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How to use addPrefetch method in wpt

Best JavaScript code snippet using wpt

light-yt-embed.js

Source:light-yt-embed.js

...29         */30        if (!this.style.backgroundImage) {31          this.posterUrl = `https://i.ytimg.com/vi/${this.videoId}/maxresdefault.jpg`;32          // Warm the connection for the poster image33          LiteYTEmbed.addPrefetch('preload', this.posterUrl, 'image');3435          this.style.backgroundImage = `url("${this.posterUrl}")`;36        }3738        // Set up play button, and its visually hidden label39        if (!playBtnEl) {40            playBtnEl = document.createElement('button');41            playBtnEl.type = 'button';42            playBtnEl.classList.add('lty-playbtn');43            this.append(playBtnEl);44        }45        if (!playBtnEl.textContent) {46            const playBtnLabelEl = document.createElement('span');47            playBtnLabelEl.className = 'lyt-visually-hidden';48            playBtnLabelEl.textContent = this.playLabel;49            playBtnEl.append(playBtnLabelEl);50        }5152        // On hover (or tap), warm up the TCP connections we're (likely) about to use.53        this.addEventListener('pointerover', LiteYTEmbed.warmConnections, {once: true});5455        // Once the user clicks, add the real iframe and drop our play button56        // TODO: In the future we could be like amp-youtube and silently swap in the iframe during idle time57        //   We'd want to only do this for in-viewport or near-viewport ones: https://github.com/ampproject/amphtml/pull/500358        this.addEventListener('click', e => this.addIframe());59    }6061    // // TODO: Support the the user changing the [videoid] attribute62    // attributeChangedCallback() {63    // }6465    /**66     * Add a <link rel={preload | preconnect} ...> to the head67     */68    static addPrefetch(kind, url, as) {69        const linkEl = document.createElement('link');70        linkEl.rel = kind;71        linkEl.href = url;72        if (as) {73            linkEl.as = as;74        }75        document.head.append(linkEl);76    }7778    /**79     * Begin pre-connecting to warm up the iframe load80     * Since the embed's network requests load within its iframe,81     *   preload/prefetch'ing them outside the iframe will only cause double-downloads.82     * So, the best we can do is warm up a few connections to origins that are in the critical path.83     *84     * Maybe `<link rel=preload as=document>` would work, but it's unsupported: http://crbug.com/59326785     * But TBH, I don't think it'll happen soon with Site Isolation and split caches adding serious complexity.86     */87    static warmConnections() {88        if (LiteYTEmbed.preconnected) return;8990        // The iframe document and most of its subresources come right off youtube.com91        LiteYTEmbed.addPrefetch('preconnect', 'https://www.youtube-nocookie.com');92        // The botguard script is fetched off from google.com93        LiteYTEmbed.addPrefetch('preconnect', 'https://www.google.com');9495        // Not certain if these ad related domains are in the critical path. Could verify with domain-specific throttling.96        LiteYTEmbed.addPrefetch('preconnect', 'https://googleads.g.doubleclick.net');97        LiteYTEmbed.addPrefetch('preconnect', 'https://static.doubleclick.net');9899        LiteYTEmbed.preconnected = true;100    }101102    addIframe() {103        const params = new URLSearchParams(this.getAttribute('params') || []);104        params.append('autoplay', '1');105106        const iframeEl = document.createElement('iframe');107        iframeEl.width = 560;108        iframeEl.height = 315;109        // No encoding necessary as [title] is safe. https://cheatsheetseries.owasp.org/cheatsheets/Cross_Site_Scripting_Prevention_Cheat_Sheet.html#:~:text=Safe%20HTML%20Attributes%20include110        iframeEl.title = this.playLabel;111        iframeEl.allow = 'accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture';
...

lite-yt-embed.js

Source:lite-yt-embed.js

...27         */28        if (!this.style.backgroundImage) {29            this.posterUrl = `https://i.ytimg.com/vi/${this.videoId}/hqdefault.jpg`;30            // Warm the connection for the poster image31            LiteYTEmbed.addPrefetch('preload', this.posterUrl, 'image');32            this.style.backgroundImage = `url("${this.posterUrl}")`;33        }34        // Set up play button, and its visually hidden label35        if (!playBtnEl) {36            playBtnEl = document.createElement('button');37            playBtnEl.type = 'button';38            playBtnEl.classList.add('lty-playbtn');39            this.append(playBtnEl);40        }41        if (!playBtnEl.textContent) {42            const playBtnLabelEl = document.createElement('span');43            playBtnLabelEl.className = 'lyt-visually-hidden';44            playBtnLabelEl.textContent = this.playLabel;45            playBtnEl.append(playBtnLabelEl);46        }47        // On hover (or tap), warm up the TCP connections we're (likely) about to use.48        this.addEventListener('pointerover', LiteYTEmbed.warmConnections, { once: true });49        // Once the user clicks, add the real iframe and drop our play button50        // TODO: In the future we could be like amp-youtube and silently swap in the iframe during idle time51        //   We'd want to only do this for in-viewport or near-viewport ones: https://github.com/ampproject/amphtml/pull/500352        this.addEventListener('click', e => this.addIframe());53    }54    // // TODO: Support the the user changing the [videoid] attribute55    // attributeChangedCallback() {56    // }57    /**58     * Add a <link rel={preload | preconnect} ...> to the head59     */60    static addPrefetch(kind, url, as) {61        const linkEl = document.createElement('link');62        linkEl.rel = kind;63        linkEl.href = url;64        if (as) {65            linkEl.as = as;66        }67        document.head.append(linkEl);68    }69    /**70     * Begin pre-connecting to warm up the iframe load71     * Since the embed's network requests load within its iframe,72     *   preload/prefetch'ing them outside the iframe will only cause double-downloads.73     * So, the best we can do is warm up a few connections to origins that are in the critical path.74     *75     * Maybe `<link rel=preload as=document>` would work, but it's unsupported: http://crbug.com/59326776     * But TBH, I don't think it'll happen soon with Site Isolation and split caches adding serious complexity.77     */78    static warmConnections() {79        if (LiteYTEmbed.preconnected) return;80        // The iframe document and most of its subresources come right off youtube.com81        LiteYTEmbed.addPrefetch('preconnect', 'https://www.youtube-nocookie.com');82        // The botguard script is fetched off from google.com83        LiteYTEmbed.addPrefetch('preconnect', 'https://www.google.com');84        // Not certain if these ad related domains are in the critical path. Could verify with domain-specific throttling.85        LiteYTEmbed.addPrefetch('preconnect', 'https://googleads.g.doubleclick.net');86        LiteYTEmbed.addPrefetch('preconnect', 'https://static.doubleclick.net');87        LiteYTEmbed.preconnected = true;88    }89    addIframe() {90        const params = new URLSearchParams(this.getAttribute('params') || []);91        params.append('autoplay', '1');92        const iframeEl = document.createElement('iframe');93        iframeEl.width = 560;94        iframeEl.height = 315;95        // No encoding necessary as [title] is safe. https://cheatsheetseries.owasp.org/cheatsheets/Cross_Site_Scripting_Prevention_Cheat_Sheet.html#:~:text=Safe%20HTML%20Attributes%20include96        iframeEl.title = this.playLabel;97        iframeEl.allow = 'accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture';98        iframeEl.allowFullscreen = true;99        // AFAIK, the encoding here isn't necessary for XSS, but we'll do it only because this is a URL100        // https://stackoverflow.com/q/64959723/89484...

Using AI Code Generation

1wpt.addCookie('cookieName', 'cookieValue');2wpt.addHeader('headerName', 'headerValue');3wpt.setScript('testScript.js');4wpt.setLabel('testLabel');5wpt.setVideo(true);6wpt.setVideoCapture(true);7wpt.setVideoCaptureLimit(1);8wpt.setVideoCaptureStart('testVideoCaptureStart');9wpt.setVideoParams('testVideoParams');10wpt.setVideoFullResolution(true);11wpt.setVideoCodec('testVideoCodec');12wpt.setVideoFramerate(1);13wpt.setVideoScreenSize('testVideoScreenSize');14wpt.setVideoPostProcessing(true);15wpt.setTimeline(true);16wpt.setTimelineParams('testTimelineParams');17wpt.setNetlog(true);

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