50 lines
1.4 KiB
JavaScript
50 lines
1.4 KiB
JavaScript
import _slicedToArray from "@babel/runtime/helpers/esm/slicedToArray";
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import { useEffect, useRef, useState } from 'react';
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import { isImageValid } from "../util";
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export default function useStatus(_ref) {
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var src = _ref.src,
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isCustomPlaceholder = _ref.isCustomPlaceholder,
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fallback = _ref.fallback;
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var _useState = useState(isCustomPlaceholder ? 'loading' : 'normal'),
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_useState2 = _slicedToArray(_useState, 2),
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status = _useState2[0],
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setStatus = _useState2[1];
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var isLoaded = useRef(false);
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var isError = status === 'error';
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// https://github.com/react-component/image/pull/187
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useEffect(function () {
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isImageValid(src).then(function (isValid) {
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if (!isValid) {
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setStatus('error');
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}
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});
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}, [src]);
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useEffect(function () {
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if (isCustomPlaceholder && !isLoaded.current) {
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setStatus('loading');
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} else if (isError) {
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setStatus('normal');
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}
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}, [src]);
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var onLoad = function onLoad() {
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setStatus('normal');
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};
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var getImgRef = function getImgRef(img) {
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isLoaded.current = false;
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if (status !== 'loading') {
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return;
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}
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if (img !== null && img !== void 0 && img.complete && (img.naturalWidth || img.naturalHeight)) {
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isLoaded.current = true;
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onLoad();
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}
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};
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var srcAndOnload = isError && fallback ? {
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src: fallback
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} : {
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onLoad: onLoad,
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src: src
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};
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return [getImgRef, srcAndOnload, status];
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} |