Lightning web Components.
Lightning Web Components:- Lightning web components are leverages new web standards and allows developers to create web components which can work in Salesforce Lightning platform. It is new programing model to create lightning components. Lightning Web components are custom HTML elements built using HTML and modern java script ES6+. Lightning Web Components uses core Web Components standards and provides only what's necessary to perform well in browsers supported by Salesforce. Lightning Web Components are lightweight and delivers exceptional performance. Because its built on code that runs natively in browsers. All the key elements to create component are part of native web browser engine and you don't need any framework to create these components. These are based on modern web standards and It enhance and make use of custom elements, templates ,decorators, Shadow DOM, various modules in ECMAScript7.