Html Functions for creating html
create_html	Create a basic html file
write_html_to_file	Convert html to string
Html - Header Functions for adding header stuff to a html
add_header_title	Add title to html header
add_js_library	Add js libraries src files to html header
add_script	Add Javascript to body
add_script_from_file	Add Javascript from file to body
add_script_from_link	Add Javascript from link
add_style	Add css style to html header
add_style_from_file	Add css style to html header
add_style_from_link	Add css style to html header
Html - Containers Functions for adding containers to a html
add_div	Add a section (div element) to body
add_row	Add a section (div element) to body
add_column	Add a section (div element) to body
add_container	Add a container (div element) to body
add_item	Add a item (div element) to body
Html - Widgets Functions for adding widgets to a html
add_button	Add slider to body
add_counter	Add a counter with text
add_google_play_pause	Add a google-style play-pause button
add_google_style_button	Add a google-style single image button
add_slider	Add slider to body
add_slider_with_text	Add a slider with text description (to body)
add_text	Add text
add_title	Add title to body
Html - General html5 elements Functions for adding generic html5 elements to a html
add_tag_into	Generic function to add a pair of enclosing "tags" to "script", then insert into "into" of "my_html"
html5_elements	Create builders for html5 elements
App Functions to create and run apps
create_app	Create an interactive app
start_app	Run an interactive app
preview_app	Preview app
Helper functions to aid developing Functions to aid developing
developing_html	Helper function to aid developing and testing html file
developing_r	Helper function to aid developing and testing R codes
developing	Helper function to aid developing and testing codes