51 lines
1.6 KiB
JavaScript
51 lines
1.6 KiB
JavaScript
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import { isCSSVariableName } from '../../render/dom/utils/is-css-variable.mjs';
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import { transformProps } from '../../render/html/utils/transform.mjs';
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import { addUniqueItem, removeItem } from '../../utils/array.mjs';
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import { useConstant } from '../../utils/use-constant.mjs';
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import { MotionValue } from '../index.mjs';
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import { camelToDash } from '../../render/dom/utils/camel-to-dash.mjs';
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class WillChangeMotionValue extends MotionValue {
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constructor() {
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super(...arguments);
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this.members = [];
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this.transforms = new Set();
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}
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add(name) {
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let memberName;
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if (transformProps.has(name)) {
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this.transforms.add(name);
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memberName = "transform";
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}
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else if (!name.startsWith("origin") &&
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!isCSSVariableName(name) &&
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name !== "willChange") {
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memberName = camelToDash(name);
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}
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if (memberName) {
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addUniqueItem(this.members, memberName);
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this.update();
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}
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}
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remove(name) {
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if (transformProps.has(name)) {
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this.transforms.delete(name);
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if (!this.transforms.size) {
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removeItem(this.members, "transform");
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}
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}
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else {
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removeItem(this.members, camelToDash(name));
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}
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this.update();
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}
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update() {
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this.set(this.members.length ? this.members.join(", ") : "auto");
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}
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}
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function useWillChange() {
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return useConstant(() => new WillChangeMotionValue("auto"));
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}
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export { WillChangeMotionValue, useWillChange };
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