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Browser | Language | DOM capabilities |
|---|---|---|
Netscape 2 | JavaScript 1.0 | Form manipulation |
Netscape 3 | JavaScript 1.1 | Image rollovers |
Netscape 4 | JavaScript 1.2 | DHTML with Layers |
Netscape 4.5 | JavaScript 1.3 | DHTML with Layers |
Netscape 6 / Mozilla | JavaScript 1.5 | Substantial support for W3C DOM standard; support for Layers discontinued |
IE 3 | JScript 1.0/2.0 | Form manipulation |
IE 4 | JScript 3.0 | Image rollovers; DHTML with document.all[] |
IE 5 | JScript 5.0 | DHTML with document.all[] |
IE 5.5 | JScript 5.5 | Partial support for W3C DOM standard |
IE 6 | JScript 5.5 | Partial support for W3C DOM standard; lacks support for W3C DOM event model |
Version | Description |
|---|---|
JavaScript 1.0 | The original version of the language. It was buggy and is now essentially obsolete. Implemented by Netscape 2. |
JavaScript 1.1 | Introduced a true Array object; most serious bugs resolved. Implemented by Netscape 3. |
JavaScript 1.2 | Introduced the switch statement, regular expressions, and a number of other features. Almost compliant with ECMA v1, but has some incompatibilities. Implemented by Netscape 4. |
JavaScript 1.3 | Fixed incompatibilities of JavaScript 1.2. Compliant with ECMA v1. Implemented by Netscape 4.5. |
JavaScript 1.4 | Implemented only in Netscape server products. |
JavaScript 1.5 | Introduced exception handling. Compliant with ECMA v3. Implemented by Mozilla and Netscape 6. |
JScript 1.0 | Roughly equivalent to JavaScript 1.0. Implemented by early releases of IE 3. |
JScript 2.0 | Roughly equivalent to JavaScript 1.1. Implemented by later releases of IE 3. |
JScript 3.0 | Roughly equivalent to JavaScript 1.3. Compliant with ECMA v1. Implemented by IE 4. |
JScript 4.0 | Not implemented by any web browser. |
JScript 5.0 | Supported exception handling. Partially compliant with ECMA v3. Implemented by IE 5. |
JScript 5.5 | Roughly equivalent to JavaScript 1.5. Fully compliant with ECMA v3. Implemented by IE 5.5 and IE 6. (IE 6 actually implements JScript 5.6, but 5.6 is not different from 5.5 in any way that is relevant to client-side JavaScript programmers.) |
ECMA v1 | The first standard version of the language. Standardized the basic features of JavaScript 1.1 and added a few new features. Did not standardize the switch statement or regular expression support. Conformant implementations are JavaScript 1.3 and JScript 3.0. |
ECMA v2 | A maintenance release of the standard that included clarifications but defined no new features. |
ECMA v3 | Standardized the switch statement, regular expressions, and exception handling. Conformant implementations are JavaScript 1.5 and JScript 5.5. |
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