add hw2

node_modules/html-to-image/es/dataurl.js

@@ -0,0 +1,76 @@
+function getContentFromDataUrl(dataURL) {
+    return dataURL.split(/,/)[1];
+}
+export function isDataUrl(url) {
+    return url.search(/^(data:)/) !== -1;
+}
+export function makeDataUrl(content, mimeType) {
+    return `data:${mimeType};base64,${content}`;
+}
+export async function fetchAsDataURL(url, init, process) {
+    const res = await fetch(url, init);
+    if (res.status === 404) {
+        throw new Error(`Resource "${res.url}" not found`);
+    }
+    const blob = await res.blob();
+    return new Promise((resolve, reject) => {
+        const reader = new FileReader();
+        reader.onerror = reject;
+        reader.onloadend = () => {
+            try {
+                resolve(process({ res, result: reader.result }));
+            }
+            catch (error) {
+                reject(error);
+            }
+        };
+        reader.readAsDataURL(blob);
+    });
+}
+const cache = {};
+function getCacheKey(url, contentType, includeQueryParams) {
+    let key = url.replace(/\?.*/, '');
+    if (includeQueryParams) {
+        key = url;
+    }
+    // font resource
+    if (/ttf|otf|eot|woff2?/i.test(key)) {
+        key = key.replace(/.*\//, '');
+    }
+    return contentType ? `[${contentType}]${key}` : key;
+}
+export async function resourceToDataURL(resourceUrl, contentType, options) {
+    const cacheKey = getCacheKey(resourceUrl, contentType, options.includeQueryParams);
+    if (cache[cacheKey] != null) {
+        return cache[cacheKey];
+    }
+    // ref: https://developer.mozilla.org/en/docs/Web/API/XMLHttpRequest/Using_XMLHttpRequest#Bypassing_the_cache
+    if (options.cacheBust) {
+        // eslint-disable-next-line no-param-reassign
+        resourceUrl += (/\?/.test(resourceUrl) ? '&' : '?') + new Date().getTime();
+    }
+    let dataURL;
+    try {
+        const content = await fetchAsDataURL(resourceUrl, options.fetchRequestInit, ({ res, result }) => {
+            if (!contentType) {
+                // eslint-disable-next-line no-param-reassign
+                contentType = res.headers.get('Content-Type') || '';
+            }
+            return getContentFromDataUrl(result);
+        });
+        dataURL = makeDataUrl(content, contentType);
+    }
+    catch (error) {
+        dataURL = options.imagePlaceholder || '';
+        let msg = `Failed to fetch resource: ${resourceUrl}`;
+        if (error) {
+            msg = typeof error === 'string' ? error : error.message;
+        }
+        if (msg) {
+            console.warn(msg);
+        }
+    }
+    cache[cacheKey] = dataURL;
+    return dataURL;
+}
+//# sourceMappingURL=dataurl.js.map