Js method for detecting whether iframe is loaded successfully _ javascript skills

This article mainly introduces how to check whether iframe is loaded by js. It involves the skills related to JavaScript in determining the control value of the Framework page and page loading. It has some reference value, for more information about how to check whether iframe is loaded, see the example in this article. We will share this with you for your reference. The details are as follows:

Here is an extended application following the previous article "How to Implement iframe framework values in js (compatible with IE, firefox, chrome, etc:

Application Scenario: one of the most unique applications that iframe personally feels is to use the P3P protocol to write cookies across domains (as if no more effective method has been found ), however, sometimes we do not know whether the iframe page has been executed. Is there a way to determine whether the page load in the iframe is complete?

Iframe1.html:

  Internal framework page