 0 indexed, so you are a creating a moment object that represents 2018-12-09

– VincenzoC
Nov 22 '18 at 8:21

Months in JavaScript (and for moment(Object)) are 0 indexed, so you are a creating a moment object that represents 2018-12-09

– VincenzoC
Nov 22 '18 at 8:21

add a comment |

1 Answer
1

active

oldest

votes

The input of the month is from 0 to 11, when the output format is from 1 to 12.

var now = moment({ year: 2018, month: 0, day: 9 }).format('M');



console.log(now);



now = moment({ year: 2018, month: 11, day: 9 }).format('M');



console.log(now);



now = moment({ year: 2018, month: 12, day: 9 }).format('M');



console.log(now);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.2.1/moment.min.js"></script>

Documentation about M format

enter image description here

Documentation about Month input

enter image description here

To handle this case programmatically, you can either retrieve 1 to your month at the moment you set it or retrieve 1 at the end display.

Example :

var now = moment({ year: 2018, month: 11 - 1, day: 9 }).format('M');



console.log(now);





var now = String(Number(moment({ year: 2018, month: 11, day: 9 }).format('M')) - 1);



console.log(now);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.2.1/moment.min.js"></script>

edited Nov 22 '18 at 11:01

answered Nov 22 '18 at 8:22

Grégory NEUT

8,94321738

1

I see.... Thanks a lot.... but then what is the best way to have from var now = moment({ year: 2018, month: 11, day: 9 }) format to '2018-11-9'?

– Juan Medina
Nov 22 '18 at 10:57

@JuanMedina I've made an edit with the answer to your question

– Grégory NEUT
Nov 22 '18 at 11:01

add a comment |

1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

The input of the month is from 0 to 11, when the output format is from 1 to 12.

var now = moment({ year: 2018, month: 0, day: 9 }).format('M');



console.log(now);



now = moment({ year: 2018, month: 11, day: 9 }).format('M');



console.log(now);



now = moment({ year: 2018, month: 12, day: 9 }).format('M');



console.log(now);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.2.1/moment.min.js"></script>

Documentation about M format

enter image description here

Documentation about Month input

enter image description here

To handle this case programmatically, you can either retrieve 1 to your month at the moment you set it or retrieve 1 at the end display.

Example :

var now = moment({ year: 2018, month: 11 - 1, day: 9 }).format('M');



console.log(now);





var now = String(Number(moment({ year: 2018, month: 11, day: 9 }).format('M')) - 1);



console.log(now);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.2.1/moment.min.js"></script>

edited Nov 22 '18 at 11:01

answered Nov 22 '18 at 8:22

Grégory NEUT

8,94321738

1

I see.... Thanks a lot.... but then what is the best way to have from var now = moment({ year: 2018, month: 11, day: 9 }) format to '2018-11-9'?

– Juan Medina
Nov 22 '18 at 10:57

@JuanMedina I've made an edit with the answer to your question

– Grégory NEUT
Nov 22 '18 at 11:01

add a comment |

The input of the month is from 0 to 11, when the output format is from 1 to 12.

var now = moment({ year: 2018, month: 0, day: 9 }).format('M');



console.log(now);



now = moment({ year: 2018, month: 11, day: 9 }).format('M');



console.log(now);



now = moment({ year: 2018, month: 12, day: 9 }).format('M');



console.log(now);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.2.1/moment.min.js"></script>

Documentation about M format

enter image description here

Documentation about Month input

enter image description here

To handle this case programmatically, you can either retrieve 1 to your month at the moment you set it or retrieve 1 at the end display.

Example :

var now = moment({ year: 2018, month: 11 - 1, day: 9 }).format('M');



console.log(now);





var now = String(Number(moment({ year: 2018, month: 11, day: 9 }).format('M')) - 1);



console.log(now);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.2.1/moment.min.js"></script>

edited Nov 22 '18 at 11:01

answered Nov 22 '18 at 8:22

Grégory NEUT

8,94321738

1

I see.... Thanks a lot.... but then what is the best way to have from var now = moment({ year: 2018, month: 11, day: 9 }) format to '2018-11-9'?

– Juan Medina
Nov 22 '18 at 10:57

@JuanMedina I've made an edit with the answer to your question

– Grégory NEUT
Nov 22 '18 at 11:01

add a comment |

The input of the month is from 0 to 11, when the output format is from 1 to 12.

var now = moment({ year: 2018, month: 0, day: 9 }).format('M');



console.log(now);



now = moment({ year: 2018, month: 11, day: 9 }).format('M');



console.log(now);



now = moment({ year: 2018, month: 12, day: 9 }).format('M');



console.log(now);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.2.1/moment.min.js"></script>

Documentation about M format

enter image description here

Documentation about Month input

enter image description here

To handle this case programmatically, you can either retrieve 1 to your month at the moment you set it or retrieve 1 at the end display.

Example :

var now = moment({ year: 2018, month: 11 - 1, day: 9 }).format('M');



console.log(now);





var now = String(Number(moment({ year: 2018, month: 11, day: 9 }).format('M')) - 1);



console.log(now);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.2.1/moment.min.js"></script>

edited Nov 22 '18 at 11:01

answered Nov 22 '18 at 8:22

Grégory NEUT

8,94321738

The input of the month is from 0 to 11, when the output format is from 1 to 12.

var now = moment({ year: 2018, month: 0, day: 9 }).format('M');



console.log(now);



now = moment({ year: 2018, month: 11, day: 9 }).format('M');



console.log(now);



now = moment({ year: 2018, month: 12, day: 9 }).format('M');



console.log(now);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.2.1/moment.min.js"></script>

Documentation about M format

enter image description here

Documentation about Month input

enter image description here

To handle this case programmatically, you can either retrieve 1 to your month at the moment you set it or retrieve 1 at the end display.

Example :

var now = moment({ year: 2018, month: 11 - 1, day: 9 }).format('M');



console.log(now);





var now = String(Number(moment({ year: 2018, month: 11, day: 9 }).format('M')) - 1);



console.log(now);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.2.1/moment.min.js"></script>

var now = moment({ year: 2018, month: 0, day: 9 }).format('M');



console.log(now);



now = moment({ year: 2018, month: 11, day: 9 }).format('M');



console.log(now);



now = moment({ year: 2018, month: 12, day: 9 }).format('M');



console.log(now);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.2.1/moment.min.js"></script>

var now = moment({ year: 2018, month: 0, day: 9 }).format('M');



console.log(now);



now = moment({ year: 2018, month: 11, day: 9 }).format('M');



console.log(now);



now = moment({ year: 2018, month: 12, day: 9 }).format('M');



console.log(now);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.2.1/moment.min.js"></script>

var now = moment({ year: 2018, month: 11 - 1, day: 9 }).format('M');



console.log(now);





var now = String(Number(moment({ year: 2018, month: 11, day: 9 }).format('M')) - 1);



console.log(now);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.2.1/moment.min.js"></script>

var now = moment({ year: 2018, month: 11 - 1, day: 9 }).format('M');



console.log(now);





var now = String(Number(moment({ year: 2018, month: 11, day: 9 }).format('M')) - 1);



console.log(now);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.2.1/moment.min.js"></script>

edited Nov 22 '18 at 11:01

answered Nov 22 '18 at 8:22

Grégory NEUT

8,94321738

edited Nov 22 '18 at 11:01

answered Nov 22 '18 at 8:22

Grégory NEUT

8,94321738

answered Nov 22 '18 at 8:22

Grégory NEUT

8,94321738

answered Nov 22 '18 at 8:22

Grégory NEUT

8,94321738

1

I see.... Thanks a lot.... but then what is the best way to have from var now = moment({ year: 2018, month: 11, day: 9 }) format to '2018-11-9'?

– Juan Medina
Nov 22 '18 at 10:57

@JuanMedina I've made an edit with the answer to your question

– Grégory NEUT
Nov 22 '18 at 11:01

add a comment |

1

I see.... Thanks a lot.... but then what is the best way to have from var now = moment({ year: 2018, month: 11, day: 9 }) format to '2018-11-9'?

– Juan Medina
Nov 22 '18 at 10:57

@JuanMedina I've made an edit with the answer to your question

– Grégory NEUT
Nov 22 '18 at 11:01

I see.... Thanks a lot.... but then what is the best way to have from var now = moment({ year: 2018, month: 11, day: 9 }) format to '2018-11-9'?

– Juan Medina
Nov 22 '18 at 10:57

@JuanMedina I've made an edit with the answer to your question

– Grégory NEUT
Nov 22 '18 at 11:01

add a comment |

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