Vad betyder javascript:void(0)?

Vad betyder javascript:void(0)?

I JavaScript är javascript:void(0) en pseudo-URL som inte gör något när man klickar på den. Det används vanligtvis som en platshållare i href-attribut för att förhindra webbläsaren från att navigera till en ny sida medan den fortfarande kör JavaScript-kod.

Använder # i en ankartagg

När du skriver följande kod i editorn uppdateras webbsidan efter att varningsmeddelandet visas.

Exempel:

html
          techcodeview.comtitle> <style>h1 { färg: grön;  } stil> huvud> <body>  <h1>techcodeview.comh1> <h3>utan JavaScript:void(0)h3> <a href='#' ondblclick='alert('Welcome to Geeks for Geeks')'>Dubbelklicka på mig a> <a href='#' ondblclick='geeks()'>Dubbelklicka på mig a> <script>function geeks() { document.getElementById('gfg').innerHTML = 'Välkommen till techcodeview.com';  } skript> <p id='gfg'>p> body> html> </pre>  </code>  <p dir='ltr'>  <b>  <strong>Produktion: </strong>  </b>  <span>  </span> </p>  <img src='//techcodeview.com/img/javascript-questions/07/what-does-javascript.webp' alt='Vad betyder javascript:void(0)?'> <p>Vad betyder javascript:void(0)? </p>  <h2>  <b>  <strong>Använder javascript:void(0); i ankartagg </strong>  </b>  </h2> <p dir='ltr'> <span>Skriver javascript:void(0); in anchor tag kan förhindra att sidan laddas om och JavaScript-funktioner kan enkelt anropas vid enkel- eller dubbelklick. </span> </p>  <p dir='ltr'>  <b>  <strong>Exempel: </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 { färg: grön;  } stil> huvud> <body>  <h1>techcodeview.comh1> <h3>JavaScript:void(0)h3> <a href='javascript:void(0);' ondblclick='geek()'>Dubbelklicka på mig a> <p id='gfg'>p> <script>function geek() { document.getElementById('gfg').innerHTML = 'Välkommen till techcodeview.com';  } script> body> html> </pre>  </code>  <p dir='ltr'>  <b>  <strong>Produktion: </strong>  </b>  <span>  </span> </p>  <img src='//techcodeview.com/img/javascript-questions/07/what-does-javascript-2.webp' alt='Vad betyder javascript:void(0)?'> <p>Vad betyder javascript:void(0)? </p>  <br>
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