<rem>

The <rem> tag adds model attributes to a form. The use case is when the administrator needs to extend a record form in the agent interface. The tag must be specified in the Template field of the widget.

The following attributes are applicable:

Attribute	Type	Mandatory	Description
isUserScripts	Boolean	N	This attribute allows enabling client scripts execution. The default value is 'true'.
isPortal	Boolean	N	This attribute allows declaring that this widget should be displayed on the portal.
modelId	String	N	This attribute allows specifying RE model ID.
recordId	String	N	This attribute allows specifying an ID of an existing record to extend.
style	String	N	This attribute specifies the display settings (size, font, color, etc.) of the widget elements using the CSS syntax.
tableName	String	Y	This attribute allows specifying a table containing the extending record.

rem

<rem modelId="{data.model_id}" tableName="{data.table_name}" recordId ="{data.record_id}" />

( () => {
    window.s_widget_custom = window.s_widget_custom || {};
    const modelId = new URLSearchParams(window.location.search).get('model_id'); // Getting model id from URL
    //Setting model from model_id URL parameter so new record knows from which model to add attributes
    s_widget.setFieldValue('model_id', modelId);
    // Setting table name and record ID of existing record in order to find a model
    s_widget.setFieldValue('table_name', window.s_form.getTableName());
    s_widget.setFieldValue('record_id', window.s_form.getUniqueValue());
})();

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<rem>