Can someone please explain the process of including options in a dropdown menu using Angular 2?

In my dropdown menu, I have the months of the year translated using a pipe syntax like this: {{'January' | translate}}

I am looking to bind these translated months in my dropdown. Below is the HTML and the object containing the months:

<select class="small">
    <option selected="selected">--{{ 'Year' | translate | capitalize }}--</option>
    <option *ngFor=".."></option>
</select>



public MONTH_TRANSLATION = {
    1: 'January',
    2: 'February',
    3: 'March',
    4: 'April',
    5: 'May',
    6: 'June',
    7: 'July',
    8: 'August',
    9: 'September',
    10: 'October',
    11: 'November',
    12: 'December'
};

Answer №1

In the realm of Angular 2, one cannot directly iterate over an object using *ngFor. But fear not, for there are workarounds that can save the day.

1.) One option is to map the object to an array of values and then utilize *ngFor to loop through that array. While this approach may not provide direct access to the keys, it gets the job done. If you require access to both the keys and values, on to option number two.

2.) Create an array of the object's keys by doing something like

let keys = Object.keys(MONTH_TRANSLATION)
Then you can use *ngFor to sweep through the array of keys, and subsequently employ each key to retrieve its corresponding value. Be mindful that the order in which Object.keys() returns your keys is not guaranteed, so it might be prudent to sort the array of keys post retrieval to ensure your peace of mind.

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