How to get a property from file.js-meta.xml (which is in LWC) in the Apex using page layout

Question

I need to pass a property that I will write (I think it can be called custom) from js-meta.xml a file in the Apex handler class. The question is how to read/receive it in the Apex using page layout (this is a prerequisite and means Layout Class : https://developer.salesforce.com/docs/atlas.en-us.232.0.apexref.meta/apexref/apex_class_Metadata_Layout.htm#apex_Metadata_Layout_summaryLayout or something related to it). There is a question on a similar topic : Programmatically set parameter on LWC?, but it doesn't help me.

Let me clarify again: I need to somehow get the values of these properties in the Apex handler class (after installing LWC on the page) using page layout (if possible). Need detailed advice

I edited the question, posted the entire file.js-meta.xml

<?xml version="1.0" encoding="UTF-8"?>
<LightningComponentBundle xmlns="http://soap.sforce.com/2006/04/metadata">
    <apiVersion>52.0</apiVersion>
    <isExposed>true</isExposed>
    <targets>
        <target>lightning__RecordPage</target>
        <target>lightning__AppPage</target>
        <target>lightning__HomePage</target>
    </targets>
    <targetConfigs>
        <targetConfig targets="lightning__RecordPage,lightning__AppPage,lightning__HomePage">
            <property label="LabelName" name="name" type="String" required="true" datasource="value1,value2,value3" default="value1"/>
            <property label="LabelName2" name="name2" type="String" required="true"/>
        </targetConfig>
    </targetConfigs>
</LightningComponentBundle>

Answer 1

If I understand correctly, you've got an LWC that you're exposing properties for in the xml so that whoever is filling that sets variables in the LWC, and then you're looking to pass those variables back to Apex and handle them in some way. If this is the case, the Layout Class is not what you're looking for; you're going to want to use the Wire Service or call your Apex methods imperatively. Full root documentation of calling Apex from LWC is here.

Basically, when you open up a property in the xml like that, you need a corresponding JavaScript variable annotated with @api, which you can then use in your LWC. From there, you can pass that variable to an Apex method and handle it accordingly. Here's more info on the XML Configuration File. An example of how to do this is shown on the Salesforce Diaries site (not official Salesforce). I would also have another look at that second link you gave because this is what that question is addressing - it may make sense now that you know this is only part of what you want to do and not the full picture.