1 | import { useState, useEffect } from 'react';
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27 | export default function useImage(imageOrUrl, crossOrigin) {
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28 | const [state, setState] = useState({
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29 | image: null,
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30 | error: null
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31 | });
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32 | useEffect(() => {
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33 | if (!imageOrUrl) return undefined;
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34 | let image;
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35 | if (typeof imageOrUrl === 'string') {
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36 | image = new Image();
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37 | if (crossOrigin) image.crossOrigin = crossOrigin;
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38 | image.src = imageOrUrl;
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39 | } else {
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40 | image = imageOrUrl;
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41 | if (image.complete && image.naturalHeight > 0) {
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42 | setState({
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43 | image,
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44 | error: null
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45 | });
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46 | return;
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47 | }
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48 | }
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49 | function onLoad() {
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50 | setState({
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51 | image,
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52 | error: null
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53 | });
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54 | }
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55 | function onError(error) {
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56 | setState({
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57 | image,
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58 | error
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59 | });
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60 | }
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61 | image.addEventListener('load', onLoad);
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62 | image.addEventListener('error', onError);
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63 | return () => {
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64 | image.removeEventListener('load', onLoad);
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65 | image.removeEventListener('error', onError);
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66 | };
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67 | }, [imageOrUrl, crossOrigin]);
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68 | return state;
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69 | } |
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