DOM node replacement or modification function replaceChild () usage instance _ javascript tips-js tutorial

This article describes how to replace or modify the function replaceChild () on a DOM node. The example shows how to replace a DOM node with replaceChild, for more information about how to replace or modify the replaceChild () function of a DOM node, see the examples in this article. Share it with you for your reference. The specific analysis is as follows:

DOM node replacement process:
(1) create a new node;
(2) Find the old node;
(3) from the perspective of the parent node, replaceChild (new, old) function is used for replacement.

The Code is as follows: