126 lines
4.2 KiB
Markdown
126 lines
4.2 KiB
Markdown
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# [each-props][repo-url] [![NPM][npm-img]][npm-url] [![MIT License][mit-img]][mit-url] [![Build Status][travis-img]][travis-url] [![Build Status][appveyor-img]][appveyor-url] [![Coverage Status][coverage-img]][coverage-url]
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Processes each properties of an object deeply.
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## Install
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To install from npm:
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```sh
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$ npm i each-props --save
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```
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## Load this module
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For Node.js:
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```js
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const eachProps = require('each-props');
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```
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For Web browser:
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```html
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<script src="each-props.min.js"></script>
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```
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## Usage
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Apply a function to all (non plain object) properties.
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```js
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var obj = { a: 1, b: { c: 'CCC', d: { e: 'EEE' } } };
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eachProps(obj, function(value, keyChain, nodeInfo) {
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if (keyChain === 'a') {
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nodeInfo.parent['a'] = value * 2;
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} else if (keyChain === 'b.c') {
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nodeInfo.parent['c'] = value.toLowerCase();
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} else if (keyChain === 'b.d') {
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return true; // stop to dig
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} else if (keyChain === 'b.d.e') {
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nodeInfo.parent['e'] = value.toLowerCase();
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}
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});
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console.log(obj);
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// => { a: 2, b: { c: 'ccc', d: { e: 'EEE' } } };
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```
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## API
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### <u>eachProps(obj, fn [, opts]) : void</u>
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Executes the *fn* function for all properties.
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#### Parameters:
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| Parameter | Type | Description |
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|:------------|:------:|:-----------------------------------------------|
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| *obj* | object | A plain object to be treated. |
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| *fn* |function| A function to operate each properties. |
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| *opts* | object | An object to pass any data to each properties. |
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* **API of *fn* function**
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#### <u>fn(value, keyChain, nodeInfo) : boolean</u>
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This function is applied to all properties in an object.
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##### Parameters:
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| Parameter | Type | Description |
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|:------------|:------:|:-----------------------------------------------|
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| *value* | any | A property value. |
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| *keyChain* | string | A string concatenating the hierarchical keys with dots. |
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| *nodeInfo* | object | An object which contains node informations (See [below](#nodeinfo)). |
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##### Returns:
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True, if stops digging child properties.
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**Type:** boolean
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<a name="nodeinfo"></a>
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* **Properties of <i>nodeInfo</i>**
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| Properties | Type | Description |
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|:-------------|:------:|:-----------------------------------------|
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| *name* | string | The property name of this node. |
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| *index* | number | The index of the property among the sibling properties. |
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| *count* | number | The count of the sibling properties. |
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| *depth* | number | The depth of the property. |
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| *parent* | object | The parent node of the property. |
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| *sort* |function| A sort function which orders the child properties. This function is inherited from *opts*, if be specified. |
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... and any properties inherited from *opts*.
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* **Properties of <i>opts</i>**
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| Properties | Type | Description |
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|:-------------|:------:|:-----------------------------------------|
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| *sort* |function| A sort function which orders the same level properties. (Optional) |
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... and any properties you want to pass to each node.
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## License
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Copyright (C) 2016-2018 Takayuki Sato
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This program is free software under [MIT][mit-url] License.
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See the file LICENSE in this distribution for more details.
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[repo-url]: https://github.com/sttk/each-props/
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[npm-img]: https://img.shields.io/badge/npm-v1.3.2-blue.svg
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[npm-url]: https://www.npmjs.org/package/each-props/
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[mit-img]: https://img.shields.io/badge/license-MIT-green.svg
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[mit-url]: https://opensource.org/licenses.MIT
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[travis-img]: https://travis-ci.org/sttk/each-props.svg?branch=master
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[travis-url]: https://travis-ci.org/sttk/each-props
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[appveyor-img]: https://ci.appveyor.com/api/projects/status/github/sttk/each-props?branch=master&svg=true
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[appveyor-url]: https://ci.appveyor.com/project/sttk/each-props
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[coverage-img]: https://coveralls.io/repos/github/sttk/each-props/badge.svg?branch=master
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[coverage-url]: https://coveralls.io/github/sttk/each-props?branch=master
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