: URLs, HTTP, HTML, CSS, JavaScript (ECMAScript 2015+), JSON, and the DOM.
According to the Frontend Masters Handbook 2017 guide , developers in 2017 were expected to be proficient in: Front-end Developer Handbook 2017
: Identifies self-directed and directed resources, including books, screencasts, and bootcamps for mastering the trade . : URLs, HTTP, HTML, CSS, JavaScript (ECMAScript 2015+),
The guide is organized into three primary sections to cover the breadth of the field: JavaScript (ECMAScript 2015+)