?????? ??
JavaScript? 4?? ???? ???? ??? ? ????.
window.alert()? ???? ?? ??? ?????.
HTML ??? ??? ??? document.write() ???? ?????.
innerHTML? ???? HTML ??? ???.
???? ??? ??? console.log()? ?????.
window.alert()
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文網(wǎng)(php.cn)</title>
<script src="/static/js/abc.js"></script><script>
function myFunction()
{
window.alert("Hello! 這是一個(gè)按鈕");
}
</script>
</head>
<body>
<input type="button" onclick="myFunction()" value="Show alert box">
</body>
</html>document.write()
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文網(wǎng)(php.cn)</title>
</head>
<body>
<h1>Head</h1>
<script>
document.write('<p>hello document</p>');
</script>
<h2>Tail</h2>
</html>innerHTML
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文網(wǎng)(php.cn)</title>
<script type="text/javascript">
function getInnerHTML(){
alert(document.getElementById("test").innerHTML);
}
</script>
</head>
<body>
<p id="test"><span color="#000">php中文網(wǎng)</span></p>
<input type="button" onclick="getInnerHTML()" value="點(diǎn)擊" />
</body>
</html>console.log()
????? ???? ???? ?? console.log() ???? ???? ????? JavaScript ?? ??? ? ????.
?????? F12? ???? ??? ??? ????? ??? ??? "??" ??? ?????.
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>php中文網(wǎng)(php.cn)</title> <script type="text/javascript"> a = 5; b = 6; c = a + b; console.log(c); </script> </head> <body> <p>在瀏覽器中使用F12來(lái)調(diào)試，在調(diào)試窗口中點(diǎn)擊 "Console"</p> </body> </html>
