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<h1 align=center> |
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<a href="http://chaijs.com" title="Chai Documentation"> |
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<img alt="ChaiJS" src="http://chaijs.com/img/chai-logo.png"> |
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</a> |
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pathval |
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</h1> |
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<p align=center> |
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Tool for Object value retrieval given a string path for <a href="http://nodejs.org">node</a> and the browser. |
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<p align=center> |
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<a href="./LICENSE"> |
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<img |
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alt="license:mit" |
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src="https://img.shields.io/badge/license-mit-green.svg?style=flat-square" |
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/> |
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<a href="https://github.com/chaijs/pathval/releases"> |
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alt="tag:?" |
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src="https://img.shields.io/github/tag/chaijs/pathval.svg?style=flat-square" |
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alt="build:?" |
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src="https://img.shields.io/travis/chaijs/pathval/master.svg?style=flat-square" |
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/> |
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<a href="https://www.npmjs.com/packages/pathval"> |
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alt="npm:?" |
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src="https://img.shields.io/npm/v/pathval.svg?style=flat-square" |
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/> |
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<a href="https://www.npmjs.com/packages/pathval"> |
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src="https://img.shields.io/npm/dm/pathval.svg?style=flat-square" |
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/> |
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src="https://img.shields.io/david/chaijs/pathval.svg?style=flat-square" |
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/> |
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<br/> |
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<a href="https://saucelabs.com/u/chaijs-pathval"> |
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<img |
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alt="Selenium Test Status" |
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src="https://saucelabs.com/browser-matrix/chaijs-pathval.svg" |
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/> |
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alt="Join the Slack chat" |
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</p> |
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## What is pathval? |
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Pathval is a module which you can use to retrieve or set an Object's property for a given `String` path. |
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## Installation |
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### Node.js |
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`pathval` is available on [npm](http://npmjs.org). To install it, type: |
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$ npm install pathval |
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### Browsers |
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You can also use it within the browser; install via npm and use the `pathval.js` file found within the download. For example: |
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```html |
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<script src="./node_modules/pathval/pathval.js"></script> |
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``` |
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## Usage |
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The primary export of `pathval` is an object which has the following methods: |
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* `hasProperty(object, name)` - Checks whether an `object` has `name`d property or numeric array index. |
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* `getPathInfo(object, path)` - Returns an object with info indicating the value of the `parent` of that path, the `name ` of the property we're retrieving and its `value`. |
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* `getPathValue(object, path)` - Retrieves the value of a property at a given `path` inside an `object`'. |
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* `setPathValue(object, path, value)` - Sets the `value` of a property at a given `path` inside an `object` and returns the object in which the property has been set. |
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```js |
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var pathval = require('pathval'); |
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``` |
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#### .hasProperty(object, name) |
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```js |
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var pathval = require('pathval'); |
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var obj = { prop: 'a value' }; |
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pathval.hasProperty(obj, 'prop'); // true |
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``` |
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#### .getPathInfo(object, path) |
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```js |
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var pathval = require('pathval'); |
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var obj = { earth: { country: 'Brazil' } }; |
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pathval.getPathInfo(obj, 'earth.country'); // { parent: { country: 'Brazil' }, name: 'country', value: 'Brazil', exists: true } |
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``` |
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#### .getPathValue(object, path) |
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```js |
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var pathval = require('pathval'); |
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var obj = { earth: { country: 'Brazil' } }; |
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pathval.getPathValue(obj, 'earth.country'); // 'Brazil' |
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``` |
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#### .setPathValue(object, path, value) |
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```js |
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var pathval = require('pathval'); |
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var obj = { earth: { country: 'Brazil' } }; |
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pathval.setPathValue(obj, 'earth.country', 'USA'); |
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obj.earth.country; // 'USA' |
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``` |
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