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HTMLSelectElement.checkValidity() 方法會檢查元素是否有任何的檢核、驗證條件，並且檢查是否滿足這些條件。如果元素沒有通過這些檢核，瀏覽器會於該元素上觸發一個可取消的 invalid 事件，並回傳 false。
語法
var result = selectElt.checkValidity();規範
| Specification | Status | Comment |
|---|---|---|
| HTML Living Standard The definition of 'HTMLSelectElement.checkValidity()' in that specification. |
Living Standard | No change since the latest snapshot, HTML5. |
| HTML5 The definition of 'HTMLSelectElement.checkValidity()' in that specification. |
Recommendation | Initial definition, snapshot of HTML Living Standard |
瀏覽器相容性
We're converting our compatibility data into a machine-readable JSON format.
This compatibility table still uses the old format,
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| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | 4.0 (2.0) | 10 | (Yes) | (Yes) |
| Feature | Android | Chrome | Edge | Firefox Mobile (Gecko) | Firefox OS | IE Phone | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|---|---|
| Basic support | ? | (Yes) | (Yes) | 4.0 (2.0) | 1.0 | ? | ? | (Yes) |