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A processing instruction embeds application-specific instructions in XML which can be ignored by other applications that don't recognize them. Even if an XML processor ignores processing instructions, it will give them a place in the DOM.

A processing instruction is different from the XML declaration, which supplies information about the document such as character encoding, and can only appear as the first item in a document.

User-defined processing instructions cannot begin with 'xml', as these are reserved (such as <?xml-stylesheet ?>).

Processing instructions inherit methods and properties from Node.

Attributes

  • target (DOMString) — after the opening <? and before any whitespace separating it from data
  • data (DOMString) — the first non-whitespace character after target until before the closing ?>

Specification

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
ProcessingInstructionChrome Full support YesEdge Full support YesFirefox Full support YesIE ? Opera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesEdge Mobile ? Firefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android ?
targetChrome Full support YesEdge Full support 12Firefox Full support YesIE ? Opera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesEdge Mobile ? Firefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android ?
data
Deprecated
Chrome Full support YesEdge ? Firefox Full support YesIE ? Opera Full support YesSafari ? WebView Android Full support YesChrome Android Full support YesEdge Mobile ? Firefox Android Full support YesOpera Android Full support YesSafari iOS ? Samsung Internet Android ?

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown
Deprecated. Not for use in new websites.
Deprecated. Not for use in new websites.

See also

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