Apa Yang Sebenarnya Dilakukan `javascript:void(0)`?

Membuka kunci Enigma "javascript:void(0)"

JavaScript, bahasa pengaturcaraan di mana-mana yang digunakan secara meluas dalam pembangunan web, menawarkan pelbagai operator terbina dalam, masing-masing mempunyai tujuan tertentu. Salah satu pengendali sedemikian yang telah menimbulkan rasa ingin tahu ramai ialah operator "kosong" yang penuh teka-teki, yang sering ditemui dalam coretan kod seperti:

``` What exactly does this operator entail? **Understanding the Void Operator** The void operator in JavaScript has a peculiar function. When applied to an expression, it evaluates the expression and returns a special value - undefined. **Why Use the Void Operator in "javascript:void(0)"?** The void operator is often employed in conjunction with the "javascript:" URL schema. When applied to an anchor's href attribute, as in the example above, the purpose is to prevent execution and display of the evaluation result. **A Practical Application** Consider the typical scenario of a web page that includes a link for user login. By default, a javascript: URL would prompt the browser to redirect to a plain text version of the JavaScript evaluation output, such as "undefined." However, by utilizing void(0) as the href value, the link's click action will not cause redirection.

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