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import tippy from 'tippy.js';
export function createTippy(target, opts = {}) {
const instance = tippy(target, {
appendTo: document.body,
animation: false,
allowHTML: false,
hideOnClick: false,
interactiveBorder: 20,
ignoreAttributes: true,
maxWidth: 500, // increase over default 350px
arrow: `<svg width="16" height="7"><path d="m0 7 8-7 8 7Z" class="tippy-svg-arrow-outer"/><path d="m0 8 8-7 8 7Z" class="tippy-svg-arrow-inner"/></svg>`,
...(opts?.role && {theme: opts.role}),
...opts,
});
// for popups where content refers to a DOM element, we use the 'tippy-target' class
// to initially hide the content, now we can remove it as the content has been removed
// from the DOM by tippy
if (opts.content instanceof Element) {
opts.content.classList.remove('tippy-target');
}
return instance;
}
/**
* Attach a tooltip tippy to the given target element.
* If the target element already has a tooltip tippy attached, the tooltip will be updated with the new content.
* If the target element has no content, then no tooltip will be attached, and it returns null.
*
* Note: "tooltip" doesn't equal to "tippy". "tooltip" means a auto-popup content, it just uses tippy as the implementation.
*
* @param target {HTMLElement}
* @param content {null|string}
* @returns {null|tippy}
*/
function attachTooltip(target, content = null) {
switchTitleToTooltip(target);
content = content ?? target.getAttribute('data-tooltip-content');
if (!content) return null;
const props = {
content,
delay: 100,
role: 'tooltip',
placement: target.getAttribute('data-tooltip-placement') || 'top-start',
...(target.getAttribute('data-tooltip-interactive') === 'true' ? {interactive: true, aria: {content: 'describedby', expanded: false}} : {}),
};
if (!target._tippy) {
createTippy(target, props);
} else {
target._tippy.setProps(props);
}
return target._tippy;
}
function switchTitleToTooltip(target) {
const title = target.getAttribute('title');
if (title) {
target.setAttribute('data-tooltip-content', title);
target.setAttribute('aria-label', title);
// keep the attribute, in case there are some other "[title]" selectors
// and to prevent infinite loop with <relative-time> which will re-add
// title if it is absent
target.setAttribute('title', '');
}
}
/**
* Creating tooltip tippy instance is expensive, so we only create it when the user hovers over the element
* According to https://www.w3.org/TR/DOM-Level-3-Events/#events-mouseevent-event-order , mouseover event is fired before mouseenter event
* Some old browsers like Pale Moon doesn't support "mouseenter(capture)"
* The tippy by default uses "mouseenter" event to show, so we use "mouseover" event to switch to tippy
* @param e {Event}
*/
function lazyTooltipOnMouseHover(e) {
e.target.removeEventListener('mouseover', lazyTooltipOnMouseHover, true);
attachTooltip(this);
}
// Activate the tooltip for current element.
// If the element has no aria-label, use the tooltip content as aria-label.
function attachLazyTooltip(el) {
el.addEventListener('mouseover', lazyTooltipOnMouseHover, {capture: true});
// meanwhile, if the element has no aria-label, use the tooltip content as aria-label
if (!el.hasAttribute('aria-label')) {
const content = el.getAttribute('data-tooltip-content');
if (content) {
el.setAttribute('aria-label', content);
}
}
}
// Activate the tooltip for all children elements.
function attachChildrenLazyTooltip(target) {
for (const el of target.querySelectorAll('[data-tooltip-content]')) {
attachLazyTooltip(el);
}
}
const elementNodeTypes = new Set([Node.ELEMENT_NODE, Node.DOCUMENT_FRAGMENT_NODE]);
export function initGlobalTooltips() {
// use MutationObserver to detect new "data-tooltip-content" elements added to the DOM, or attributes changed
const observerConnect = (observer) => observer.observe(document, {
subtree: true,
childList: true,
attributeFilter: ['data-tooltip-content', 'title']
});
const observer = new MutationObserver((mutationList, observer) => {
const pending = observer.takeRecords();
observer.disconnect();
for (const mutation of [...mutationList, ...pending]) {
if (mutation.type === 'childList') {
// mainly for Vue components and AJAX rendered elements
for (const el of mutation.addedNodes) {
if (elementNodeTypes.has(el.nodeType)) {
attachChildrenLazyTooltip(el);
if (el.hasAttribute('data-tooltip-content')) {
attachLazyTooltip(el);
}
}
}
} else if (mutation.type === 'attributes') {
attachTooltip(mutation.target);
}
}
observerConnect(observer);
});
observerConnect(observer);
attachChildrenLazyTooltip(document.documentElement);
}
export function showTemporaryTooltip(target, content) {
const tippy = target._tippy ?? attachTooltip(target, content);
tippy.setContent(content);
if (!tippy.state.isShown) tippy.show();
tippy.setProps({
onHidden: (tippy) => {
// reset the default tooltip content, if no default, then this temporary tooltip could be destroyed
if (!attachTooltip(target)) {
tippy.destroy();
}
},
});
}
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