Document. Introduction to functions and usage of designMode _ javascript skills

Document. Function and usage of designMode
To set the entire document to the design mode, you can set the designMode attribute for the document object itself. When the document is in design mode, no script is run. In this way, it seems that setting a button in the document to open or close the design mode is a good note, but this does not work. When the user opens it, it will remain in the design mode. When they click this button next time, it will be selected rather than clicked, and they will be able to edit its value by clicking it again. This is why it is best to set the designMode attribute for the document in the framework or IFrame if you want to use the design mode. The following example shows how to enable the design mode for the document in IFrame:

The Code is as follows: