- Unofficial / Note
Global user stats*:| Support: | 17.15% |
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| IE | Firefox | Chrome | Safari | Opera | iOS Safari | Opera Mini | Android Browser | Blackberry Browser | Opera Mobile | Chrome for Android | Firefox for Android | IE Mobile |
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| 5 versions back | 6.0: Supported | 25.0: Not supported | 30.0: Not supported | 4.0: Not supported | 17.0: Not supported | 3.2: Not supported | | 2.3: Not supported | | 11.0: Not supported | | | |
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| 4 versions back | 7.0: Supported | 26.0: Not supported | 31.0: Not supported | 5.0: Not supported | 18.0: Not supported | 4.0-4.1: Not supported | | 3.0: Not supported | | 11.1: Not supported | | | |
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| 3 versions back | 8.0: Supported | 27.0: Not supported | 32.0: Not supported | 5.1: Not supported | 19.0: Not supported | 4.2-4.3: Not supported | | 4.0: Not supported | | 11.5: Not supported | | | |
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| 2 versions back | 9.0: Supported | 28.0: Not supported | 33.0: Not supported | 6.0: Not supported | 20.0: Not supported | 5.0-5.1: Not supported | | 4.1: Not supported | | 12.0: Not supported | | | |
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| Previous version | 10.0: Supported | 29.0: Not supported | 34.0: Not supported | 6.1: Not supported | 21.0: Not supported | 6.0-6.1: Not supported | | 4.2-4.3: Not supported | 7.0: Not supported | 12.1: Not supported | | | |
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| Current | 11.0: Supported | 30.0: Not supported | 35.0: Not supported | 7.0: Not supported | 22.0: Not supported | 7.0-7.1: Not supported | 5.0-7.0: Not supported | 4.4: Not supported | 10.0: Not supported | 22.0: Not supported | 35.0: Not supported | 30.0: Not supported | 10.0: Not supported |
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| Near future | | 31.0: Not supported | 36.0: Not supported | 8.0: Not supported | 23.0: Not supported | 8.0: Not supported | | 4.4.3: Not supported | | | | | |
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| Farther future | | 32.0: Not supported | 37.0: Not supported | | 24.0: Not supported | | | | | | | | |
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| 3 versions ahead | | 33.0: Not supported | 38.0: Not supported | | | | | | | | | | |
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Note: Proposal by Microsoft, being considered for W3C standardization.