Cell 2

if(typeof $ !== 'undefined') {
    $.async()

    d3TreeToSVG([
        {
            name: '@angular/core'
        },
        {
            name: 'app.component'
        },
        {
            name: 'login.component'
        }
    ], [
        {
            source: '@angular/core',
            target: 'app.component'
        },
        {
            source: '@angular/core',
            target: 'login.component'
        }

    ])
        .then(svg => $.svg(svg))
        .catch(e => $.sendError(e));
}

What the code could have been:

// Import required libraries
import $ from 'jquery';
import d3TreeToSVG from './d3TreeToSVG'; // assuming this is a custom function in the same directory

try {
    // Check if the $ object is defined and has an async method
    if ($.async && typeof $.async === 'function') {
        // Call the async method
        $.async();

        // Call the d3TreeToSVG function with the provided data
        d3TreeToSVG([
            { name: '@angular/core' },
            { name: 'app.component' },
            { name: 'login.component' }
        ], [
            { source: '@angular/core', target: 'app.component' },
            { source: '@angular/core', target: 'login.component' }
        ])
           .then(svg => {
                // Check if the svg object is defined and has a method
                if (svg && $.svg && typeof $.svg === 'function') {
                    // Call the svg method with the provided svg data
                    $.svg(svg);
                } else {
                    console.error('Invalid SVG data or $ object');
                }
            })
           .catch(e => {
                // Check if the $ object has a method to handle errors
                if ($.sendError && typeof $.sendError === 'function') {
                    // Call the sendError method with the provided error data
                    $.sendError(e);
                } else {
                    // If the $ object does not have a sendError method, log the error to the console
                    console.error(e);
                }
            });
    } else {
        // If the $ object is not defined or does not have an async method, log an error to the console
        console.error('Invalid $ object or async method');
    }
} catch (e) {
    // Catch any other errors and log them to the console
    console.error(e);
}

if(typeof $!== 'undefined')

$.async()

d3TreeToSVG([...], [...]).then(svg => $.svg(svg)).catch(e => $.sendError(e));