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Matthew Butterick 3f36e2ce2c porting		7 years ago
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README.md

constantinople

Determine whether a JavaScript expression evaluates to a constant (using UglifyJS). Here it is assumed to be safe to underestimate how constant something is.

Installation

npm install constantinople

Usage

var isConstant = require('constantinople')

if (isConstant('"foo" + 5')) {
  console.dir(isConstant.toConstant('"foo" + 5'))
}

API

isConstant(src)

Returns true if src evaluates to a constant, false otherwise. It will also return false if there is a syntax error, which makes it safe to use on potentially ES6 code.

toConstant(src)

Returns the value resulting from evaluating src. This method throws an error if the expression is not constant. e.g. toConstant("Math.random()") would throw an error.

License

MIT