Select a Sublist Line

We can use record.selectLine(options) to select a sublist line.

Method Description	Selects an existing line in a sublist. (dynamic mode only) When working in standard mode, set a sublist field using Record.setSublistValue(options).
Returns	record.Record
Supported Script Types	Client and server scripts
Governance	None
Module	N/record Module
Sibling Object Members	Record Object Members

Parameters

Parameter	Type	Required / Optional	Description
options.sublistId	string	required	The internal ID of the sublist.This value is displayed in the Records Browser.
options.line	number	required	The line number to select in the sublist. Note that line indexing begins at 0 with SuiteScript 2.0.

Errors

Error Code	Thrown If
SSS_INVALID_SUBLIST_OPERATION	A required argument is invalid or the sublist is not editable.
SSS_MISSING_REQD_ARGUMENT	A required argument is missing or undefined.

Syntax

// Add additional code.
...
var lineNum = objRecord.selectLine({
    sublistId: 'item',
    line: 3
});
...
// Add additional code.

Example
// Load the Sales Order record
let salesOrderRecord = record.load({
                type: record.Type.SALES_ORDER,
                id: salesOrderId, //Internal id of the sales order
                isDynamic: true           
});

// Select the first line in the 'item' sublist
salesOrderRecord.selectLine({
                sublistId: 'item',
                line: 0
});