It is often discussed where should one store authentication or other sensitive tokens – in cookies or localStorage? I think either of the two can be chosen as long as one understands the differences between them across certain aspects like storage, communication, cross-site and cross-origin access and security. Note: We will not consider using sessionStorage […]
If you’ve been struggling with sending or receiving cookies with your cross-origin fetch() requests (CORS), then make sure you’re adhering to each of the following points:
The SameSite attribute of cookies controls how they are sent in cross-site (slightly different from cross-origin) requests in web browsers through which we can reduce the risk of cross-site request forgery (CSRF) attacks and hence enhance user privacy and security. Before looking at the different values we can pass to this attribute, please read this […]
If you are running multiple apps on localhost across different subdomains (foo.localhost, bar.localhost, etc.) and want to set a cookie on one domain that is accessible from another subdomain, then you will have to watch out for a couple of things. Setting a Cookie with Domain=.localhost or Domain=localhost (since the dot notation is deprecated) will […]
I had to recently migrate the DNS configurations (A, AAAA CNAME, TXT, MX, etc. records) for a particular domain from DigitalOcean to Google Cloud Platform Cloud DNS. Doing it is really simple – you just need to export the zone file from DO and then import the same into GCP Cloud DNS (using the gcloud […]
Pydantic validators are great! The validation is performed as soon as you instantiate your model. But how do we perform validation on modification of a particular attribute or field of the (model) instance after its creation? When we instantiate our model, all the validators run. But when we change the value of a particular (model) […]
Everything in JavaScript is an object. When you try to access a property on the object, it is looked up on the object but if not found, then looked up on the object’s prototype. The prototype is another object accessible via ob.__proto__ or even better Object.getPrototypeOf(ob). This prototype is also an object which further has […]
Let’s say we have a simple Pydantic model that looks like this: When you instantiate a Pydantic model – post = Post(**data) – all the required attributes defined must be passed, i.e., id, title, body. What if you had one or more of the following requirements: This would mostly require us to have an attribute […]
The sort() array method sorts its elements in place (no copy is made) and returns a reference to the same array. Hence the array is mutated. The default sort order of this function is ascending but we can pass a compare function to define our own behaviour (like sorting in descending order). Here’s another example […]
The reverse() array method reverses its elements in place (no copy is made) and returns a reference to the same array. Hence, it mutates the array. The TC39 Change Array by copy proposal introduced a new method Array.prototype.toReversed() that does the same thing as reverse() but returns a new copy with the changes instead of […]