What is polymer in HTML?

What is polymer in HTML?

Polymer. js is a JavaScript library created by Google that allows reusing the HTML elements for building applications with components. Polymer is an open-source JavaScript library developed by Google developers and was initially released on May 27, 2015. The stable release is 1.7.

What is polymer Code?

A designated polymer identification code is established by the Society of the Plastic Industry (SPI) to identify the polymer product containing a set of specific properties. The number not used indicates how difficult the item is to recycle or how often the plastic has been recycled.

How do you start a polymer project?

Set up basic app project

  1. Create a directory for your app project. mkdir app cd app.
  2. Initialize your app. Polymer CLI asks you a few questions as it sets up your app.
  3. Select polymer-2-application .
  4. Enter a name for your app.
  5. Enter a name for the main element in your project.
  6. Enter a description for your app.

What is a polymer template?

DOM templating provides an easy way to create a DOM subtree for your element. By default, adding a DOM template to an element causes Polymer to create a shadow root for the element and clone the template into the shadow tree. The DOM template is also processed to enable data binding and declarative event handlers.

Is YouTube made with polymer?

Recently at the Polymer Summit 2016 event it was announced that YouTube already uses Web Components and Polymer in some of it’s properties like YouTube Gaming. YouTube is one of Google’s biggest products with over a billion users is now building their next generation of Mobile and Desktop sites all on Polymer.

How do you install polymer 3?

Install Polymer 3.0

  1. Install the Polymer 3.0 prerequisites. Install Git. Install npm and Node.js. Install Polymer CLI.
  2. Optional: Download and serve a sample Polymer 3.0 app.
  3. Next steps.

How do you create a polymer?

Assorted combinations of heat, pressure and catalysis alter the chemical bonds that hold monomers together, causing them to bond with one another. Most often, they do so in a linear fashion, creating chains of monomers called polymers.

What is Shadow DOM in HTML?

Shadow DOM allows hidden DOM trees to be attached to elements in the regular DOM tree — this shadow DOM tree starts with a shadow root, underneath which can be attached to any elements you want, in the same way as the normal DOM.

What is Dom if?

Element (DomIf) Custom element that conditionally stamps and hides or removes template content based on a boolean flag.

What are examples of polymers?

Examples of synthetic polymers include nylon, polyethylene, polyester, Teflon, and epoxy. Natural polymers occur in nature and can be extracted. They are often water-based. Examples of naturally occurring polymers are silk, wool, DNA, cellulose and proteins.

How to define polymer elements in HTML?

The Polymer elements can be defined by specifying the following three HTML imports − polymer-element.html − It specifies the Polymer.Element base class. legacy-element.html − It extends Polymer.Element using Polymer.LegacyElement base class and adds 1.x compatible legacy API.

What are custom elements in polymer?

The Polymer site pretty much nails the description of custom elements: “Custom Elements are the core building blocks of Polymer-based applications. Polymer gives us the ability to create our own custom elements from scratch and even reuse other elements to extend our custom ones.

How do I create a template in polypolymer?

Polymer provides three basic ways to specify a DOM template: Use the element. This allows you to specify the template entirely in markup, which is most efficient for an element defined in an HTML import. Define a template property on the constructor.

Why should I use polymer instead of JavaScript?

That would typically entail some heavy duty JavaScript code to do but by using Polymer, I can simply use the following syntax: This looks like the HTML tag syntax we’ve all grown up with and is far easier to implement, read and maintain than some complex JavaScript code.