45 lines
1.2 KiB
Markdown
45 lines
1.2 KiB
Markdown
# js-string-escape
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[](https://travis-ci.org/joliss/js-string-escape)
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Escape any string to be a valid JavaScript string literal between double
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quotes or single quotes.
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## Installation
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```
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npm install js-string-escape
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```
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## Example
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If you need to generate JavaScript output, this library will help you safely
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put arbitrary data in JavaScript strings:
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```js
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jsStringEscape = require('js-string-escape')
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console.log('"' + jsStringEscape('Quotes (\", \'), newlines (\n), etc.') + '"')
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// => "Quotes (\", \'), newlines (\n), etc."
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```
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In other words, given any string `s`, the following invariants hold:
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```js
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eval('"' + jsStringEscape(s) + '"') === s
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eval("'" + jsStringEscape(s) + "'") === s
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```
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These `eval` expressions are safe with untrusted strings `s`.
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Non-strings will be cast to strings.
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## Compliance
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This library has been checked against [ECMAScript
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5.1](http://www.ecma-international.org/ecma-262/5.1/#sec-7.8.4) and tested
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against all Unicode code points.
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Note that the returned string is not necessarily valid JSON, since JSON
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disallows control characters, and `\'` is illegal in JSON.
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