Trying to pass a default value to an @api decorated property, somehow I get undefined variable, here is my code meta.xml

<?xml version="1.0" encoding="UTF-8"?>
<LightningComponentBundle xmlns="http://soap.sforce.com/2006/04/metadata" fqn="mroConsumptionTable">
        <targetConfig targets="lightning__AppPage">
                    label="Per slot array"
                    default="Single Rate"


 @api set type(value){
        console.log('in set type');
        this._type = value;
    get type(){
        return this._type;

If you don't have a solution for this exact code, at least do share a working example of passing a property to a component


1 Answer 1


We do something similar with the following, and I know this works. In the meta:

    <targetConfig targets="lightning__RecordPage">
        <property name="definitionName" label="Definition Name" type="String" required="true" datasource="apex://ScheduleDefinitionPickList"/>
        <property name="minimumHeight" label="Minimum Height" type="String" default="30em" required="false"/>

In the component:

 * The configured minimum height get.
 * @return {string}
@api get minimumHeight() {
    return this._minimumHeight;

set minimumHeight(value) {
    this._minimumHeight = value;
    this.state.rootStyle = value ? `min-height: ${value};` : '';

The only difference I can see is actually around where the @api is put when having get/set functions. We put it on the get, not on the set (the @api in this case can only go on one of the functions and we put it on the get).

  • unfortunately it doesn't work in my case, I need this component to be able to accept data from outer component that's why I need a setter, I wanted to use this default target property just for testing but it looks like it's easier to create another component for this purpose Jan 23, 2020 at 13:57
  • 2
    I think what phil is saying is the @api decorator just needs to be put on the get, but it will be applicable on both the get and set.
    – willard
    Jan 23, 2020 at 14:10

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