From da78a9e329e272dedb2400b79a3bdeebff387d47 Mon Sep 17 00:00:00 2001 From: Peter Bengtsson Date: Tue, 8 Dec 2020 14:42:17 -0500 Subject: initial commit --- .../global_objects/function/length/index.html | 148 +++++++++++++++++++++ 1 file changed, 148 insertions(+) create mode 100644 files/id/web/javascript/reference/global_objects/function/length/index.html (limited to 'files/id/web/javascript/reference/global_objects/function/length') diff --git a/files/id/web/javascript/reference/global_objects/function/length/index.html b/files/id/web/javascript/reference/global_objects/function/length/index.html new file mode 100644 index 0000000000..901c11b336 --- /dev/null +++ b/files/id/web/javascript/reference/global_objects/function/length/index.html @@ -0,0 +1,148 @@ +--- +title: Function.length +slug: Web/JavaScript/Reference/Global_Objects/Function/length +tags: + - Function + - JavaScript + - Property +translation_of: Web/JavaScript/Reference/Global_Objects/Function/length +--- +
{{JSRef}}
+ +

Properti length menentukan jumlah argumen yang diharapkan oleh fungsi.

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{{js_property_attributes(0,0,1)}}
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Deskripsi

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length merupakan properti dari objek fungsi, dan mengindikasikan berapa banyak argumen yang diharapkan fungsi, mis. jumlah parameter formal. Jumlah ini mengesampingkan {{jsxref("rest_parameters", "rest parameter", "", 1)}}. Sebaliknya, {{jsxref("Functions_and_function_scope/arguments/length", "arguments.length")}} adalah lokal untuk fungsi dan memberikan jumlah argumen sebenarnya ke fungsi.

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Properti data dari constructor Function

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Construktor {{jsxref("Function")}} sendiri adalah objek {{jsxref("Function")}}. data properti length bernilai 1. Properti atribut: Writable: false, Enumerable: false, Configurable: true.

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Properti dari Function prototype object

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Panjang properti dari prototype objek {{jsxref("Function")}} bernilai 0.

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Contoh

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console.log(Function.length); /* 1 */
+
+console.log((function()        {}).length); /* 0 */
+console.log((function(a)       {}).length); /* 1 */
+console.log((function(a, b)    {}).length); /* 2 etc. */
+
+console.log((function(...args) {}).length);
+// 0, rest parameter is not counted
+
+console.log((function(a, b = 1, c) {}).length);
+// 1, only parameters before the first one with
+// a default value is counted
+ +

Spesifikasi

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SpesifikasiStatusComment
{{SpecName('ES1')}}{{Spec2('ES1')}}Initial definition. Implemented in JavaScript 1.1.
{{SpecName('ES5.1', '#sec-15.3.5.1', 'Function.length')}}{{Spec2('ES5.1')}} 
{{SpecName('ES6', '#sec-function-instances-length', 'Function.length')}}{{Spec2('ES6')}}The configurable attribute of this property is now true.
{{SpecName('ESDraft', '#sec-function-instances-length', 'Function.length')}}{{Spec2('ESDraft')}} 
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Kompabilitas browser

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{{CompatibilityTable}}
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FeatureChromeFirefox (Gecko)Internet ExplorerOperaSafari
Basic support{{CompatVersionUnknown}}{{CompatVersionUnknown}}{{CompatVersionUnknown}}{{CompatVersionUnknown}}{{CompatVersionUnknown}}
Configurable: true{{CompatUnknown}}{{CompatGeckoDesktop(37)}}{{CompatUnknown}}{{CompatUnknown}}{{CompatUnknown}}
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FeatureAndroidChrome for AndroidFirefox Mobile (Gecko)IE MobileOpera MobileSafari Mobile
Basic support{{CompatVersionUnknown}}{{CompatVersionUnknown}}{{CompatVersionUnknown}}{{CompatVersionUnknown}}{{CompatVersionUnknown}}{{CompatVersionUnknown}}
Configurable: true{{CompatUnknown}}{{CompatUnknown}}{{CompatGeckoMobile(37)}}{{CompatUnknown}}{{CompatUnknown}}{{CompatUnknown}}
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Lihat juga

+ + -- cgit v1.2.3-54-g00ecf