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ript reference sql keyword reference python reference java reference c reference c reference colors color names php reference html dom reference mysql reference w3 css reference bootstrap 3 reference bootstrap 4 reference node js reference django reference jquery reference vue attributes angular reference sass reference xml reference json reference asp reference icons reference svg reference canvas reference charsets reference emojis reference appml reference w3 js reference exercises practice and test your skills with different exercises tip sign in to track your progress select another topic html exercises css exercises javascript exercises sql exercises python exercises java exercises c exercises c exercises c exercises php exercises react exercises mysql exercises excel exercises dsa exercises bootstrap 3 exercises bootstrap 4 exercises bootstrap 5 exercises node js exercises typescript exercises django exercises postgresql exercises jquery exercises numpy exercises pandas 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u00a0 u00a0 lorem ipsum dolor sit amet u00a0 u00a0 u00a0 u00a0 u00a0 u00a0 u00a0 u00a0 u00a0 u00a0 u00a0 u00a0 u00a0 u00a0 column 3 u00a0 u00a0 u00a0 u00a0 u00a0 u00a0 u00a0 u00a0 lorem ipsum dolor sit amet u00a0 u00a0 u00a0 u00a0 u00a0 u00a0 tryurl bootstrap5 tryit asp filename trybs_default stacked h learnurl bootstrap5 index php referenceurl null certificateurl https campus w3schools com collections certifications products bootstrap 5 certificate mysql name mysql syntax sql code select from customers tryurl mysql trymysql asp filename trysql_select_all learnurl mysql default asp referenceurl mysql mysql_ref_functions asp certificateurl https campus w3schools com collections certifications products mysql certificate jquery name jquery syntax javascript code document ready function u00a0 u00a0 p click function u00a0 u00a0 u00a0 u00a0 this hide u00a0 u00a0 tryurl jquery tryit asp filename tryjquery_hide learnurl jquery default asp referenceurl jquery jquery_ref_overview asp 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root queryselector home extra learn var reference root queryselector home extra reference var certificate root queryselector home extra certificate var panel root queryselector home panel extra if title code tryit learn reference certificate panel return false title textcontent config name example code innerhtml highlightextratopiccode config code setattribute aria label config name code example tryit href config tryurl tryit title try config name online learn href config learnurl learn textcontent learn config name learn title config name tutorial reference hidden config referenceurl if config referenceurl reference href config referenceurl reference textcontent config name reference reference title config name reference else reference removeattribute href certificate hidden config certificateurl null if certificate hidden certificate href config certificateurl https campus w3schools com collections certifications certificate textcontent config name certificate certificate title config name certificate else certificate removeattribute href panel setattribute aria labelledby home tab topickey return true var tabbuttons root queryselectorall tabbtn var panels root queryselectorall demo panel function activatetab button tabbuttons foreach function item var active item button item classlist toggle on active item setattribute aria selected active true false item setattribute tabindex active 0 1 var topickey button getattribute data t var usesextrapanel renderextratopic topickey panels foreach function panel var activepanel usesextrapanel panel id home panel extra panel getattribute data p topickey panel classlist toggle on activepanel var tabtrack button closest data carousel track if tabtrack var targetleft button offsetleft tabtrack clientwidth button offsetwidth 2 if typeof tabtrack scrollto function tabtrack scrollto left math max 0 targetleft behavior smooth else tabtrack scrollleft math max 0 targetleft tabbuttons foreach function button index button setattribute tabindex button classlist contains on 0 1 button addeventlistener click function activatetab button button addeventlistener keydown function event if event key arrowleft event key arrowright return event preventdefault var direction event key arrowright 1 1 var nextindex index direction tabbuttons length tabbuttons length var nextbutton tabbuttons nextindex activatetab nextbutton nextbutton focus var spacetabbuttons root queryselectorall data space file var spacecodepanes root queryselectorall data space code function activatespacefile button var filename button getattribute data space file spacetabbuttons foreach function item var active item button item classlist toggle on active item setattribute aria selected active true false item setattribute tabindex active 0 1 spacecodepanes foreach function pane pane hidden pane getattribute data space code filename spacetabbuttons foreach function button index button addeventlistener click function activatespacefile button button 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