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Blog Post:
https://www.infallibletechie.com/2024/10/salesforce-lightning-web-component-date-validation.html
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hello everyone in this video we are
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going to see date validation in
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Salesforce lightning web
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component for example here in this start
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date selection if I select any
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date which is not Monday it will throw
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me a validation error for example I'm
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selecting OCT oober 1st which is uh
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Tuesday it will throw me an error
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stating that start date should be Monday
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so I have to make sure I have to select
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a date which is Monday so I'm selecting
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7th October so it will not throw me an
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error it will allow me to select the
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particular date it was I was able to
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select this date because the date is
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Monday in the end date if I select uh uh
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a date which is uh less than start date
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it will throw me an error for example
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here I'm selecting 1st September Which
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is less than the start date so it will
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throw me an error stating that end date
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should be greater than start
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date one more validation what I have
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done here is I have selected October
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7th um and uh now it should throw me an
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error if I
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select October 11 because I don't want
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to select 5 days it should be 14 days
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apart and it should be mult but and it
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should be um uh it should be 14 days
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apart or 28 days like that it should be
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in multiples of uh 2 weeks apart for
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example here since I have selected
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October 7th it will allow me to select
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October 18th because it is 2 weeks apart
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no issues but if I select October 11th
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it is not uh two weeks apart so it will
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throw me an error saying that end date
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should be Friday and different should be
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in multiples of two weeks apart so this
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is my validation for example here if I
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select 25 it is 3 weeks apart so it will
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not allow me to select if I select
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first
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um November it will allow me because it
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is in it is four weeks apart and then it
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is M and then it is in in uh it is like
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four weeks apart so it will allow me to
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s
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so this is the validation rule um sorry
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this is the lightning web component
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which I have developed for this date
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validations so I am I'm using two dates
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one for start date and the other one is
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for end
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date I will
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explain uh only the start date
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validation you can definitely go through
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the end date validation which is kind of
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huge and um it will be somewhat uh
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easier to understand if you understand
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the start date validation so
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whenever the date is changed it will
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call this handle change method first I'm
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checking whether it is start date or it
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is end date if it is start
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date I'm setting the selected date which
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is a variable in JavaScript to new date
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of even. target.
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value I'm doing this so that it will
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convert the date into my current uh time
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zone I'm getting the time offset using
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get time zone offset method from
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JavaScript and then I'm finding the
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difference I'm multiplying that by
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60,000 and then I'm adding it to the
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current daytime I wanted to do all the
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validation in gmtr UTC so that that is
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the reason I'm finding the offset
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multiplying by 60,000 and then adding it
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to the date using JavaScript get day
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method and finding out what is the day
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value if it is one then it is definitely
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Monday so it will allow me to set the
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value if I select any other date other
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than one day it will throw me an error
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it will set my start date to null end
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date to null and I'm using set timeout
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to set the start date and end date to
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null because I wanted uh the values on
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the HTML to be uh updated so I'm using a
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set timeout so that it will be
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reactive if they haven't selected this
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uh uh start date uh I am setting the
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start date value and end date value to
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null same way I'm using set time out to
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set the values to null for example here
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if I select if I um remove it it should
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remove the end date also so I'm making
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sure I'm I'm removing the end date and
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as well as the start date value to
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null same way I'm doing it for end date
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also you can go through this um in order
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to get the sample JavaScript code and or
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the entire liting web component code for
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your reference please check the video
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description in the video description I
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have shared my blog post from the blog
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post you should be able to get this
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complete sample code for your
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reference I hope it was
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helpful thank you for
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watching e
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