This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The effectiveType read-only property of the NetworkInformation interface returns the effective type of the connection meaning one of 'slow-2g', '2g', '3g', or '4g'. This value is determined using a combination of recently observed, round-trip time and downlink values.
var effectiveType = NetworkInformation.effectiveType
A String containing one of 'slow-2g', '2g', '3g', or '4g'.
| Specification | Status | Comment |
|---|---|---|
| Network Information API The definition of 'effectiveType' in that specification. | Draft | Initial definition. |
| Desktop | ||||||
|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
| Basic support | 61 | No | No | No | 48 | No |
| Mobile | |||||||
|---|---|---|---|---|---|---|---|
| Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | iOS Safari | Samsung Internet | |
| Basic support | 50 | 38 | ? | Yes | 37 | ? | ? |
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https://developer.mozilla.org/en-US/docs/Web/API/NetworkInformation/effectiveType