Your question: What are the rules for naming a JavaScript?

What are the rules for naming variable?

Rules of naming variables

  • Name your variables based on the terms of the subject area, so that the variable name clearly describes its purpose.
  • Create variable names by deleting spaces that separate the words. …
  • Do not begin variable names with an underscore.
  • Do not use variable names that consist of a single character.

How should I name JavaScript files?

File names must be all lowercase and may include underscores ( _ ) or dashes ( – ), but no additional punctuation. Follow the convention that your project uses. Filenames’ extension must be . js .

What are the JavaScript guidelines?

JavaScript Coding Guidelines

  • JavaScript Files. JavaScript programs should be stored in and delivered as . …
  • Indentation. The unit of indentation is four spaces. …
  • Line Length. Avoid lines longer than 80 characters. …
  • Comments. Be generous with comments. …
  • Variable Declarations. …
  • Function Declarations. …
  • Names. …
  • Statements.

Which of these names are acceptable for JavaScript variables?

You can start a variable with any letter, $ , or _ character. As long as it doesn’t start with a number, you can include numbers as well.

  • Uppercase letter (Lu)
  • Lowercase letter (Ll)
  • Titlecase letter (Lt)
  • Modifier letter (Lm)
  • Other letter (Lo)
  • Letter number (Nl)
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What are the six rules of writing variables?

Rules for Naming Variables

The first character must be a letter or an underscore (_). You can’t use a number as the first character. The rest of the variable name can include any letter, any number, or the underscore. You can’t use any other characters, including spaces, symbols, and punctuation marks.

What are the rules for naming variable in Qbasic?

A variable name must be of the form $name or ${name}. The string name can consist of letters (a-z and A-Z), numbers (0-9), and underscore characters (_). The first character of name must be an alphabetic character (a-z or A-Z). If the ${name} form is used, spaces can also appear in name.

What is standard JavaScript?

JavaScript (JS) is a lightweight, interpreted, or just-in-time compiled programming language with first-class functions. The standards for JavaScript are the ECMAScript Language Specification (ECMA-262) and the ECMAScript Internationalization API specification (ECMA-402). …

How do I style JavaScript code?

General rules for object definitions:

  1. Place the opening bracket on the same line as the object name.
  2. Use colon plus one space between each property and its value.
  3. Use quotes around string values, not around numeric values.
  4. Do not add a comma after the last property-value pair.

How do I name a JavaScript CSS file?

Naming convention for assets (images, css, js)?

  1. CSS: style-{name}.css. examples: style-main. css , style-no_flash. css , style-print. css etc.
  2. JS: script-{name}.js. examples: script-main. js , script-nav. js etc.
  3. Images: {imageType}-{name}.{imageExtension} {imageType} is any of these.

What is current version of JavaScript?

ES2015 is the latest version of JavaScript programming language. It is the first major upgrade to JavaScript since 1997. It was approved in June 2015 by ECMA international, an association responsible for approving ECMA standards which programming languages like JavaScript, CoffeeScript and TypeScript follows.

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What are the features of JavaScript?

Javascript Features

  • Light Weight Scripting language.
  • Dynamic Typing.
  • Object-oriented programming support.
  • Functional Style.
  • Platform Independent.
  • Prototype-based.
  • Interpreted Language.
  • Async Processing.

Can JavaScript variables start with?

Naming variables

Start them with a letter, underscore _, or dollar sign $. After the first letter, you can use numbers, as well as letters, underscores, or dollar signs. Don’t use any of JavaScript’s reserved keywords.

What is the main purpose of JavaScript answer?

Explanation: JavaScript is a text-based programming language used both on the client-side and server-side that allows you to make web pages interactive. Where HTML and CSS are languages that give structure and style to web pages, JavaScript gives web pages interactive elements that engage a user.

Can you have numbers in your variable name?

After the first initial letter, variable names can also contain letters and numbers. No spaces or special characters, however, are allowed. Uppercase characters are distinct from lowercase characters. … You cannot use a C++ keyword (reserved word) as a variable name.