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1.1 KiB
1.1 KiB
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