Čo znamená javascript:void(0)?
V JavaScripte je javascript:void(0) pseudo-URL, ktorá po kliknutí nerobí nič. Bežne sa používa ako zástupný symbol v atribútoch href na zabránenie prehliadaču v navigácii na novú stránku, zatiaľ čo stále vykonáva kód JavaScript.
Použitie # v značke ukotvenia
Pri písaní nasledujúceho kódu v editore sa webová stránka po zobrazení výstražnej správy obnoví.
Príklad:
html techcodeview.comtitle> <style>h1 { farba: zelená; } štýl> hlava> <body> <h1>techcodeview.comh1> <h3>bez JavaScriptu:void(0)h3> <a href='#' ondblclick='alert('Welcome to Geeks for Geeks')'>Dvakrát kliknite na mňa a> <a href='#' ondblclick='geeks()'>Dvakrát kliknite na mňa a> <script>function geeks() { document.getElementById('gfg').innerHTML = 'Vitajte na techcodeview.com'; } skript> <p id='gfg'>p> body> html> </pre> </code> <p dir='ltr'> <b> <strong>Výkon: </strong> </b> <span> </span> </p> <img src='//techcodeview.com/img/javascript-questions/07/what-does-javascript.webp' alt='Čo znamená javascript:void(0)?'> <p>Čo znamená javascript:void(0)? </p> <h2> <b> <strong>Pomocou javascript:void(0); v kotvovej značke </strong> </b> </h2> <p dir='ltr'> <span>Zápis javascript:void(0); v kotevnej značke môže zabrániť opätovnému načítaniu stránky a funkcie JavaScriptu možno jednoducho volať jedným alebo dvojitým kliknutím. </span> </p> <p dir='ltr'> <b> <strong>Príklad: </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 { farba: zelená; } štýl> hlava> <body> <h1>techcodeview.comh1> <h3>JavaScript:void(0)h3> <a href='javascript:void(0);' ondblclick='geek()'>Dvakrát kliknite na mňa a> <p id='gfg'>p> <script>function geek() { document.getElementById('gfg').innerHTML = 'Vitajte na techcodeview.com'; } skript> telo> html> </pre> </code> <p dir='ltr'> <b> <strong>Výkon: </strong> </b> <span> </span> </p> <img src='//techcodeview.com/img/javascript-questions/07/what-does-javascript-2.webp' alt='Čo znamená javascript:void(0)?'> <p>Čo znamená javascript:void(0)? </p> <br>
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