iframe does not refresh in javascript

With the widespread application of JavaScript, we often use iframes (inline frames) in web pages to load other web pages. In some cases, we may need to load a new web page in an iframe, but find that the page does not refresh. In this article, we will explore the causes of this problem and provide some solutions.

1. The working principle of iframe

Before formally discussing the problem, we need to first understand the working principle of iframe. An iframe actually embeds a web page into another web page, that is, it is a subpage of a web page. An iframe is usually defined in the following way:

<iframe src="url"></iframe>

where the src attribute specifies the URL of the web page to be embedded. When the page loads, the browser loads the specified URL and places it into an iframe. We can control the size and position of the iframe through JavaScript code, and can also perform other operations in the iframe.

2. The reason why the iframe does not refresh

Now let us return to the topic of this article: Why does the page not refresh after loading a new web page in the iframe? The reason is that when we load a new web page in the iframe, we actually just replace the URL in the iframe and do not refresh the web page. This means that if we make some changes in the new web page, these changes will not show up in the iframe unless we refresh the iframe manually.

3. Solutions

Now that we have understood the reasons why the iframe does not refresh, we will introduce some solutions below:

1. Use JavaScript to refresh the iframe

We can use JavaScript code to refresh the iframe. The code is as follows:

document.getElementById("myFrame").contentWindow.location.reload();

MyFrame here is the ID of the iframe. This code reloads the URL in the iframe and forces a refresh of the page.

2. Use meta tag to refresh iframe

Another method is to use meta tag to automatically refresh iframe. We can add the following tags to the web page to be refreshed:

<meta http-equiv="refresh" content="1">

Among them, the content attribute specifies the refresh time of the web page, in seconds. In this example, the web page will automatically refresh every 1 second. This method makes it easy to automatically refresh web pages in iframes.

3. Use the SRC attribute of iframe

We can also refresh the page by directly modifying the SRC attribute of iframe. The code is as follows:

document.getElementById("myFrame").src = document.getElementById("myFrame").src;

This code will reassign the SRC attribute of the current iframe to itself, thereby refreshing the entire iframe.

4. Summary

In this article, we deeply explore the reasons why iframe does not refresh in JavaScript and provide three solutions. No matter which approach we take, we can easily load a new web page in an iframe and have the changes updated immediately. I hope this article can help you solve this problem, and I also hope you can make better use of JavaScript and iframes in your future work.

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