156 lines
2.7 KiB
Markdown
156 lines
2.7 KiB
Markdown
# stringify-object [](http://travis-ci.org/yeoman/stringify-object)
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> Stringify an object/array like JSON.stringify just without all the double-quotes
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Useful for when you want to get the string representation of an object in a formatted way.
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It also handles circular references and lets you specify quote type.
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## Install
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```
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$ npm install stringify-object
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```
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## Usage
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```js
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const stringifyObject = require('stringify-object');
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const obj = {
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foo: 'bar',
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'arr': [1, 2, 3],
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nested: { hello: "world" }
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};
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const pretty = stringifyObject(obj, {
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indent: ' ',
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singleQuotes: false
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});
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console.log(pretty);
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/*
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{
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foo: "bar",
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arr: [
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1,
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2,
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3
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],
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nested: {
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hello: "world"
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}
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}
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*/
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```
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## API
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### stringifyObject(input, [options])
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Circular references will be replaced with `"[Circular]"`.
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#### input
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Type: `Object` `Array`
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#### options
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##### indent
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Type: `string`<br>
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Default: `\t`
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Preferred indentation.
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##### singleQuotes
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Type: `boolean`<br>
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Default: `true`
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Set to false to get double-quoted strings.
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##### filter(obj, prop)
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Type: `Function`
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Expected to return a `boolean` of whether to include the property `prop` of the object `obj` in the output.
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##### transform(obj, prop, originalResult)
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Type: `Function`<br>
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Default: `undefined`
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Expected to return a `string` that transforms the string that resulted from stringifying `obj[prop]`. This can be used to detect special types of objects that need to be stringified in a particular way. The `transform` function might return an alternate string in this case, otherwise returning the `originalResult`.
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Here's an example that uses the `transform` option to mask fields named "password":
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```js
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const obj = {
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user: 'becky',
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password: 'secret'
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}
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const pretty = stringifyObject(obj, {
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transform: (obj, prop, originalResult) => {
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if (prop === 'password') {
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return originalResult.replace(/\w/g, '*');
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} else {
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return originalResult;
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}
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}
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});
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console.log(pretty);
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/*
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{
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user: 'becky',
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password: '******'
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}
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*/
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```
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##### inlineCharacterLimit
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Type: `number`
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When set, will inline values up to `inlineCharacterLimit` length for the sake of more terse output.
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For example, given the example at the top of the README:
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```js
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const obj = {
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foo: 'bar',
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'arr': [1, 2, 3],
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nested: { hello: "world" }
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};
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const pretty = stringifyObject(obj, {
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indent: ' ',
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singleQuotes: false,
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inlineCharacterLimit: 12
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});
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console.log(pretty);
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/*
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{
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foo: "bar",
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arr: [1, 2, 3],
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nested: {
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hello: "world"
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}
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}
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*/
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```
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As you can see, `arr` was printed as a one-liner because its string was shorter than 12 characters.
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## License
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BSD-2-Clause © Yeoman team
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