unescape()

unescape(str): string

Unescapes HTML entities to their corresponding characters.

note

Unescapes &, <, >, ", and '.

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Parameters

str: string

The string to unescape.

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Returns: string

The unescaped string.

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See Also

escape

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Since

2.0.0

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Performance

O(n) time where n is string length. Single regex pass with object lookup.

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Also known as

unescape (Lodash, es-toolkit) · unescapeHtml (Modern Dash) · ❌ (Remeda, Radashi, Ramda, Effect, Antfu)

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Example

unescape('&lt;div&gt;');           // => '<div>'
unescape('a &amp; b');             // => 'a & b'
unescape('&quot;hello&quot;');     // => '"hello"'
unescape('&#39;quoted&#39;');      // => "'quoted'"

// Roundtrip with escape
const original = '<script>alert("XSS")</script>';
unescape(escape(original)) === original; // => true

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How it works?

Converts HTML entities back to their corresponding characters. Inverse of escape.

Entity Mapping

Entity	Character
&	&
&lt;	<
&gt;	>
&quot;	"
&#39;	'

Use Case

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Use Cases

Decode API responses for display 📌

Convert HTML entities from API content back to readable characters. Essential when displaying user-generated content stored with HTML encoding.

#decode#API#responses#HTML#entities#display

unescape("Tom & Jerry");
// => "Tom & Jerry"

Process CMS content for rendering 📌

Restore original characters from CMS or WYSIWYG editor output. Critical for headless CMS integrations where content comes pre-escaped.

#CMS#content#rendering#WYSIWYG#editor

unescape("<p>Welcome!</p>");
// => "<p>Welcome!</p>"

Roundtrip with escape for data integrity

Verify data integrity by ensuring escape/unescape roundtrips preserve content.

#roundtrip#escape#integrity#validation#testing

const original = '<script>alert("XSS")</script>';
unescape(escape(original)) === original; // => true