July 2018
Beginner to intermediate
458 pages
9h 58m
English
Content preview from Learning Salesforce Lightning Application Development
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Passing data down the component hierarchy
To pass data down the hierarchy, you need to define attributes in child components, and then pass the attribute values from the parent component.
The parent component code is as follows:
<aura:component> <aura:attribute name="parentAttribute" type="String"/> <c:childComponent childAttribute="{!v.parentAttribute}"/></aura:component>
The child component code is as follows:
<aura:component> <aura:attribute name="childAttribute" type="String"/> </aura:component>
This way of passing data from the child to the parent is expensive when it comes to performance. Leverage the aura methods covered in the next section.
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