Dart vs Polymer: What are the differences?
What is Dart? A new web programming language with libraries, a virtual machine, and tools. Dart is a cohesive, scalable platform for building apps that run on the web (where you can use Polymer) or on servers (such as with Google Cloud Platform). Use the Dart language, libraries, and tools to write anything from simple scripts to full-featured apps.
What is Polymer? A new library built on top of Web Components, designed to leverage the evolving web platform on modern browsers. Polymer is a new type of library for the web, designed to leverage the existing browser infrastructure to provide the encapsulation and extendability currently only available in JS libraries. Polymer is based on a set of future technologies, including Shadow DOM, Custom Elements and Model Driven Views. Currently these technologies are implemented as polyfills or shims, but as browsers adopt these features natively, the platform code that drives Polymer evacipates, leaving only the value-adds.
Dart belongs to "Languages" category of the tech stack, while Polymer can be primarily classified under "Front-End Frameworks".
"Backed by Google" is the top reason why over 19 developers like Dart, while over 49 developers mention "Web components" as the leading cause for choosing Polymer.
Polymer is an open source tool with 21.1K GitHub stars and 2K GitHub forks. Here's a link to Polymer's open source repository on GitHub.
According to the StackShare community, Dart has a broader approval, being mentioned in 19 company stacks & 78 developers stacks; compared to Polymer, which is listed in 42 company stacks and 32 developer stacks.