Resource Hints: preconnect
- WDGives a hint to the browser to begin the connection handshake (DNS, TCP, TLS) in the background to improve performance. This is indicated using <link rel="preconnect" href="https://example-domain.com/">
IE
- 5.5 - 10: Not supported
- 11: Not supported
Edge
- 12 - 14: Not supported
- 15 - 18: Partial support
- 79 - 86: Supported
- 87: Supported
Firefox
- 2 - 38: Not supported
- 39: Supported
- 40 - 70: Supported
- 71 - 83: Not supported
- 84: Not supported
- 85 - 86: Not supported
Chrome
- 4 - 45: Not supported
- 46 - 86: Supported
- 87: Supported
- 88 - 90: Supported
Safari
- 3.1 - 11: Not supported
- 11.1 - 13.1: Supported
- 14: Supported
- TP: Supported
Opera
- 9 - 32: Not supported
- 33 - 71: Supported
- 72: Supported
iOS Safari
- 3.2 - 11.2: Not supported
- 11.3 - 13.7: Supported
- 14: Supported
Opera Mini
- all: Not supported
Android Browser
- 2.1 - 4.4.4: Not supported
- 81: Supported
Opera Mobile
- 10 - 12.1: Not supported
- 59: Supported
Chrome for Android
- 87: Supported
Firefox for Android
- 83: Support unknown
UC Browser for Android
- 12.12: Support unknown
Samsung Internet
- 4: Not supported
- 5 - 12.0: Supported
- 13.0: Supported
QQ Browser
- 10.4: Supported
Baidu Browser
- 7.12: Supported
KaiOS Browser
- 2.5: Supported
- Resources:
- Eliminating Roundtrips with Preconnect