This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2018.
The type read-only property of the HTMLFieldSetElement interface returns the string "fieldset".
The string "fieldset".
const fs = document.querySelector("fieldset");
console.log(fs.type); // "fieldset"
| Specification |
|---|
| HTML> # dom-fieldset-type-dev> |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | WebView on iOS | |
type |
19 | 17 | 4 | 15 | 6 | 25 | 4 | 14 | 6 | 1.0 | 4.4 | 6 |
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https://developer.mozilla.org/en-US/docs/Web/API/HTMLFieldSetElement/type