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* @module Utils
*
* @categoryDescription DOM: Querying
* These functions query the style, attributes or other aspects of elements, but
* could lead to forced layout if not scheduled using {@link waitForMeasureTime}.
*
* @categoryDescription DOM: Querying (optimized)
* These functions query the style, attributes or other aspects of elements in
* an optimized way. Functions that could cause a forced layout use
* {@link waitForMeasureTime} and so are asynchronous. Functions that can
* perform the check without forcing a re-layout are synchronous.
*
* @categoryDescription Style: Altering
* These functions transition an element from one CSS class to another, but
* could lead to forced layout if not scheduled using {@link waitForMutateTime}.
* If a delay is supplied, then the transition is "scheduled" and if the
* opposite transition is executed before the scheduled one, the original one
* is cancelled. See {@link transitionElement} for an example.
*
* @categoryDescription Style: Altering (optimized)
* These functions transition an element from one CSS class to another in an
* optimized way using {@link waitForMutateTime} and so are asynchronous.
* If a delay is supplied, then the transition is "scheduled" and if the
* opposite transition is executed before the scheduled one, the original one
* is cancelled. See {@link transitionElement} for an example.
*/
import * as MC from "@lisn/globals/minification-constants";
import * as MH from "@lisn/globals/minification-helpers";
import { DOMElement, FlexDirection } from "@lisn/globals/types";
import {
waitForMeasureTime,
waitForMutateTime,
asyncMeasurerFor,
asyncMutatorFor,
waitForSubsequentMutateTime,
} from "@lisn/utils/dom-optimize";
import { isDOMElement } from "@lisn/utils/dom-query";
import { isValidNum, roundNumTo } from "@lisn/utils/math";
import { waitForDelay } from "@lisn/utils/tasks";
import { camelToKebabCase, splitOn } from "@lisn/utils/text";
/**
* Removes the given `fromCls` class and adds the given `toCls` class to the
* element.
*
* Unlike {@link https://developer.mozilla.org/en-US/docs/Web/API/DOMTokenList/replace | DOMTokenList:replace},
* this will always add `toCls` even if `fromCls` isn't in the element's class list.
*
* @returns True if there was a change made (class removed or added), false
* otherwise.
*
* @category Style: Altering
*/
export const transitionElementNow = (
element: Element,
fromCls: string,
toCls: string,
) => {
cancelCSSTransitions(element, fromCls, toCls);
// Avoid triggering MutationObserver unnecessarily.
let didChange = false;
if (hasClass(element, fromCls)) {
didChange = true;
removeClassesNow(element, fromCls);
}
if (!hasClass(element, toCls)) {
addClassesNow(element, toCls);
didChange = true;
}
return didChange;
};
/**
* Like {@link transitionElementNow} except it will {@link waitForMutateTime},
* and optionally a delay, and it finally awaits for the effective style's
* transition-duration.
*
* If a delay is supplied, then the transition is "scheduled" and if the
* opposite transition is executed before the scheduled one, this one is
* cancelled.
*
* @example
*
* - {@link showElement} with delay of 100 schedules `lisn-hide` -> `lisn-show`
* in 100ms
* - then if {@link hideElementNow} is called, or a scheduled
* {@link hideElement} completes before that timer runs out, this call to
* {@link showElement} aborts
*
* ```javascript
* hideElement(someElement, 10);
* // this will be aborted in 10ms when the scheduled hideElement above
* // completes
* showElement(someElement, 100);
* ```
*
* ```javascript
* // this will be aborted in 10ms when the hideElement that will be scheduled
* // below completes
* showElement(someElement, 100);
* hideElement(someElement, 10);
* ```
*
* ```javascript
* // this will be aborted immediately by hideElementNow that runs straight
* // afterwards
* showElement(someElement, 100);
* hideElementNow(someElement);
* ```
*
* ```javascript
* hideElementNow(someElement);
* // this will NOT be aborted because hideElementNow has completed already
* showElement(someElement, 100);
* ```
*
* @category Style: Altering (optimized)
*/
export const transitionElement = async (
element: Element,
fromCls: string,
toCls: string,
delay = 0,
) => {
const thisTransition = scheduleCSSTransition(element, toCls);
if (delay) {
await waitForDelay(delay);
}
await waitForMutateTime();
if (thisTransition._isCancelled()) {
// it has been overridden by a later transition
return false;
}
const didChange = transitionElementNow(element, fromCls, toCls);
thisTransition._finish();
if (!didChange) {
return false;
}
// Await for the transition duration so that caller awaiting on us knows when
// it's complete.
const transitionDuration = await getMaxTransitionDuration(element);
if (transitionDuration) {
await waitForDelay(transitionDuration);
}
return true;
};
/**
* Transitions an element from class `lisn-undisplay` (which applies `display:
* none`) to `lisn-display` (no style associated with this).
*
* The difference between this and simply removing the `lisn-undisplay` class
* is that previously scheduled transitions to `lisn-undisplay` will be
* cancelled.
*
* @see {@link transitionElementNow}
*
* @category Style: Altering
*/
export const displayElementNow = (element: Element) =>
transitionElementNow(element, MC.PREFIX_UNDISPLAY, MC.PREFIX_DISPLAY);
/**
* Like {@link displayElementNow} except it will {@link waitForMutateTime}, and
* optionally a delay.
*
* @see {@link transitionElement}
*
* @category Style: Altering (optimized)
*/
export const displayElement = (element: Element, delay = 0) =>
transitionElement(element, MC.PREFIX_UNDISPLAY, MC.PREFIX_DISPLAY, delay);
/**
* The opposite of {@link displayElementNow}.
*
* @see {@link transitionElementNow}
*
* @category Style: Altering
*/
export const undisplayElementNow = (element: Element) =>
transitionElementNow(element, MC.PREFIX_DISPLAY, MC.PREFIX_UNDISPLAY);
/**
* Like {@link undisplayElementNow} except it will {@link waitForMutateTime},
* and optionally a delay.
*
* @see {@link transitionElement}
*
* @category Style: Altering (optimized)
*/
export const undisplayElement = (element: Element, delay = 0) =>
transitionElement(element, MC.PREFIX_DISPLAY, MC.PREFIX_UNDISPLAY, delay);
/**
* Transitions an element from class `lisn-hide` (which makes the element
* hidden) to `lisn-show` (which shows it). These classes have CSS
* transitions applied so the element is faded into and out of view.
*
* @see {@link transitionElementNow}.
*
* @category Style: Altering
*/
export const showElementNow = (element: Element) =>
transitionElementNow(element, MC.PREFIX_HIDE, MC.PREFIX_SHOW);
/**
* Like {@link showElementNow} except it will {@link waitForMutateTime}, and
* optionally a delay.
*
* @see {@link transitionElement}
*
* @category Style: Altering (optimized)
*/
export const showElement = (element: Element, delay = 0) =>
transitionElement(element, MC.PREFIX_HIDE, MC.PREFIX_SHOW, delay);
/**
* The opposite of {@link showElementNow}.
*
* @see {@link transitionElementNow}
*
* @category Style: Altering
*/
export const hideElementNow = (element: Element) =>
transitionElementNow(element, MC.PREFIX_SHOW, MC.PREFIX_HIDE);
/**
* Like {@link hideElementNow} except it will {@link waitForMutateTime}, and
* optionally a delay.
*
* @see {@link transitionElement}
*
* @category Style: Altering (optimized)
*/
export const hideElement = (element: Element, delay = 0) =>
transitionElement(element, MC.PREFIX_SHOW, MC.PREFIX_HIDE, delay);
/**
* If {@link isElementUndisplayed}, it will {@link displayElementNow},
* otherwise it will {@link undisplayElementNow}.
*
* @see {@link transitionElementNow}
*
* @category Style: Altering
*/
export const toggleDisplayElementNow = (element: Element) =>
isElementUndisplayed(element)
? displayElementNow(element)
: undisplayElementNow(element);
/**
* Like {@link toggleDisplayElementNow} except it will {@link waitForMutateTime},
* and optionally a delay.
*
* @see {@link transitionElement}
*
* @category Style: Altering (optimized)
*/
export const toggleDisplayElement = (element: Element, delay = 0) =>
isElementUndisplayed(element)
? displayElement(element, delay)
: undisplayElement(element, delay);
/**
* If {@link isElementHidden}, it will {@link showElementNow}, otherwise
* {@link hideElementNow}.
*
* @see {@link transitionElementNow}
*
* @category Style: Altering
*/
export const toggleShowElementNow = (element: Element) =>
isElementHidden(element) ? showElementNow(element) : hideElementNow(element);
/**
* Like {@link toggleShowElementNow} except it will {@link waitForMutateTime}, and
* optionally a delay.
*
* @see {@link transitionElement}
*
* @category Style: Altering (optimized)
*/
export const toggleShowElement = (element: Element, delay = 0) =>
isElementHidden(element)
? showElement(element, delay)
: hideElement(element, delay);
/**
* Returns true if the element's class list contains `lisn-hide`.
*
* @category DOM: Querying (optimized)
*/
export const isElementHidden = (element: Element) =>
hasClass(element, MC.PREFIX_HIDE);
/**
* Returns true if the element's class list contains `lisn-undisplay`.
*
* @category DOM: Querying (optimized)
*/
export const isElementUndisplayed = (element: Element) =>
hasClass(element, MC.PREFIX_UNDISPLAY);
/**
* Returns true if the element's class list contains the given class.
*
* @category DOM: Querying (optimized)
*/
export const hasClass = (element: Element, className: string) =>
MH.classList(element).contains(className);
/**
* Returns true if the element's class list contains all of the given classes.
*
* @since v1.2.0
*
* @category DOM: Querying (optimized)
*/
export const hasAllClasses = (element: Element, ...classNames: string[]) =>
MH.lengthOf(classNames) > 0 &&
!MH.some(classNames, (className) => !hasClass(element, className));
/**
* Returns true if the element's class list contains any of the given classes.
*
* @since v1.2.0
*
* @category DOM: Querying (optimized)
*/
export const hasAnyClass = (element: Element, ...classNames: string[]) =>
MH.some(classNames, (className) => hasClass(element, className));
/**
* Adds the given classes to the element.
*
* @category Style: Altering
*/
export const addClassesNow = (element: Element, ...classNames: string[]) =>
MH.classList(element).add(...classNames);
/**
* Like {@link addClassesNow} except it will {@link waitForMutateTime}.
*
* @category Style: Altering (optimized)
*/
export const addClasses = asyncMutatorFor(addClassesNow);
/**
* Removes the given classes to the element.
*
* @category Style: Altering
*/
export const removeClassesNow = (element: Element, ...classNames: string[]) =>
MH.remove(MH.classList(element), ...classNames);
/**
* Like {@link removeClassesNow} except it will {@link waitForMutateTime}.
*
* @category Style: Altering (optimized)
*/
export const removeClasses = asyncMutatorFor(removeClassesNow);
/**
* Toggles the given class on the element.
*
* @param force See {@link https://developer.mozilla.org/en-US/docs/Web/API/DOMTokenList/toggle | DOMTokenList:toggle}
*
* @category Style: Altering
*/
export const toggleClassNow = (
element: Element,
className: string,
force?: boolean,
) => MH.classList(element).toggle(className, force);
/**
* Like {@link toggleClassNow} except it will {@link waitForMutateTime}.
*
* @category Style: Altering (optimized)
*/
export const toggleClass = asyncMutatorFor(toggleClassNow);
/**
* Toggles the given classes on the element. This function does not accept the
* `force` parameter.
*
* @since v1.2.0
*
* @category Style: Altering
*/
export const toggleClassesNow = (element: Element, ...classNames: string[]) => {
for (const cls of classNames) {
toggleClassNow(element, cls);
}
};
/**
* Like {@link toggleClassesNow} except it will {@link waitForMutateTime}.
*
* @since v1.2.0
*
* @category Style: Altering (optimized)
*/
export const toggleClasses = asyncMutatorFor(toggleClassesNow);
/**
* Replaces the given class on the element with a new one.
*
* @since v1.2.0
*
* @category Style: Altering
*/
export const replaceClassNow = (
element: Element,
oldClassName: string,
newClassName: string,
) => MH.classList(element).replace(oldClassName, newClassName);
/**
* Like {@link replaceClassNow} except it will {@link waitForMutateTime}.
*
* @since v1.2.0
*
* @category Style: Altering (optimized)
*/
export const replaceClass = asyncMutatorFor(replaceClassNow);
// For *Data: to avoid unnecessary type checking that ensures element is
// HTMLElement or SVGElement, use getAttribute instead of dataset.
/**
* Returns the value of the given data attribute. The name of the attribute
* must _not_ start with `data`. It can be in either camelCase or kebab-case,
* it is converted as needed.
*
* @category DOM: Querying (optimized)
*/
export const getData = (element: Element, name: string) =>
MH.getAttr(element, MH.prefixData(name));
/**
* Returns the value of the given data attribute as a boolean. Its value is
* expected to be either blank or "true" (which result in `true`), or "false"
* (which results in `false`).
*
* The name of the attribute must _not_ start with `data`. It can be in either
* camelCase or kebab-case, it is converted as needed.
*
* @since v1.2.0
*
* @category DOM: Querying (optimized)
*/
export const getBooleanData = (element: Element, name: string) => {
const value = getData(element, name);
return value !== null && value !== "false";
};
/**
* @ignore
* @deprecated
*
* Deprecated alias for {@link getBooleanData}
*/
export const getBoolData = getBooleanData;
/**
* Sets the given data attribute.
*
* The name of the attribute must _not_ start with `data`. It can be in either
* camelCase or kebab-case, it is converted as needed.
*
* @category Style: Altering
*/
export const setDataNow = (element: Element, name: string, value: string) =>
MH.setAttr(element, MH.prefixData(name), value);
/**
* Like {@link setDataNow} except it will {@link waitForMutateTime}.
*
* @category Style: Altering (optimized)
*/
export const setData = asyncMutatorFor(setDataNow);
/**
* Sets the given data attribute with value "true" (default) or "false".
*
* The name of the attribute must _not_ start with `data`. It can be in either
* camelCase or kebab-case, it is converted as needed.
*
* @since v1.2.0
*
* @category Style: Altering
*/
export const setBooleanDataNow = (
element: Element,
name: string,
value = true,
) => MH.setAttr(element, MH.prefixData(name), value + "");
/**
* @ignore
* @deprecated
*
* Deprecated alias for {@link setBooleanData}
*/
export const setBoolDataNow = setBooleanDataNow;
/**
* Like {@link setBooleanDataNow} except it will {@link waitForMutateTime}.
*
* @since v1.2.0
*
* @category Style: Altering (optimized)
*/
export const setBooleanData = asyncMutatorFor(setBooleanDataNow);
/**
* @ignore
* @deprecated
*
* Deprecated alias for {@link setBoolean}
*/
export const setBoolData = setBooleanData;
/**
* Sets the given data attribute with value "false".
*
* The name of the attribute must _not_ start with `data`. It can be in either
* camelCase or kebab-case, it is converted as needed.
*
* @since v1.2.0
*
* @category Style: Altering
*/
export const unsetBooleanDataNow = (element: Element, name: string) =>
MH.unsetAttr(element, MH.prefixData(name));
/**
* @ignore
* @deprecated
*
* Deprecated alias for {@link unsetBooleanNow}
*/
export const unsetBoolDataNow = unsetBooleanDataNow;
/**
* Like {@link unsetBooleanDataNow} except it will {@link waitForMutateTime}.
*
* @since v1.2.0
*
* @category Style: Altering (optimized)
*/
export const unsetBooleanData = asyncMutatorFor(unsetBooleanDataNow);
/**
* @ignore
* @deprecated
*
* Deprecated alias for {@link unsetBoolean}
*/
export const unsetBoolData = unsetBooleanData;
/**
* Deletes the given data attribute.
*
* The name of the attribute must _not_ start with `data`. It can be in either
* camelCase or kebab-case, it is converted as needed.
*
* @category Style: Altering
*/
export const delDataNow = (element: Element, name: string) =>
MH.delAttr(element, MH.prefixData(name));
/**
* Like {@link delDataNow} except it will {@link waitForMutateTime}.
*
* @category Style: Altering (optimized)
*/
export const delData = asyncMutatorFor(delDataNow);
/**
* Returns the value of the given property from the computed style of the
* element.
*
* @category DOM: Querying
*/
export const getComputedStylePropNow = (element: Element, prop: string) =>
getComputedStyle(element).getPropertyValue(prop);
/**
* Like {@link getComputedStylePropNow} except it will {@link waitForMeasureTime}.
*
* @category DOM: Querying (optimized)
*/
export const getComputedStyleProp = asyncMeasurerFor(getComputedStylePropNow);
/**
* Returns the value of the given property from the inline style of the
* element.
*
* @category DOM: Querying
*/
export const getStylePropNow = (element: Element, prop: string) =>
(element as DOMElement).style?.getPropertyValue(prop);
/**
* Like {@link getStylePropNow} except it will {@link waitForMeasureTime}.
*
* @category DOM: Querying (optimized)
*/
export const getStyleProp = asyncMeasurerFor(getStylePropNow);
/**
* Sets the given property on the inline style of the element.
*
* @category DOM: Altering
*/
export const setStylePropNow = (
element: Element,
prop: string,
value: string,
) => (element as DOMElement).style?.setProperty(prop, value);
/**
* Like {@link setStylePropNow} except it will {@link waitForMutateTime}.
*
* @category DOM: Altering (optimized)
*/
export const setStyleProp = asyncMutatorFor(setStylePropNow);
/**
* Deletes the given property on the inline style of the element.
*
* @category DOM: Altering
*/
export const delStylePropNow = (element: Element, prop: string) =>
(element as DOMElement).style?.removeProperty(prop);
/**
* Like {@link delStylePropNow} except it will {@link waitForMutateTime}.
*
* @category DOM: Altering (optimized)
*/
export const delStyleProp = asyncMutatorFor(delStylePropNow);
/**
* Returns the flex direction of the given element **if it has a flex layout**.
*
* @returns `null` if the element does not have a flex layout.
*
* @category DOM: Querying (optimized)
*
* @since v1.2.0
*/
export const getFlexDirection = async (
element: Element,
): Promise<FlexDirection | null> => {
const displayStyle = await getComputedStyleProp(element, "display");
if (!displayStyle.includes("flex")) {
return null;
}
return (await getComputedStyleProp(
element,
"flex-direction",
)) as FlexDirection;
};
/**
* Returns the flex direction of the given element's parent **if it has a flex
* layout**.
*
* @returns `null` if the element's parent does not have a flex layout.
*
* @category DOM: Querying (optimized)
*
* @since v1.2.0
*/
export const getParentFlexDirection = async (
element: Element,
): Promise<FlexDirection | null> => {
const parent = MH.parentOf(element);
return parent ? getFlexDirection(parent) : null;
};
/**
* Returns true if the given element has a flex layout. If direction is given,
* then it also needs to match.
*
* @category DOM: Querying (optimized)
*
* @since v1.2.0
*/
export const isFlex = async (element: Element, direction?: FlexDirection) => {
const flexDirection = await getFlexDirection(element);
Iif (direction) {
return direction === flexDirection;
}
return flexDirection !== null;
};
/**
* Returns true if the given element's parent has a flex layout. If direction is
* given, then it also needs to match.
*
* @category DOM: Querying (optimized)
*
* @since v1.2.0
*/
export const isFlexChild = async (
element: Element,
direction?: FlexDirection,
) => {
const parent = MH.parentOf(element);
return parent ? isFlex(parent, direction) : false;
};
/**
* In milliseconds.
*
* @ignore
* @internal
*/
export const getMaxTransitionDuration = async (element: Element) => {
const propVal = await getComputedStyleProp(element, "transition-duration");
return MH.max(
...splitOn(propVal, ",", true).map((strValue) => {
let duration = MH.parseFloat(strValue) || 0;
Iif (strValue === duration + "s") {
duration *= 1000;
}
return duration;
}),
);
};
/**
* @ignore
* @internal
*/
export const disableInitialTransition = async (element: Element, delay = 0) => {
await addClasses(element, MC.PREFIX_TRANSITION_DISABLE);
if (delay) {
await waitForDelay(delay);
}
await waitForSubsequentMutateTime();
removeClassesNow(element, MC.PREFIX_TRANSITION_DISABLE);
};
/**
* @ignore
* @internal
*/
export const setHasModal = () => setBooleanData(MH.getBody(), PREFIX_HAS_MODAL);
/**
* @ignore
* @internal
*/
export const delHasModal = () => delData(MH.getBody(), PREFIX_HAS_MODAL);
/**
* @ignore
* @internal
*/
export const copyStyle = async (
fromElement: Element,
toElement: Element,
includeComputedProps?: string[],
) => {
Iif (!isDOMElement(fromElement) || !isDOMElement(toElement)) {
return;
}
await waitForMeasureTime();
const props: Record<string, string> = {};
Iif (includeComputedProps) {
for (const prop of includeComputedProps) {
props[prop] = getComputedStylePropNow(fromElement, prop);
}
}
const style = fromElement.style; // only inline styles
for (const prop in style) {
const value = style.getPropertyValue(prop);
Iif (value) {
props[prop] = value;
}
}
for (const prop in props) {
setStyleProp(toElement, prop, props[prop]);
}
addClasses(toElement, ...MH.classList(fromElement));
};
/**
* If the props keys are in camelCase they are converted to kebab-case
*
* If a value is null or undefined, the property is deleted.
*
* @ignore
* @internal
*/
export const setNumericStyleJsVarsNow = (
element: Element,
props: CssNumericProps,
options: {
_prefix?: string;
_units?: string;
_numDecimal?: number;
} = {},
) => {
Iif (!isDOMElement(element)) {
return;
}
const varPrefix = MH.prefixCssJsVar(options?._prefix ?? "");
for (const prop in props) {
const cssPropSuffix = camelToKebabCase(prop);
const varName = `${varPrefix}${cssPropSuffix}`;
let value: number | null;
if (!isValidNum(props[prop])) {
value = null;
} else {
value = props[prop];
const thisNumDecimal =
options?._numDecimal ?? (value > 0 && value < 1 ? 2 : 0);
value = roundNumTo(value, thisNumDecimal);
}
if (value === null) {
delStylePropNow(element, varName);
} else {
setStylePropNow(element, varName, value + (options?._units ?? ""));
}
}
};
/**
* @ignore
* @internal
*/
export const setNumericStyleJsVars = asyncMutatorFor(setNumericStyleJsVarsNow);
// ----------------------------------------
type CssNumericProps = Record<string, number | undefined | null>;
type CSSTransition = {
_cancel: () => undefined;
_finish: () => undefined;
_isCancelled: () => boolean;
};
const PREFIX_HAS_MODAL = MH.prefixName("has-modal");
const scheduledCSSTransitions = MH.newWeakMap<
Element,
Record<string, CSSTransition>
>();
const cancelCSSTransitions = (element: Element, ...toClasses: string[]) => {
const scheduledTransitions = scheduledCSSTransitions.get(element);
if (!scheduledTransitions) {
return;
}
for (const toCls of toClasses) {
const scheduledTransition = scheduledTransitions[toCls];
if (scheduledTransition) {
scheduledTransition._cancel();
}
}
};
const scheduleCSSTransition = (element: Element, toCls: string) => {
let scheduledTransitions = scheduledCSSTransitions.get(element);
if (!scheduledTransitions) {
scheduledTransitions = {};
scheduledCSSTransitions.set(element, scheduledTransitions);
}
let isCancelled = false;
scheduledTransitions[toCls] = {
_cancel: () => {
isCancelled = true;
MH.deleteObjKey(scheduledTransitions, toCls);
},
_finish: () => {
MH.deleteObjKey(scheduledTransitions, toCls);
},
_isCancelled: () => {
return isCancelled;
},
};
return scheduledTransitions[toCls];
};
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