delete all existing HTML
delete
all existing HTML :
by this method we can clarify that our JavaScript code is wrong or right by opening it on web
page and its delete all existing html.
<!DOCTYPE
html>
<html>
<body>
<button onclick="document.write(15 + 6)"> click me</button>
<html>
<body>
<button onclick="document.write(15 + 6)"> click me</button>
<p>
click on button and you will see the result of (15+6) </p>
</body>
</html>
</body>
</html>
demo here
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