pugjsis-expression
Validates a string as a JavaScript expression
Installation
npm install is-expressionUsage
isExpression(src[, options])
Validates a string as a JavaScript expression.
src contains the source.
options can contain any Acorn options (since we use Acorn under-the-hood),
or any of the following:
throw: Throw an error if the string is not an expression. The error can be an Acorn error, with location information inerr.locanderr.pos. Defaults tofalse.strict: Use strict mode when trying to parse the string. Defaults tofalse. Even if this option isfalse, if you have providedoptions.sourceType === 'module'which imples strict mode under ES2015, strict mode will be used.lineComment: Whentrue, allows line comments in the expression. Defaults tofalsefor safety.
See the examples below for usage.
Examples
var isExpression = require('is-expression')
isExpression('myVar')
//=> true
isExpression('var')
//=> false
isExpression('["an", "array", "\'s"].indexOf("index")')
//=> true
isExpression('var', {throw: true})
// SyntaxError: Unexpected token (1:0)
// at Parser.pp.raise (acorn/dist/acorn.js:940:13)
// at ...
isExpression('public')
//=> true
isExpression('public', {strict: true})
//=> false
isExpression('abc // my comment')
//=> false
isExpression('abc // my comment', {lineComment: true})
//=> trueLicense
MIT