Script — CS1_validate_dates.js

Copy this script into ServiceNow under application x_786686_hr_leave (Australia). Table/API names already use the current scope.

Source: src/client/client_scripts/CS1_validate_dates.js

/**
 * Client Script: CS1 - Validate Dates
 * Application: Custom · Scope: x_786686_hr_leave · sys_id: c84db0e8839f0b509f02b0d6feaad3c9
 * Table:  x_786686_hr_leave_req_v2
 * Type:   onChange
 * Field:  u_end_date
 *
 * Shows an error if end date is before start date.
 */
function onChange(control, oldValue, newValue, isLoading, isTemplate) {
    if (isLoading || newValue === '') return;

    var start = g_form.getValue('u_start_date');
    var end = g_form.getValue('u_end_date');
    if (!start || !end) return;

    if (end < start) {
        g_form.showFieldMsg('u_end_date', getMessage('End date cannot be before start date'), 'error');
        g_form.clearValue('u_end_date');
    } else {
        g_form.hideFieldMsg('u_end_date', true);
    }
}