inspect-parameters-declaration

Inspects function's parameters declaration and returns information about it (e.g. names, default values, if needs destructuring, destructured parameters names and default values).

Installation

npm install inspect-parameters-declaration

CLI

npm install inspect-parameters-declaration -g

npx inspect-parameters-declaration --help

Usage

inspectParameters(source);

getParametersNames(source);

• source is a function reference or a string containing the parameters declaration (e.g. 'a = "z, b = [1,2,3], c, {d,e: {f}, g} = {}')

getParametersNamesFromInspection(inspectedParameters);

• inspectedParameters expects the result from inspectParameters(source);

const { getParametersNames, inspectParameters } = require('inspect-parameters-declaration');
 
const testFunction = (a = "z", b = [1,2,3], c, {d,e: {f}, g} = {}, ...theArgs) => console.log("noop");
 
const parametersNames = getParametersNames(testFunction);
const inspectedParameters = inspectParameters(testFunction);
 
///////////////////////////////
// parametersNames :: RESULT //
///////////////////////////////
// [ "a", "b", "c", "d", "f", "g", "theArgs" ]
 
 
///////////////////////////////////
// inspectedParameters :: RESULT //
///////////////////////////////////
// [
//     {
//         "parameter": "a",
//         "defaultValue": "z",
//         "declaration": "a = \"z\""
//     },
//     {
//         "parameter": "b",
//         "defaultValue": "[1,2,3]",
//         "declaration": "b = [1,2,3]"
//     },
//     {
//         "parameter": "c",
//         "declaration": "c"
//     },
//     {
//         "parameter": "{d,e: {f}, g}",
//         "defaultValue": "{}",
//         "expectsDestructuring": true,
//         "declaration": "{d,e: {f}, g} = {}",
//         "destructuredParameters": [
//             {
//                 "parameter": "d",
//                 "declaration": "d"
//             },
//             {
//                 "parameter": "f",
//                 "declaration": "f"
//             },
//             {
//                 "parameter": "g",
//                 "declaration": "g"
//             }
//         ]
//     },
//     {
//         "parameter": "theArgs",
//         "isRestParameter": true,
//         "declaration": "...theArgs"
//     }
// ]