Two commonly used client output methods
document.write(str)
Description: In the <body> tag of the web page, output the content of str.
Document means "document", which is the entire web page.
Document is a document object that represents the entire web page.
write() is an output method of the document object.
"." Decimal point: Call the object's method through the decimal point (.).
str: Indicates the content to be output.
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>php.cn</title>
<script type="text/javascript">
//在<body>中输出一句话
document.write("欢迎来到php.cn");
</script>
</head>
<body>
</body>
</html>
##window.alert(str)
- Description: Pops up a warning dialog box in the current window, str is the content displayed in the dialog box.
- window represents the current browser window, and window is a window object.
- alert() method: Pops up a dialog box.
- str: Indicates the content to be output.
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>php.cn</title>
<script type="text/javascript">
//打开网页时，弹出一个对话框
window.alert("欢迎来到php.cn");
</script>
</head>
<body>
</body>
</html>
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