defer attribute for external scripts
- LSThe boolean defer attribute on script elements allows the external JavaScript file to run when the DOM is loaded, without delaying page load first.
Chrome
- 4 - 7: Not supported
- 8 - 122: Supported
- 123: Supported
- 124 - 126: Supported
Edge
- 12 - 122: Supported
- 123: Supported
Safari
- 3.1 - 4: Not supported
- 5 - 17.3: Supported
- 17.4: Supported
- TP: Supported
Firefox
- 2 - 3: Not supported
- 3.5 - 30: Supported
- 31 - 123: Supported
- 124: Supported
- 125 - 127: Supported
Opera
- 9 - 12.1: Not supported
- 15 - 107: Supported
- 108: Supported
IE
- 5.5 - 9: Partial support
- 10: Supported
- 11: Supported
Chrome for Android
- 122: Supported
Safari on iOS
- 3.2 - 4.3: Not supported
- 5 - 17.3: Supported
- 17.4: Supported
Samsung Internet
- 4 - 22: Supported
- 23: Supported
Opera Mini
- all: Not supported
Opera Mobile
- 10 - 12.1: Not supported
- 80: Supported
UC Browser for Android
- 15.5: Supported
Android Browser
- 2.1 - 2.3: Not supported
- 3 - 4.4.4: Supported
- 122: Supported
Firefox for Android
- 123: Supported
QQ Browser
- 14.9: Supported
Baidu Browser
- 13.52: Supported
KaiOS Browser
- 2.5: Supported
- 3: Supported