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Aug 18, 2009 · void is a keyword which, when supplied with a parameter of 0 returns undefined, which does not use any more resources to handle a return value that would occur without specifying the 0 (it is more memory-management/performance friendly).
Dec 5, 2012 · void [MDN] is a prefix keyword that takes one argument and always returns undefined. Examples. console.log(void 0); console.log(void (0)); console.log(void "hello"); console.log(void (new Date())); //all will return undefined. What's the point of that? It seems pretty useless, doesn't it?
Oct 27, 2020 · void(0) The void operator evaluates given expressions and returns undefined. For example: const result = void(1 + 1); . console.log(result); // undefined. 1 + 1 is evaluated but undefined is returned. To confirm that, here's another example: <body> <h1>Heading</h1> <script> . void(document.body.style.backgroundColor = 'red',
Jan 3, 2020 · Use javascript:void(0) if, when a link is clicked, you don’t want the browser to load a new page or refresh the same page (depending on the URL specified). Instead it will just perform the JavaScript attached to that link.
Jun 4, 2024 · In JavaScript, javascript:void(0) is a common expression used within hyperlinks to prevent the default behavior of the link, such as reloading the page or navigating to a new page. This expression is frequently encountered but often misunderstood by many developers.
Feb 27, 2021 · The 0 inside the void operator is simply used as a placeholder. By using javascript:void(0), the <a> tag won’t send you to other web address. It also won’t refresh the page as links usually do when you put / as the value of href attribute. You may wonder then why not just remove the href attribute?
Jan 31, 2023 · The purpose of using javascript:void(0) as the href value is to prevent the page from refreshing and changing the URL when the link is clicked. It's often used when a link is desired but no action is needed to happen.
May 6, 2024 · This operator allows evaluating expressions that produce a value into places where an expression that evaluates to undefined is desired. The void operator is often used merely to obtain the undefined primitive value, usually using void(0) (which is equivalent to void 0 ).
Jul 23, 2019 · The void operator in JavaScript evaluates an expression and returns undefined. At first glance, this operator doesn't seem useful, but there are 3 cases where you may see the void operator in practice. Here are the 3 major use cases: No Overwriting undefined. Surprisingly enough, undefined is a valid variable name in JavaScript.
Jun 19, 2017 · This operator allows evaluating expressions that produce a value into places where an expression that evaluates to undefined is desired. The void operator is often used merely to obtain the undefined primitive value, usually using " void(0) " (which is equivalent to " void 0 ").
