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1. developer.mozilla.org › en-US › docsthis - JavaScript | MDN - MDN Web Docs

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   Mar 31, 2024 · Description. The value of this depends on in which context it appears: function, class, or global. Function context. Inside a function, the value of this depends on how the function is called.

2. developer.mozilla.org › en-US › docsJavaScript | MDN - MDN Web Docs

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   Mar 5, 2024 · Learn more about the behavior of JavaScript's operators instanceof, typeof, new, this, the operator precedence, and more. Statements and declarations. Learn how do-while, for-in, for-of, try-catch, let, var, const, if-else, switch, and more JavaScript statements and keywords work. Functions.

3. devdoc.net › docs › JavaScriptthis - JavaScript | MDN

   devdoc.net › docs › JavaScript

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   Jun 16, 2017 · this. In This Article. A function's this keyword behaves a little differently in JavaScript compared to other languages. It also has some differences between strict mode and non-strict mode. In most cases, the value of this is determined by how a function is called.

4. javascript.info › object-methodsObject methods, "this" - The Modern JavaScript Tutorial

   javascript.info › object-methods

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   May 18, 2024 · It’s common that an object method needs to access the information stored in the object to do its job. For instance, the code inside user.sayHi() may need the name of the user. To access the object, a method can use the this keyword. The value of this is the object “before dot”, the one used to call the method.

5. developer.mozilla.org › en-US › docsin - JavaScript | MDN - MDN Web Docs

   developer.mozilla.org › en-US › docs

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   Feb 18, 2024 · Description. The in operator tests if a string or symbol property is present in an object or its prototype chain. If you want to check for only non-inherited properties, use Object.hasOwn() instead. A property may be present in an object but have value undefined. Therefore, x in obj is not the same as obj.x !== undefined.

6. www.w3schools.com › js › js_thisJavaScript this - W3Schools

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   In JavaScript, the this keyword refers to an object. The this keyword refers to different objects depending on how it is used: In an object method, this refers to the object. Alone, this refers to the global object. In a function, this refers to the global object. In a function, in strict mode, this is undefined.

7. People also ask

   What is a method in JavaScript?

   • Methods allow objects to “act” like object.doSomething(). Methods can reference the object as this. The value of this is defined at run-time. When a function is declared, it may use this, but that this has no value until the function is called. A function can be copied between objects.

   Object methods, "this" - The Modern JavaScript Tutorial

   javascript.info/object-methods

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   What does 'this is my string' mean in JavaScript?

   • When a function is called as a method of an object, an instance of this inside that method refers to the object that contains the method, giving access to the methods and properties that sit alongside it: myValue: "This is my string.", myMethod() { console.log( this.myValue ); > "This is my string."

   The this keyword | web.dev

   web.dev/learn/javascript/functions/this

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   What does bind() mean in JavaScript?

   • In an event, this refers to the element that received the event. Methods like call(), apply() , and bind() can refer this to any object. this is not a variable. It is a keyword. You cannot change the value of this. When used in an object method, this refers to the object. In the example on top of this page, this refers to the person object.

   JavaScript this - W3Schools

   www.w3schools.com/js/js_this.asp

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   What is JavaScript JS?

   • This page was last modified on Mar 5, 2024 by MDN contributors. JavaScript (JS) is a lightweight interpreted (or just-in-time compiled) programming language with first-class functions. While it is most well-known as the scripting language for Web pages, many non-browser environments also use it, such as Node.js, Apache CouchDB and Adobe Acrobat.

   JavaScript | MDN - MDN Web Docs

   developer.mozilla.org/en-US/docs/Web/JavaScript

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8. web.dev › learn › javascriptThe this keyword | web.dev

   web.dev › learn › javascript

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   Mar 31, 2024 · In Node.js, globalThis is the global object: $ node. Welcome to Node.js v20.10.0. Type ".help" for more information. > this. <ref *1> Object [global] { ... } Outside strict mode, this also refers to the global object inside a standalone function, because the parent Window is the object that effectively "owns" those functions.