Does case matter in JavaScript?

Should JavaScript functions be capitalized?

3 Answers. According to the book “Javascript: the good parts”, you should only capitalise the first character of the name of a function when you need to construct the object by “new” keyword. This is called “the Constructor Invocation Pattern”, a way to inherits.

How do I make JavaScript case-sensitive?

The most basic way to do case insensitive string comparison in JavaScript is using either the toLowerCase() or toUpperCase() method to make sure both strings are either all lowercase or all uppercase.

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.

Is HTML case-sensitive?

Generally, HTML is case-insensitive, but there are a few exceptions. Entity names (the things that follow ampersands) are case-senstive, but many browsers will accept many of them entirely in uppercase or entirely in lowercase; a few must be cased in particular ways.

What is === in JavaScript?

=== (Triple equals) is a strict equality comparison operator in JavaScript, which returns false for the values which are not of a similar type. This operator performs type casting for equality. If we compare 2 with “2” using ===, then it will return a false value.

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Is == case-sensitive in JS?

JavaScript is a case-sensitive language. This means that the language keywords, variables, function names, and any other identifiers must always be typed with a consistent capitalization of letters.

What is JavaScript and why is it important?

JavaScript is a programming language used primarily by Web browsers to create a dynamic and interactive experience for the user. Most of the functions and applications that make the Internet indispensable to modern life are coded in some form of JavaScript.

Why is let better than VAR?

let allows you to declare variables that are limited in scope to the block, statement, or expression on which it is used. This is unlike the var keyword, which defines a variable globally, or locally to an entire function regardless of block scope.

Should I use VAR or let?

The main difference between the two though is that let deals with block scope whereas var deals with global scope or function scope depending on where it’s declared. As long as your variable isn’t declared within any function, var can be used again anywhere else in your code.

Should you ever use VAR in JavaScript?

Most Javascript experts agree var shouldn’t be used. Douglas Crockford, the man who popularized JSON, is against the use of var. He indicates that, “var might possibly still be useful in an extreme case like machine-generated code, but I’m stretching hard there.

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