Co oznacza javascript:void(0)?

Co oznacza javascript:void(0)?

W JavaScript javascript:void(0) to pseudoadres URL, który po kliknięciu nie powoduje żadnego działania. Jest powszechnie używany jako element zastępczy w atrybutach href, aby uniemożliwić przeglądarce przejście do nowej strony podczas wykonywania kodu JavaScript.

Używanie # w tagu zakotwiczenia

Podczas pisania poniższego kodu w edytorze strona internetowa zostanie odświeżona po wyświetleniu komunikatu ostrzegawczego.

Przykład:

HTML
          techcodeview.comtitle> <style>h1 { kolor: zielony;  } styl> głowa> <body>  <h1>techcodeview.comh1> <h3>bez JavaScript:void(0)h3> <a href='#' ondblclick='alert('Welcome to Geeks for Geeks')'>Kliknij dwukrotnie na mnie a> <a href='#' ondblclick='geeks()'>Kliknij dwukrotnie na mnie a> <script>funkcja geeks() { document.getElementById('gfg').innerHTML = 'Witamy w techcodeview.com';  } skrypt> <p id='gfg'>p> treść> html> </pre>  </code>  <p dir='ltr'>  <b>  <strong>Wyjście: </strong>  </b>  <span>  </span> </p>  <img src='//techcodeview.com/img/javascript-questions/07/what-does-javascript.webp' alt='Co oznacza javascript:void(0)?'> <p>Co oznacza javascript:void(0)? </p>  <h2>  <b>  <strong>Używanie javascript:void(0); w znaczniku zakotwiczenia </strong>  </b>  </h2> <p dir='ltr'> <span>Zapisywanie javascript:void(0); w tagu zakotwiczenia może uniemożliwić ponowne załadowanie strony, a funkcje JavaScript można łatwo wywołać po pojedynczym lub podwójnym kliknięciu. </span> </p>  <p dir='ltr'>  <b>  <strong>Przykład: </strong>  </b>  <span>  </span> </p>HTML <code>  <pre>  <html lang='en'>  <head>  <meta charset='UTF-8'>  <meta name='viewport' content='width=device-width,   initial-scale=1.0'>  <title>techcodeview.comtitle> <style>h1 { kolor: zielony;  } styl> głowa> <body>  <h1>techcodeview.comh1> <h3>JavaScript:void(0)h3> <a href='javascript:void(0);' ondblclick='geek()'>Kliknij dwukrotnie na mnie a> <p id='gfg'>p> <script>funkcja geek() { document.getElementById('gfg').innerHTML = 'Witamy w techcodeview.com';  } skrypt> treść> html> </pre>  </code>  <p dir='ltr'>  <b>  <strong>Wyjście: </strong>  </b>  <span>  </span> </p>  <img src='//techcodeview.com/img/javascript-questions/07/what-does-javascript-2.webp' alt='Co oznacza javascript:void(0)?'> <p>Co oznacza javascript:void(0)? </p>  <br>
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