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@babel/helper-validator-identifier

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@babel/helper-validator-identifier

Validate identifier/keywords name


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Maintainers
6
Weekly downloads
47,659,725
decreased by-7.66%

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Package description

What is @babel/helper-validator-identifier?

The @babel/helper-validator-identifier npm package is a utility library used by Babel to validate string identifiers according to the ECMAScript specification. It provides functions to determine if a string is a valid identifier name, which is useful when manipulating code in a way that needs to adhere to JavaScript naming conventions.

What are @babel/helper-validator-identifier's main functionalities?

isValidIdentifier

Checks if a string is a valid ECMAScript identifier name.

const isValid = require('@babel/helper-validator-identifier').isValidIdentifier;
console.log(isValid('validName')); // true
console.log(isValid('123invalid')); // false

isIdentifierStart

Checks if a character code can start an ECMAScript identifier.

const isIdentifierStart = require('@babel/helper-validator-identifier').isIdentifierStart;
console.log(isIdentifierStart('v'.charCodeAt(0))); // true
console.log(isIdentifierStart('1'.charCodeAt(0))); // false

isIdentifierChar

Checks if a character code can be part of an ECMAScript identifier.

const isIdentifierChar = require('@babel/helper-validator-identifier').isIdentifierChar;
console.log(isIdentifierChar('n'.charCodeAt(0))); // true
console.log(isIdentifierChar('!'.charCodeAt(0))); // false

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@babel/helper-validator-identifier

Validate identifier/keywords name

See our website @babel/helper-validator-identifier for more information.

Install

Using npm:

npm install --save-dev @babel/helper-validator-identifier

or using yarn:

yarn add @babel/helper-validator-identifier --dev

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Last updated on 30 Jun 2020

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