JavaScript
JavaScript is a programming language for application logic, in browsers and elsewhere. Its role differs from HTML and CSS.
Program an application's behaviour
JavaScript is a programming language used, among other things, for interactive web interface logic. It can also run outside the browser, such as on a server with a suitable runtime. Its execution environment helps determine available functions and access.
In a fictional transport overview, JavaScript requests new shipment information after a click and updates the display. If no response arrives, the application must handle that state. The language does not define error handling automatically.
HTML describes content structure and meaning; CSS controls presentation. JavaScript can implement behaviour on top. Choosing the language alone says nothing about usability quality, data connections or the business correctness of a function.
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Related terms
- HTMLHTML describes the structure and meaning of web content. It identifies elements such as headings, tables and input fields.
- CSSCSS describes the presentation of structured content, including layout, colours and typography. It must fit interaction and actual content.
- TypeScriptTypeScript adds a static type system to JavaScript. It assists development but does not replace checks on actual incoming data.
- Legacy systemAn existing system still in use, with technical and business dependencies accumulated over time.
- Multi-tenancyMulti-tenancy supports separate customer or group scopes in one solution. A tenant is not automatically one person or one database.
- Browser cacheThe browser cache stores suitable HTTP responses for later use. Reuse and revalidation follow the applicable rules.
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