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What is the function that javascript can use to implement warning boxes?
- 青灯夜游Original
- 2022-02-21 18:02:454156browse
In JavaScript, the function that can implement an alert box is alert(), which is a method of the Window object. Its function is to pop up an alert box with a specified message and an "OK" button; the syntax is: "window.alert(message)", the prefix window can be omitted.
The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.
When you need to ensure that the user receives certain information, you can use the Alert box. The user must click the [OK] button on the warning box to continue the operation.
In javascript, the alert() function can be used to implement warning boxes.
alert() is a method of the Window object, which is used to display an alert box with a specified message and an "OK" button.
Specific syntax format:
window.alert(message)
The function parameters are the content displayed in the pop-up box; the prefix window can be omitted.
Example:
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>JavaScript的弹出框</title>
</head>
<body>
<input type="button" value="弹出警告框" onclick="popup()"/>
<script type="text/javascript">
function popup(){
alert("点击[确定]以继续操作");
}
</script>
</body>
</html>
[Related recommendations: javascript learning tutorial]
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