Let's talk about vs2017 javascript jump problem

In recent years, JavaScript has become one of the essential technologies in Web development and is widely used in front-end page interaction, dynamic effect display, and back-end server interaction. Although JavaScript has been widely used, there is still a common problem for VS2017 developers, which is the JavaScript jump problem that occurs during the development process.

Here, we will share how to solve JavaScript jump problems when using VS2017 to help developers better deal with problems that arise during the development process.

1. Symptoms of the problem

During the development process using VS2017, you are likely to encounter JavaScript jump problems. The specific performance is as follows: when writing code in JavaScript, trying to jump the address through window.location.href or location.href, etc., but it cannot jump without any error prompt.

2. Cause of the problem

The main reason for the JavaScript jump problem is that when we use location.href or window.location.href in JavaScript to jump the address, it does not It does not jump to the specified address, but stores the address in the browser cache.

Since the browser caching mechanism in VS2017 caches JavaScript code and HTML files separately, it will cause us to be unable to jump in real time when writing JavaScript code. The JavaScript jump problem may be solved after Cache-Control passes no-cache or max-age=0, or after clearing the browser cache.

3. Solution

1. Use Meta tag

We can use Meta tag to avoid JavaScript jump problems. In the head of the HTML, add the following Meta tag information:

<meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" />
<meta http-equiv="Pragma" content="no-cache" />
<meta http-equiv="Expires" content="0" />

In this way, whether you use location.href or window.location.href to jump in JavaScript, you can jump immediately. transfer operation.

2. Add a timestamp after the address

Another way to solve the JavaScript jump problem is to add a timestamp after the address. We can add the current timestamp at the end of the address to avoid the impact of browser caching. The JavaScript code is as follows:

window.location.href = "http://www.xxxxx.com/index.html?t=" + new Date().getTime();

In this way, when jumping to the specified address, the timestamp will be added to the end of the address, and the browser will not be able to obtain the data of the corresponding address from the cache and directly request the server , thereby achieving a real jump.

3. Use No-Cache Header

The last solution is to use No-Cache Header. This method uses the HTTP response header to notify the browser caching mechanism not to save the response to the request. The specific HTTP Headers information is as follows:

Cache-Control: no-cache, no-store, must-revalidate
Pragma: no-cache
Expires: 0

The above is the general method of using No-Cache Header to solve the JavaScript jump problem.

Conclusion

Through the above three solutions, we can easily solve the JavaScript jump problem in VS2017. During the development process, we should remain vigilant about this and continuously improve development efficiency and code quality. Only by constantly learning new knowledge and exploring new technologies can we complete our work better.

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