![]() In JavaScript, the property of an object can be a method or a simple value. Thus, use these simple rules in order to know which object the 'this' refers to inside any function. this Refers to an Invoker Object (Parent Object). Example: this keyword inside inner function. And it is only relevant within the class. this points to global window object even if it is used in an inner function. So, first check whether a function is being called as callback function using bind()? If not then check whether a function is being called using call() or apply() with parmeter? If not then check whether a function is being called as an object function? Otherise check whether a function is being called in the global scope without dot notation or using window object. In these languages, the this keyword represents the current instance of the class. So these 4 rules applies to this keyword in order to determine which object this refers to. Although they are called logical, they can be applied to values of any type, not only boolean. ![]() Here we cover the first three, the operator is in the next article. In a large bowl, add the Café de Olla nut butter, applesauce, maple syrup, eggs, and vanilla extract. Thus, SomeFunction((obj)) will set this to obj by specifying (obj). There are four logical operators in JavaScript: (OR), & (AND), (NOT), (Nullish Coalescing). The current execution context is referred to as the this keyword. The this keyword refers to different objects depending on how it is used: Note this is not a variable. In-browser JavaScript can do everything related to webpage manipulation, interaction with the user, and the webserver. Which object depends on how this is being invoked (used or called). You can solve this problem by explicitly setting this value using bind() method. Every function, while executing, has a reference to its current execution context. In JavaScript, the this keyword refers to an object. In the above example, when you pass obj.WhoIsThis as a parameter to the SomeFunction() then this points to global window object insted of obj, because obj.WhoIsThis() will be executed as a global function by JavaScript engine.
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