CODEWITHSUNDEEP
javascriptmomentjs
TheWebs
TheWebs

Reputation: 12923

Check if string is date or not using Moment.js

So consider the following object:

You might be thinking, the easiest way is too loop over the object, check if each property is valid. as you can see we have one date object in this object. But pay attention to that clinic_id.

Here's my code to do what I mentioned above:

  for(let property in formData) {
    let date = moment(formData[property]).isValid()

    if (date) {
      formData[property] = moment(formData[property]).format('YYYY-MM-DD');
    }
  }

You would think this might work, heck you might even suggest to loop through looking to see what .getDate() on each property would say, except .getDate() will throw an error on anything not a date object.

So what does the code above output:

The only thing in here that should be a date value is date_of_consent not clinic_id. I understand why moment converted it to a date but it should not have happened.

I will have objects that have date objects in them, is there a way for me to find said date object in an object and replace it with a moment.js formatted one?

Upvotes: 1

Views: 1292

Answers (1)

Dimitri Mockelyn
Dimitri Mockelyn

Reputation: 1545

You can check if you have Date objects in multiple ways.

You could check the instance of every item to check if it's a Date :

if (formData[property] instanceof Date) // returns true or false

You could also check if the function .getDate() exists :

typeof (formData[property]).getDate === 'function'

Or try to get the value and catch the possible error :

try {
    var date = formData[property].getDate();
    /* Do your formatting */
} catch (e) {
    //This was not a Date object
}

Upvotes: 1

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