ProcessingInstruction - Web APIs 编辑

The ProcessingInstruction interface represents a processing instruction; that is, a Node which embeds an instruction targeting a specific application but that can be ignored by any other applications which don't recognize the instruction.

A processing instruction is different from the XML declaration.

User-defined processing instructions cannot begin with "xml", as xml-prefixed processing-instruction target names are reserved by the XML specification for particular, standard uses (see, for example, <?xml-stylesheet ?>).

The ProcessingInstruction interface inherits methods and properties from Node.

  <div id="interfaceDiagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 10%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 700 70" preserveAspectRatio="xMinYMin meet"><a xlink:href="/wiki/en-US/docs/Web/API/EventTarget" target="_top"><rect x="1" y="1" width="110" height="50" fill="#fff" stroke="#D4DDE4" stroke-width="2px" /><text  x="56" y="30" font-size="12px" font-family="Consolas,Monaco,Andale Mono,monospace" fill="#4D4E53" text-anchor="middle" alignment-baseline="middle">EventTarget</text></a><polyline points="111,25  121,20  121,30  111,25" stroke="#D4DDE4" fill="none"/><line x1="121" y1="25" x2="151" y2="25" stroke="#D4DDE4"/><a xlink:href="https://developer.mozilla.org/wiki/en-US/docs/Web/API/Node" target="_top"><rect x="151" y="1" width="75" height="50" fill="#fff" stroke="#D4DDE4" stroke-width="2px" /><text  x="188.5" y="30" font-size="12px" font-family="Consolas,Monaco,Andale Mono,monospace" fill="#4D4E53" text-anchor="middle" alignment-baseline="middle">Node</text></a><polyline points="226,25  236,20  236,30  226,25" stroke="#D4DDE4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#D4DDE4"/><a xlink:href="/wiki/en-US/docs/Web/API/CharacterData" target="_top"><rect x="266" y="1" width="130" height="50" fill="#fff" stroke="#D4DDE4" stroke-width="2px" /><text  x="331" y="30" font-size="12px" font-family="Consolas,Monaco,Andale Mono,monospace" fill="#4D4E53" text-anchor="middle" alignment-baseline="middle">CharacterData</text></a><polyline points="396,25  406,20  406,30  396,25" stroke="#D4DDE4" fill="none"/><line x1="406" y1="25" x2="436" y2="25" stroke="#D4DDE4"/><a xlink:href="/wiki/en-US/docs/Web/API/ProcessingInstruction" target="_top"><rect x="436" y="1" width="210" height="50" fill="#F4F7F8" stroke="#D4DDE4" stroke-width="2px" /><text  x="541" y="30" font-size="12px" font-family="Consolas,Monaco,Andale Mono,monospace" fill="#4D4E53" text-anchor="middle" alignment-baseline="middle">ProcessingInstruction</text></a></svg></div>

  a:hover text { fill: #0095DD; pointer-events: all;}

Properties

target (DOMString) Read only

A name identifying the application to which the instruction is targeted,

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• document.createProcessingInstruction