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URL Parameters in Community page to Lightning Component [AURA/LWC/FLOW]

By looking at the topic, you might be thinking, there would be some extensive JS coding behind it as we’ll need to pass param from the community to the aura/lwc component or flow.

But, It is actually much easier to pass URL parameters to Lightning components in a community page.

The “trick” is to expose your attributes at design time to the page, so they show up in the Lightning page designer as component properties.

Example of AURA:

You do that in the design definition (the .design file):

<design:component label="Sample">
   <design:attribute name="someParam" label="Make Parameters great again" />
</design:component>

This presumes that you component has a parameter someParam in its attribute definition (in the .cmp file):

<aura:component implements="forceCommunity:availableForAllPageTypes" access="global" controller="someController">
    <aura:attribute name="someParam" type="String" />
    .... stuff here ...
</aura:component>

Real Magic

Let’s presume your URL looks like ....?color=blue then you add into the property value of your component after you dragged it onto the lightning page in community builder:

 {!color}

This will pull the value of the color URL parameter and hand it to the someParam attribute of your component. No JS is required.

NOTE: Passing URL parameters using component properties is not officially supported and only works on a full page load (which is slow).

Hope that helps

Source: https://salesforce.stackexchange.com/questions/165650/getting-the-url-parameter-into-lightning-component-using-the-paramname-exp

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