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When we browse the web, we may encounter that a certain web page cannot be accessed or is unsafe to access. At this time, a warning dialog box will pop up. So, what can we do with this pop-up dialog box? What about implementation? This article will introduce to you how to use How to use How to use JavaScript to implement pop-up warnings to implement pop-up warnings to implement this pop-up warning. Let’s look at the specific content below.
It is very simple to implement this kind of pop-up warning using How to use How to use JavaScript to implement pop-up warnings to implement pop-up warnings. Let’s take a look at the specific example
To use How to use How to use JavaScript to implement pop-up warnings to implement pop-up warnings to display the alert , just write the following code
alert('要显示的字符串,值');
The complete code is as follows
<!DOCTYPE html> <html lang = "ja"> <head> <meta charset = "utf-8"> <title>How to use How to use JavaScript to implement pop-up warnings to implement pop-up warnings</title> </head> <body> <script> alert('警告!!!'); </script> </body> </html>
The running effect is as follows: When using the browser to load the file, nothing will be displayed on the browser, but the following will be displayed on the page pop up
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