![]() ![]() 如果您需要相容過時的不支援 fineProperty 的 JavaScript 引擎,最好不要使用 polyfill 來填充 Array.prototype 方法,因為無法使它們成為不可枚舉的(non-enumerable)屬性。 規範 SpecificationĮCMAScript Language Specification # īCD tables only load in the browser with JavaScript enabled. ![]() ![]() If no element of the array satisfies the. Object.prototype._lookupSetter_() (en-US) 已棄用 The findIndex() method returns the index of the first element in the array that satisfies the provided testing function. The findIndex() method returns the index of the first element in array that satisfies the given testing function.Object.prototype._lookupGetter_() (en-US) 已棄用 Narrator The array methods find and findIndex are used when you only need to return a single value within an array.Object.prototype._defineSetter_() (en-US) 已棄用.Object.prototype._defineGetter_() (en-US) 已棄用 The findIndex () method returns the index of the element that satisfies a testing function or -1 if no element passed the test. ![]()
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