Let’s introduce ourselves to JavaScript computer programming language

The three core LANGUAGES of a web page.

  • <HTML> for content and structure. Eg What is the headline, how paragraphs and what is the content in the paragraphs?
  • CSS (Cascade Style Sheet) language. Eg what font, what background color?
  • JavaScript: Programming language for behavior and interactivity. What happens when a mousse hovers over a menu? What happens when you type a wrong value in a form fill? Note that JavaScript works inside another application especially web browser. All browsers have JavaScript engine inside them. OS runs the Browser, the Browser runs the Page and the Page contains js.

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