The function must return an object with the same structure. When a function is used to determine the offset, it is called with an object containing the offset data as its first argument. Offset of the dropdown relative to its target. For data attributes, append the option name to data-, as in data-offset="". Options can be passed via data attributes or JavaScript. Regardless of whether you call your dropdown via JavaScript or instead use the data-api, data-toggle="dropdown" is always required to be present on the dropdown’s trigger element. The data-toggle="dropdown" attribute is relied on for closing dropdown menus at an application level, so it’s a good idea to always use it. Via data attributes or JavaScript, the dropdown plugin toggles hidden content (dropdown menus) by toggling the. Action Another action Something else here Reference Toggle Dropdown Action Another action Something else here Separated link Usage Trigger dropdown menus above elements by adding. Those extra changes keep the caret centered in the split button and provide a more appropriately sized hit area next to the main button. We use this extra class to reduce the horizontal padding on either side of the caret by 25% and remove the margin-left that’s added for regular button dropdowns. dropdown-toggle-split for proper spacing around the dropdown caret. Similarly, create split button dropdowns with virtually the same markup as single button dropdowns, but with the addition of. Action Another action Something else here Separated link Split button Here’s how you can put them to work with either elements: btn can be turned into a dropdown toggle with some markup changes. Dropdowns can be triggered from or elements to better fit your potential needs. dropdown, or another element that declares position: relative. Wrap the dropdown’s toggle (your button or link) and the dropdown menu within. dropdown-item elements using the cursor keys and close the menu with the ESC key. However, Bootstrap does add built-in support for most standard keyboard menu interactions, such as the ability to move through individual. Authors will have to include these more specific attributes themselves. For this reason, Bootstrap does not expect (nor automatically add) any of the role and aria- attributes required for true ARIA menus. For instance, it is possible to create dropdowns that contain additional inputs and form controls, such as search fields or login forms. ARIA menus can only contain menu items, checkbox menu items, radio button menu items, radio button groups, and sub-menus.īootstrap’s dropdowns, on the other hand, are designed to be generic and applicable to a variety of situations and markup structures. The WAI ARIA standard defines an actual role="menu" widget, but this is specific to application-like menus which trigger actions or functions. If you’re building our JavaScript from source, it requires util.js. Popper.js isn’t used to position dropdowns in navbars though as dynamic positioning isn’t required. Be sure to include before Bootstrap’s JavaScript or use / which contains Popper.js. They’re toggled by clicking, not by hovering this is an intentional design decision.ĭropdowns are built on a third party library, Popper.js, which provides dynamic positioning and viewport detection. They’re made interactive with the included Bootstrap dropdown JavaScript plugin. Overviewĭropdowns are toggleable, contextual overlays for displaying lists of links and more. Toggle contextual overlays for displaying lists of links and more with the Bootstrap dropdown plugin.
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