For example, React still includes semicolons in its docs, but Vue does not. Vue was my next stop in JavaScript frameworks after jQuery and React, and I decided to adopt the no-semicolon coding style featured in the docs.

Are semicolons required in JSX?

1 Answer. It's because JSX {} expressions are limited to a single expression. ..will throw an error. There's no need for semi-colons if there will only be a single expression.

Is semicolon mandatory 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 you shouldn't use semicolons?

The problem is, because semicolons allow you to join unwieldy items, they allow writers to create unwieldy sentences that would be better broken up into shorter ones. ... In any paragraph of just two sentences, you could argue that they're closely related because, obviously, they're the only two in the paragraph.

Are semi colons overused?

A Word, Please: Semicolons have two specific purposes, so don't overuse.

Why I Don't Use Semicolons In JavaScript

38 related questions found

Are semicolons dead?

The Semicolon died this week at the age of 417 from complications of irrelevancy and misuse.

Can JavaScript run without semicolon?

Semicolons in JavaScript divide the community. ... This is all possible because JavaScript does not strictly require semicolons. When there is a place where a semicolon was needed, it adds it behind the scenes. The process that does this is called Automatic Semicolon Insertion.

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.

Does TypeScript need semicolons?

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

Is semicolon required in Python?

Python semicolon

Python does not mandate the use of semicolons for delimiting statements. Semi-colons can be used to delimit statements if you wish to put multiple statements on the same line. Semi-colons are used only in atypical situations in Python.

Can I use JSX without React?

JSX is not a requirement for using React. Using React without JSX is especially convenient when you don't want to set up compilation in your build environment. Each JSX element is just syntactic sugar for calling React. ... So, anything you can do with JSX can also be done with just plain JavaScript.

Do arrow functions end with semicolon?

Arrow functions are created by assigning a variable with a function expression. The entire statement is like any other JavaScript statement in that the semicolon at the end is optional. It is, however, considered "best practice" to always use it.

Are semicolons optional in C#?

Semi-colons will always be required, it will not change. So the answers that talk about how C# would work without them are moot.

Is semicolon mandatory in angular?

Where are semicolons optional and where are they required? Firstly, a semicolon is optional only where there is a line break, a closing brace, or the end of the program. Semicolons are not optional between statements appearing on the same line.

Should I use semicolons in Swift?

Semicolons. Unlike many other languages, Swift doesn't require you to write a semicolon ( ; ) after each statement in your code, although you can do so if you wish. However, semicolons are required if you want to write multiple separate statements on a single line: let cat = "?"; print(cat)

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.

When should I use semicolons in JavaScript?

The JavaScript parser will automatically add a semicolon when, during the parsing of the source code, it finds these particular situations:

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.

What is strict mode in JavaScript?

JavaScript's strict mode, introduced in ECMAScript 5, is a way to opt in to a restricted variant of JavaScript, thereby implicitly opting-out of "sloppy mode". ... Strict mode makes several changes to normal JavaScript semantics: Eliminates some JavaScript silent errors by changing them to throw errors.

Do you need a semicolon after console log?

JavaScript Basics — Part 1

The console. ... As with all JavaScript statements, make sure you end the console. log statement with a semicolon: Even though you can kind of get away with writing a JavaScript statement without a semicolon, semicolons help with readability in code.

Is JavaScript case sensitive?

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

When can you omit the semicolon at the end of a statement Command PHP?

You may only drop the semi-colon after a statement when the statement is followed immediately by a closing PHP tag -- ie ?> . This is a feature from the earliest days of the language, aimed at making templated code slightly easier to read.

Who invented semicolon?

The modern semicolon was invented in Venice, in 1494, by the printer and publisher Aldus Manutius, and, for much of history, it had no strictly defined function. It acted like a musical notation, allowing for a pause somewhere between the beat of a comma and a colon (hence its mongrel design).

What is the semicolon tattoo?

A semicolon tattoo is a tattoo of the semicolon punctuation mark (;) used as a message of affirmation and solidarity against suicide, depression, addiction, and other mental health issues.

Is project semicolon still active?

Though Bleuel committed suicide in March 2017, Project Semicolon remains an active nonprofit support network, and this book...

Does jQuery need semicolons?

Go with the flow, so to speak. For example, you might include semicolons when you are writing vanilla JavaScript, jQuery, and Node. js and leave the semicolons off when you write React and Vue.