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Widget:Expand or Collapse All

<button onclick='Array.from(document.getElementsByClassName("mw-collapsible-toggle-collapsed")).forEach(function(section){section.childNodes[1].click()});'>Expand all</button> <button onclick='Array.from(document.getElementsByClassName("mw-collapsible-toggle-expanded")).forEach(function(section){section.childNodes[1].click()});'>Collapse all</button>