Compare two string dates in typescript

In this typescript tutorial, we will see different methods of how we can compare two string dates in typescript. Here are the methods we are going to cover

Here we will see an example of how to compare two date strings in typescript.

• strict equality check with getTime ()
• abstract equality check with getTime ()
• Greater than check(>)
• Less than check(<)

Using Strict equality check compare two string dates in typescript

Here we will see an example to compare to date strings by using a Strict equality check in typescript.

For example, we will see an example to compare two string dates in a typescript with strict equality check

In the ToCompareString.ts file, write the below code:

const firstDate = new Date('2021-05-10')
const secondDate = new Date('2021-05-10')

console.log(firstDate.getTime())
console.log(secondDate.getTime())

function dateComparison() {

  //  Strict equality check
  if (firstDate.getTime() === secondDate.getTime()) {
    console.log('Dates are the same')
  } else {
    console.log('Date are not the same')
  }
}


dateComparison() 

To compile the code and run the below command and you can see the result in the console.

ts-node ToCompareString

This is an example of comparing two string dates in typescript.

Using Abstract equality check compare two string dates in typescript

Here we will compare two string dates using abstract equality check in typescript.

For example, we have two string dates and then we will cover it to the date type by using a new Date(). Then we will compare these two converted dates by checking the abstract equality and getTime().

Here is the getTime () will return the count of milliseconds since the timestamp, which is declared as midnight at the start of January 1, 1970, UTC. This method may be used to assist in the assignment of a date and time to another Date object

In the ToCompareString.ts file, write the below code:

const firstDate = new Date('2021-05-10')
const secondDate = new Date('2021-05-10')

console.log(firstDate.getTime())
console.log(secondDate.getTime())

function dateComparison() {


  if (firstDate.getTime() == secondDate.getTime()) {
    console.log('Dates are the same')
  } else {
    console.log('Date are not the same')
  }
}


dateComparison()

To compile the code and run the below command and you can see the result in the console:

ts-node ToCompareString

This is an example of Using Abstract equality check to compare two string dates in typescript.

Also, check out, How to remove quotes from a string in Typescript

Using greater than check compare two string dates in typescript

Here we will compare two string dates using the greater than check method in typescript.

For example, we will take two date strings and then we will convert the two dates of string type into date type in typescript. Then we will check which date is greater using the greater than the operator.

In the ToCompareString.ts file, write the below code:

const firstDate = new Date('2021-05-15')
const secondDate = new Date('2021-05-12')

// console.log(firstDate.getTime())
// console.log(secondDate.getTime())

function dateComparison() {

 
  if (firstDate> secondDate) {
    console.log('firstDate is greater than SecondDate')
  } else {
    console.log('firstDate is not greater than SecondDate')
  }
}


dateComparison() 

To compile the code and run the below command and you can see the result in the console:

ts-node ToCompareString

This is an example of how we can compare two string dates in typescript using the greater than operator.

Using less than check compare two string dates in typescript

Here we will compare two string dates using the less-than-check method in typescript.

For example, we will take two date strings and then we will convert the two dates of string type into date type in typescript. Then we will check which date1 is less than date 2 using the less than the operator.

In the ToCompareString.ts file, write the below code:

const firstDate = new Date('2021-05-11')
const secondDate = new Date('2021-05-12')

// console.log(firstDate.getTime())
// console.log(secondDate.getTime())

function dateComparison() {

  // 1. Abstract equality check
  if (firstDate< secondDate) {
    console.log('firstDate is less than SecondDate')
  } else {
    console.log('firstDate is not less than SecondDate')
  }
}


dateComparison() 

To compile the code and run the below command and you can see the result in the console:

ts-node ToCompareString

This is an example of how we can compare two string dates in typescript using the less than operator.

Conclusion

In this typescript tutorial, we saw different methods to compare two date strings in typescript. Here are the methods we covered:

• strict equality check with getTime ()
• abstract equality check with getTime ()
• Greater than check(>)
• Less than check(<)

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• How to compare two strings in typescript
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