@react-pug/is-expression

Validates a string as a JavaScript, TypeScript, or JSX expression.

Installation

npm install @react-pug/is-expression

Usage

isExpression(src[, options])

Validates a string as a JavaScript, TypeScript, or JSX expression.

src contains the source.

options currently supports:

• throw: Throw the parser error if the string is not a valid expression. Defaults to false.

Examples

var isExpression = require('@react-pug/is-expression')

isExpression('myVar')
//=> true
isExpression('var')
//=> false
isExpression('["an", "array", "\'s"].indexOf("index")')
//=> true

isExpression('value as string')
//=> true

isExpression('<Button label="ok" />')
//=> true

isExpression('abc // my comment')
//=> true

isExpression('var', {throw: true})
// SyntaxError: Unexpected token (1:0)

Notes

• This package is maintained in the react-pug monorepo.
• It intentionally validates modern JavaScript, TypeScript, and JSX expression syntax.
• This fork reset version numbering under the @react-pug/* namespace, so 0.1.6 is newer than the old upstream-style 4.x line used before vendoring.

Attribution

This package is derived from the original pugjs/is-expression project:

https://github.com/pugjs/is-expression

License

MIT