What are the disadvantages of iframes?

1. iframe will block the onload event of the main page;

2. The search engine retrieval program cannot interpret this kind of page, which is not conducive to SEO;

3. It will affect the parallel loading of the page .

Parallel loading: There is a limit to the number of loads under the same domain name at the same time:

Solution:

Use js to dynamically load page content into the src of the iframe. The sample code is as follows:

[html]

1. <iframe id="fram">iframe>

2. ## document.getelementbyid("fram")

   .src= "a2.html"

##

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