Code changes when I save the file in visual studio code

Today, when I tried to save my file, the code was completely scrambled. I've been using this file for a couple weeks now and this has never happened before. Does anyone know what's going on here?

Here's the before:

Here's the after:

And it's not just the look, but also the code. It's full of errors.

I've also added code chunks:

BEFORE:

    async function listEmails() {
            let response;
            try {
                response = await gapi.client.gmail.users.messages.list({
                    'userId': 'me',
                });
            } catch (err) {
                document.getElementById('content').innerText = err.message;
                return;
            }
            const emails = response.result.messages;
            if (!emails || emails.length == 0) {
                document.getElementById('content').innerText = 'No emails found.';
                console.log('No emails found.');
                return;
            }
            // Flatten to string to display
            const output = emails.reduce(
                (str, email) => `${str}${email.name}\n`,
                'Emails:\n');
            document.getElementById('content').innerText = output;
        }

AFTER:

    async f        Emails() {
            let response;
            try {
            response = await gapi.client.gmail.users.messages.list({
                'userId': 'm                            } catch (err) {
                document.getElementById                t = err.message;             ret             }
                     = response.result.messages;
            if (!emails || email            
               um        ntById('content').innerText = 'No emails                      console.log('No emails f                     return;
            }
            // Flatten to string to                 const output = emails.reduce(             (str, e        st        me}\n`,
                'Emails:              document.getElementById(            Text = output;
        }