typeof()傳回 屬性。 public string GetTypeOfProperty (string propertyName); 參數 propertyName String 屬性的名稱。 傳回 String 其中一個 “undefined”、“object”、“boolean”、“number”、“bigint”、“string”、“symbol” 或“function”。 適用於 產品版本 net-9.0 net-9.0...
consthome="c:\\temp"; 也可以在换行之前加上反斜杠以转义换行。这样反斜杠和换行都不会出现在字符串的值中。 js conststr="this string \ is broken \ across multiple \ lines.";console.log(str);// this string is broken across multiple lines....
/*@__KEY__*/ - Marks a string literal as a property to also mangle it when mangling properties. /*@__MANGLE_PROP__*/ - Opts-in an object property (or class field) for mangling, when the property mangler is enabled. You can use either a @ sign at the start, or a #. Here ar...
The Object.getOwnPropertyDescriptor() method returns a property descriptor for a specific property of an object. Example let obj = {num: 10} // get the property description // of the num property of obj let numValue = Object.getOwnPropertyDescriptor(obj, "num"); console.log(numValue);...
Returns typeof() of the property. C# Copy public string GetTypeOfProperty (string propertyName); Parameters propertyName String The name of the property. Returns String One of "undefined", "object", "boolean", "number", "bigint", "string", "symbol" or "function". Applies t...
Returns typeof() of the property. C# Copy public string GetTypeOfProperty (string propertyName); Parameters propertyName String The name of the property. Returns String One of "undefined", "object", "boolean", "number", "bigint", "string", "symbol" or "function". Applies t...
Object.getOwnPropertyDescriptor("foo",0);// TypeError: "foo" is not an object // ES5 codeObject.getOwnPropertyDescriptor("foo",0);// Object returned by ES2015 code: {// configurable: false,// enumerable: true,// value: "f",// writable: false// } ...
ES5 有一个Object.getOwnPropertyDescriptor方法,返回某个对象属性的描述对象( descriptor )。 var obj = { p: 'a' }; Object.getOwnPropertyDescriptor(obj, 'p') // Object { value: "a", // writable: true, // enumerable: true, // configurable: true ...
JSDOM object API Once you have constructed a JSDOM object, it will have the following useful capabilities: Properties The property window retrieves the Window object that was created for you. The properties virtualConsole and cookieJar reflect the options you pass in, or the defaults created for...
Object.prototype:作为所有正常对象的默认原型,不能再给它设置原型了。 String: 为了支持下标运算,String 的正整数访问会去字符串里面查找。 Arguments:arguments 的非负整数型下标属性跟对应的变量联动。 functionf(a,b,c,d,e,f,g) {console.log(arguments); ...