importsayHellofrom'./module.js';import{defaultassayHello}from'./module';//实际上是 //三种方法,一种是在export时使用as,两种是在import时使用// 第一种 export 时使用 as 重命名functiongetArea() {returnthis.width*this.height; }export{getAreaasgetAreaMod}/**导入**/import{getAreaMod}from'./module....
model:"Accord", year:1998};/*Logs 'Honda'*/console.log(mycar.brand);/*Pass object reference to the function*/myFunc(mycar);/** Logs 'Toyota' as the value of the 'brand' property of the object, as changed to by the function.*/console.log(mycar.brand); 关键字this并不指向当前正在...
As you can see, the function's name doesn't get hoisted if it is part of a function expression.And that is how variable and function hoisting works in JavaScript.Thanks for reading!Joshua ClantonWant to improve your JavaScript skills? Subscribe to A Drip of JavaScript for biweekly tips to...
A JavaScript function can also be defined using anexpression. A function expression can be stored in a variable: Example varx =function(a, b) {return a * b}; Try it Yourself » After a function expression has been stored in a variable, the variable can be used as a function: ...
In our case, we passed 3 as an argument to the function. So, the function returns the square of 3, which is 9, to the function call. We then stored this return value in the square variable and printed it. Working of JavaScript Functions The return Statement Terminates the Function Any...
JavaScript: When assigning an anonymous function to a variable, function return value is not passed, rather the function as a string,程序员大本营,技术文章内容聚合第一站。
Learn how to use the apply() method in JavaScript to call functions with a specified this value and arguments provided as an array.
Lexical scoping, also known as static scoping, is a fundamental concept in JavaScript that determines how variable names are resolved at runtime based on their location in the source code. In lexical scoping, the scope of a variable is determined by its position or context in the code structur...
On the other hand, when an object is created with an object literal, any object variable derived from that object will act as a clone of the original object. Hence, changes you make in one object will be reflected in the other. For example, // use object lateral let person = { name...
Using the window object as a variable can easily crash your program. Invoking a Function as a Method In JavaScript you can define function as object methods. The following example creates an object (myObject), with two properties (firstNameandlastName), and a method (fullName): ...