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A "Hello, World!" program is generally a simple computer program which emits (or displays) to the screen (often the console) a message similar to "Hello, World!" while ignoring any user input. A small piece of code in most general-purpose programming languages, this program is used to illustrate a language's basic syntax.
JavaScript. JavaScript ( / ˈdʒɑːvəskrɪpt / ), often abbreviated as JS, is a programming language and core technology of the Web, alongside HTML and CSS. 99% of websites use JavaScript on the client side for webpage behavior. [ 10] Web browsers have a dedicated JavaScript engine that executes the client code.
In all modern character sets, the null character has a code point value of zero. In most encodings, this is translated to a single code unit with a zero value. For instance, in UTF-8 it is a single zero byte. However, in Modified UTF-8 the null character is encoded as two bytes: 0xC0,0x80. This allows the byte with the value of zero, which is ...
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A web page is a structured document. The core element is a text file written in the HyperText Markup Language (HTML). This specifies the content of the page, [ 3] including images and video . Cascading Style Sheets (CSS) specify the presentation of the page. [ 3] CSS rules can be in separate text files or embedded within the HTML file.
He thought of the idea of being able to write and share code all in a web browser. He spent two years creating an open-source product with Haya Odeh called "JSRepl". [10] This product allowed him to compile languages into JavaScript. It powered Udacity and Codecademy's tutorials. After becoming an early employee of Codecademy, this project was ...
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JavaScript code can use the Document Object Model (DOM), provided by the HTML standard, to manipulate a web page in response to events, like user input. Using a technique called AJAX , JavaScript code can also actively retrieve content from the web (independent of the original HTML page retrieval), and also react to server-side events as well ...