You asked: What does a semicolon mean in JavaScript?

What does the semicolon do in JavaScript?

Semicolons are an essential part of JavaScript code. They are read and used by the compiler to distinguish between separate statements so that statements do not leak into other parts of the code.

Is semicolon compulsory in JS?

No, semicolons are usually optional in JavaScript (Google for ASI / automatic semicolon insertion). Using them makes the code look much cleaner though and ASI is a horrible mis-feature (at least in my opinion).

Why are semicolons optional in JavaScript?

The reason semicolons are sometimes optional in JavaScript is because of automatic semicolon insertion, or ASI. ASI doesn’t mean that actual semicolons are inserted into your code, it’s more of a set of rules used by JavaScript that will determine whether or not a semicolon will be interpreted in certain spots.

What does semicolon mean in?

: a punctuation mark; that can be used to separate parts of a sentence which need clearer separation than would be shown by a comma, to separate main clauses which have no conjunction between, and to separate phrases and clauses containing commas.

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When should I use semicolons in JavaScript?

The rules of JavaScript Automatic Semicolon Insertion

  1. when the next line starts with code that breaks the current one (code can spawn on multiple lines)
  2. when the next line starts with a } , closing the current block.
  3. when the end of the source code file is reached.
  4. when there is a return statement on its own line.

Do I need semicolons in react?

One camp writes code that includes semicolons. Their code looks a bit more like a language that actually requires semicolons, like C or PHP. The other camp leaves the semicolons off, relying on ASI to put them in automatically. … For example, React still includes semicolons in its docs, but Vue does not.

Should I use semicolons in TypeScript?

Conclusion. Use TypeScript (with no-unexpected-multiline) and safely omit semicolons.

Are semicolons necessary?

Semicolons help you connect closely related ideas when a style mark stronger than a comma is needed. By using semicolons effectively, you can make your writing sound more sophisticated.

Why is it bad to use an automatic semicolon?

Douglas Crockford’s JavaScript: The Good Parts says on two separate occasions that it is a bad idea. The automatic semicolon insertion can hide bugs in your program and creates ambiguity.

Why is it appropriate to terminate every statement with a semicolon even the last one in a function?

Please do use the semicolon to end a statement even though it’s not mandatory. It will give you plenty of benefits. They all have to do with code readability. They contribute to code maintainability, code quality, and the number of bugs lurking in your code.

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Is JavaScript a programming?

JavaScript is a text-based programming language used both on the client-side and server-side that allows you to make web pages interactive. … Incorporating JavaScript improves the user experience of the web page by converting it from a static page into an interactive one. To recap, JavaScript adds behavior to web pages.

Are semicolon tattoos cliche?

It has become a cliche, a bore, a drill for us. We joke about the predictability and lament the fact that people can’t seem to come up with a more original symbol for suicide awareness — maybe, we hope, one that would be more interesting to tattoo.

What are some examples of semicolons?

Examples of Semicolons: Joan likes eggs; Jennifer does not. The cat slept through the storm; the dog cowered under the bed. Semicolons are also used in a sentence when something stronger than a comma is needed.

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