This is a step by step guide for adding HTML and Javascript to the page.
Add HTML
If you want to add the HTML code to the page (for example, a table), you can follow these steps:
1. Open the page which you want in edit mode from the WordPress dashboard.
2. Choose Backend Editor from the top of the page.
3. Choose Raw HTML from the elements.
4. Add HTML codes into the Raw HTML
Add Javascript
If you want to add Javascript code to the page (for example popup window), you can follow these steps:
1. Open the page which you want in edit mode from the WordPress dashboard.
2. Choose Backend Editor from the top of the page.
3. Choose Raw JS from the elements.
4. Add Javascript codes into the Raw JS.