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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).
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',
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 ).
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?
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.
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.
Nov 7, 2023 · Void (0) is an operator that checks a given value and returns undefined. A function is considered void if it returns nothing. The void (0) operator can be used in many areas. For instance, you can have JavaScript return undefined when you click an anchor tag.
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?
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.
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 ").
