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JavaScript Version Information

[This documentation is for preview only, and is subject to change in later releases. Blank topics are included as placeholders.]

Different versions of JavaScript support different sets of JavaScript elements. Metro style apps support a slightly different set of features from Internet Explorer 10. Moreover, standards mode (the mode used in all current versions of Internet Explorer when there is a <!doctype> directive) supports a different set of elements than quirks mode (the mode used when there is no <!doctype> directive). For more information about versioning, see Defining Document Compatibility.

The following sections describe the sets of JavaScript elements that are not supported by particular versions of JavaScript.

Deprecated in Windows Metro style apps

The following elements are supported in Internet Explorer 10, but not in Metro style apps.

  1. ActiveXObject Object (JavaScript) is supported in Internet Explorer but not in Metro style apps.

  2. Conditional Compilation (JavaScript) is supported in Internet Explorer but not in Metro style apps.

  3. Enumerator Object (JavaScript) is supported in Internet Explorer but not in Metro style apps.

  4. getVarDate Method (JavaScript) is supported in Internet Explorer but not in Metro style apps.

  5. HTML Wrappers are supported in Internet Explorer but not in Metro style apps.

  6. VBArray Object (JavaScript) is supported in Internet Explorer but not in Metro style apps.

Supported in both Metro style apps and Internet Explorer 10 (standards mode)

  1. Strict Mode (JavaScript) is supported in Internet Explorer 10 and Metro style apps.

  2. Error Object (JavaScript) object has two new properties: stack Property (JavaScript) and stackTraceLimit Property (JavaScript) in Internet Explorer 10 and Metro style apps.

  3. Typed arrays are supported in both Internet Explorer 10 and Metro style apps. For more information about typed arrays, see the reference for individual typed array objects, for example Float32Array Object.

  4. WinRTError Object (JavaScript) is supported in Metro style apps but not in Internet Explorer.

Not supported in Internet Explorer 8 (standards mode) and Quirks mode

  1. Array Object (JavaScript) . The following methods are not supported in Internet Explorer 8 standards mode and Quirks mode:

    1. every Method (JavaScript)

    2. filter Method (JavaScript)

    3. forEach Method (JavaScript)

    4. indexOf Method (Array) (JavaScript)

    5. Array.isArray Function (JavaScript)

    6. lastIndexOf Method (Array) (JavaScript)

    7. map Method (JavaScript)

    8. reduce Method (JavaScript)

    9. reduceRight Method (JavaScript)

    10. some Method (JavaScript)

  2. bind Method (JavaScript) is not supported in Internet Explorer 8 standards mode and Quirks mode.

  3. trim Method (JavaScript) is not supported in Internet Explorer 8 standards mode and Quirks mode.

  4. Formatting Date and Time Strings (JavaScript) is not supported in Internet Explorer 8 standards mode and Quirks mode.

  5. JSON Object (JavaScript) : supported in Internet Explorer 8, not in Quirks mode

  6. Object Object (JavaScript) :

    1. Object.create Function (JavaScript) is not supported in Internet Explorer 8 standards mode and Quirks mode.

    2. Object.defineProperties Function (JavaScript) : supported in Internet Explorer 8 for DOM objects only, otherwise not supported.

    3. Object.freeze Function (JavaScript) is not supported in Internet Explorer 8 standards mode and Quirks mode.

    4. Object.getOwnPropertyDescriptor Function (JavaScript) : supported in Internet Explorer 8 for DOM objects only, otherwise not supported

    5. Object.getOwnPropertyNames Function (JavaScript) is not supported in Internet Explorer 8 standards mode and Quirks mode.

    6. Object.getPrototypeOf Function (JavaScript) is not supported in Internet Explorer 8 standards mode and Quirks mode.

    7. Object.isExtensible Function (JavaScript) is not supported in Internet Explorer 8 standards mode and Quirks mode.

    8. Object.isFrozen Function (JavaScript) is not supported in Internet Explorer 8 standards mode and Quirks mode.

    9. Object.isSealed Function (JavaScript) is not supported in Internet Explorer 8 standards mode and Quirks mode.

    10. Object.keys Function (JavaScript) is not supported in Internet Explorer 8 standards mode and Quirks mode.

    11. Object.preventExtensions Function (JavaScript) is not supported in Internet Explorer 8 standards mode and Quirks mode.

    12. Object.seal Function (JavaScript) is not supported in Internet Explorer 8 standards mode and Quirks mode.

Other Resources

JavaScript Language Reference
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