Hvad betyder javascript:void(0)?
I JavaScript er javascript:void(0) en pseudo-URL, der ikke gør noget, når der klikkes på. Det bruges almindeligvis som en pladsholder i href-attributter for at forhindre browseren i at navigere til en ny side, mens den stadig udfører JavaScript-kode.
Brug af # i et ankermærke
Når du skriver følgende kode i editoren, opdateres websiden, efter at advarselsmeddelelsen er vist.
Eksempel:
html techcodeview.comtitle> <style>h1 { farve: grøn; } stil> hoved> <body> <h1>techcodeview.comh1> <h3>uden JavaScript:void(0)h3> <a href='#' ondblclick='alert('Welcome to Geeks for Geeks')'>Dobbeltklik på mig a> <a href='#' ondblclick='geeks()'>Dobbeltklik på mig a> <script>function geeks() { document.getElementById('gfg').innerHTML = 'Velkommen til techcodeview.com'; } script> <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='Hvad betyder javascript:void(0)?'> <p>Hvad betyder javascript:void(0)? </p> <h2> <b> <strong>Bruger javascript:void(0); i ankermærke </strong> </b> </h2> <p dir='ltr'> <span>Skriver javascript:void(0); in anchor tag kan forhindre siden i at genindlæse, og JavaScript-funktioner kan nemt kaldes ved enkelt- eller dobbeltklik. </span> </p> <p dir='ltr'> <b> <strong>Eksempel: </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 { farve: grøn; } stil> hoved> <body> <h1>techcodeview.comh1> <h3>JavaScript:void(0)h3> <a href='javascript:void(0);' ondblclick='geek()'>Dobbeltklik på mig a> <p id='gfg'>p> <script>function geek() { document.getElementById('gfg').innerHTML = 'Velkommen til 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='Hvad betyder javascript:void(0)?'> <p>Hvad betyder javascript:void(0)? </p> <br>
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