regex101: JavaScript Match Workspace

Regular Expression

(\S*) && (\1[\.\[]).+

New

// Optional chaining for Javascript is now in stage 4:
// https://github.com/tc39/proposal-optional-chaining
// WARNING: This is NOT native to JS yet, so you will need to use a babel plugin to convert it:
// https://babeljs.io/docs/en/babel-plugin-proposal-optional-chaining

// Which means you can use this regex to find where in your codebase you can replace this:
user && user.profile && user.profile.email
// with this:
user?.profile?.email

// these should match because they have an object variable being accessed multiple times with a dot or opening bracket
data && data[query] && data[query].items && data[query].items.length > 0
const street = user.address && user.address.street;

// this should not match because they're not accessing the same object
data && form.user && api.authenticated