146 lines
3.9 KiB
Markdown
146 lines
3.9 KiB
Markdown
<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"/> pathval
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</a>
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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>
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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>
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<a href="https://github.com/chaijs/pathval/releases">
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<img
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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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/>
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</a>
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<a href="https://travis-ci.org/chaijs/pathval">
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<img
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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>
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<a href="https://coveralls.io/r/chaijs/pathval">
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<img
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alt="coverage:?"
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src="https://img.shields.io/coveralls/chaijs/pathval/master.svg?style=flat-square"
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/>
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</a>
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<a href="https://www.npmjs.com/packages/pathval">
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<img
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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>
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<a href="https://www.npmjs.com/packages/pathval">
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<img
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alt="dependencies:?"
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src="https://img.shields.io/npm/dm/pathval.svg?style=flat-square"
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/>
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</a>
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<a href="">
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<img
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alt="devDependencies:?"
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src="https://img.shields.io/david/chaijs/pathval.svg?style=flat-square"
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/>
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</a>
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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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</a>
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<br>
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<a href="https://chai-slack.herokuapp.com/">
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<img
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alt="Join the Slack chat"
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src="https://img.shields.io/badge/slack-join%20chat-E2206F.svg?style=flat-square"
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/>
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</a>
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<a href="https://gitter.im/chaijs/chai">
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<img
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alt="Join the Gitter chat"
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src="https://img.shields.io/badge/gitter-join%20chat-D0104D.svg?style=flat-square"
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/>
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</a>
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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`'.
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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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