angular 2

ZoneTracker: Tracking JavaScript Performance with Zone.js thumbnail

Lucidchart is a highly performant web application. When editing a Lucidchart document, users expect a high frame rate and a responsive UI. To ensure a great experience, we track frame rate and UI stalls. This article describes how we leverage an existing library, Zone.js, to accomplish this. Prereq: The JavaScript…

How to handle folder uploads in Angular 2+ thumbnail

At Lucidpress, we recently decided to revamp our image manager experience by creating a completely new image manager written in Angular 2 and Typescript. One of the key new features we wanted to add was bulk image upload, which is the ability to upload a folder with all of its…

5 Angular directives you can use in your project thumbnail

In a recent blog, we showed off some examples of Angular pipes we use in our code base. Now, we’d like to talk about directives. Angular directives allow you to attach behavior to elements in the DOM and reuse it across your project. The framework already comes with a number…

5 usage ideas for Angular pipes thumbnail

Pipes are a useful feature in Angular. They are a simple way to transform values in an Angular template. There are some built in pipes, but you can also build your own pipes. A pipe takes in a value or values and then returns a value. This is great for…

Removing Roadblocks in the Move to Angular 4 thumbnail

Angular has become the de facto front-end MVC framework of the Web. We had been slowly adopting Angular 1 here at Lucidchart, but the vast majority of our crucial components were built in jQuery and vanilla JavaScript. We were one of the early pioneers of Angular 2. We found Angular…

Using Angular 2 Components In a Non-Angular App thumbnail

Lucidpress is a large application—hundreds of thousands of lines of handwritten JavaScript. After seeing the success Lucidchart had in modernizing its UI with Angular, we wanted to follow suit, but we didn’t have the resources to do a wholesale rewrite all at once. We wanted to write some new Angular…

Angular 2 Change Detection: “Seeing” It in Action thumbnail

The Angular 2 change detection system is somewhat of a black box: you update some variables in the model, and the components update automatically. Thoughtram, Victor Savkin, and other websites have written some excellent posts explaining change detection (which we reference in this post). Often, these posts present a series…

Angular 2 has several different paradigms for bootstrapping an application. The default platform that is used in Angular’s examples is the dynamic browser platform. Platform browser means that this application is going to be bootstrapped in a browser and will therefore have direct access to the DOM and other browser…

Let’s be honest. Setting up a “modern” front end application in 2016 can be painful. Luckily the Angular 2 team has provided a command line tool, angular-cli, to help ease the pain. Although it is still in beta, angular-cli is a great way to set up an Angular 2 project…

Angular 2 and Observables: Data Sharing in a Multi-View Application thumbnail

Recently, I started on a project to migrate JavaScript to TypeScript in one of Lucidchart’s Angular 2 applications. This application has several components, each with its unique view. For those not familiar with Angular 2, a component is merely an encapsulation of a view on a webpage with its associated…