Differences Between opener and parent in js

This article mainly introduces the Differences Between opener and parent in js. If you need them, you can refer to them and hope to help you, for example, A page uses window. when the open dialog box appears, the window where page A is located is the opener of page B. You can access page A through the opener object on page B.

Parent indicates the parent window. For example, if A page A uses iframe or frame to call page B, the window where page A is located is the parent of page B. In JS, window. opener only references the parent window of the pop-up window. For example, in a.html, open a new window B .html by clicking the "click" and click "other" to generate a new window. Contents.

If this reference fails, null is returned. Therefore, before calling an opener object, you must first determine whether the object is null. Otherwise, a JS error "the object is empty or does not exist" will occur.

Example:
Aa.html

The Code is as follows:

Untitled document

Bb.html

The Code is as follows:

Untitled document

In a textbox with the id "name" on window. opener worker, you can

Written:
Optional values opener.doc ument. getElementById ("name"). value = "input data ";
Extends extends opener.doc ument. getElementById ("name"). innerHTML = "input data ";