Create csv from json and send it by mail Angular

I have an Angular 6 application that lists a Json object.
I want to put a field where the user enters his mail and automatically send that Json object converted to Csv as an attachment to his mail

I did this but I think that the matter is not there

const json = [
        {
            titulo: 'titulo 1',
            descripcion: 'descripcion 1',
            precio: 1431
        },
        {
            titulo: 'titulo 2',
            descripcion: 'descripcion 2',
            precio: 1431
        },
        {
            titulo: 'titulo 3',
            descripcion: 'descripcion 1',
            precio: 1431
        },
    ];
    const replacer = (key, value) => value === null ? '' : value;
    const header = Object.keys(json[0]);
    let csv = json.map(row => header.map(fieldName => JSON.stringify(row[fieldName], replacer)).join(','));
    csv.unshift(header.join(','));
    csv = csv.join('\r\n');
    console.log(csv);

What it shows me in console is this

But now how do I convert it to a CSV file and attach it to an email?

Or some other solution

I'm working with Angular and PHP

Thanks:)