api.jquery.com/entries/jQuery.type.xml at 55b9329c606822d68ac3230ce331d65767717d4d · mgol/api.jquery.com · GitHub

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<?xml version="1.0"?>
<entry type="method" name="jQuery.type" return="String" deprecated="3.3" removed="4.0">
  <title>jQuery.type()</title>
  <signature>
    <added>1.4.3</added>
    <argument name="obj" type="Anything">
      <desc>Object to get the internal JavaScript [[Class]] of.</desc>
    </argument>
  </signature>
  <desc>Determine the internal JavaScript [[Class]] of an object.</desc>
  <longdesc>
    <div class="warning">
      <p>Note: This API has been deprecated in jQuery 3.3.</p>
    </div>
    <p>A number of techniques are used to determine the exact return value for an object. The [[Class]] is determined as follows:</p>
    <ul>
      <li>If the object is undefined or null, then "undefined" or "null" is returned accordingly.
        <ul>
          <li>jQuery.type( undefined ) === "undefined"</li>
          <li>jQuery.type() === "undefined"</li>
          <li>jQuery.type( window.notDefined ) === "undefined"</li>
          <li>jQuery.type( null ) === "null"</li>
        </ul>
      </li>
      <li>If the argument is either a primitive value or an instance of a standard built-in ECMAScript object, the [[Class]] internal property is used to determine the type. (<a href="http://perfectionkills.com/instanceof-considered-harmful-or-how-to-write-a-robust-isarray/">More details about this technique.</a>)
        <ul>
          <li>jQuery.type( true ) === "boolean"</li>
          <li>jQuery.type( new Boolean() ) === "boolean"</li>
          <li>jQuery.type( 3 ) === "number"</li>
          <li>jQuery.type( new Number( 3 ) ) === "number"</li>
          <li>jQuery.type( "test" ) === "string"</li>
          <li>jQuery.type( new String( "test" ) ) === "string"</li>
          <li>jQuery.type( function() {} ) === "function"</li>
          <li>jQuery.type( [] ) === "array"</li>
          <li>jQuery.type( new Array() ) === "array"</li>
          <li>jQuery.type( new Date() ) === "date"</li>
          <li>jQuery.type( new Error() ) === "error" // <strong>as of jQuery 1.9</strong></li>
          <li>jQuery.type( Symbol() ) === "symbol" // <strong>as of jQuery 1.9</strong></li>
          <li>jQuery.type( Object( Symbol() ) ) === "symbol" // <strong>as of jQuery 1.12</strong></li>
          <li>jQuery.type( /test/ ) === "regexp"</li>
        </ul>
      </li>
      <li>Everything else returns "object" as its type.</li>
    </ul>
  </longdesc>
  <category slug="utilities"/>
  <category slug="version/1.4.3"/>
  <category slug="deprecated/deprecated-3.3"/>
  <category slug="removed"/>
</entry>