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https://www.thinkwithgoogle.com/marketing-resources/data-measurement/mobile-page-speed-new-industry-benchmarks
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/* boilerplate goes here */
/* boilerplate goes here */
Hello World!
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HTTP2
CDN
Built-in Validator
AMP Viewer
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https://developers.google.com/web/fundamentals/performance/critical-rendering-path/
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https://developers.google.com/web/fundamentals/performance/rail
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https://www.w3.org/TR/resource-hints/#dfn-preconnect
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preconnectCallback(opt_onLayout) {
this.preconnect.url(
'https://cdn.embedly.com',
opt_onLayout
);
}
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const preconnect =
this.document_.createElement('link');
preconnect.setAttribute('rel', 'preconnect');
preconnect.setAttribute('href', origin);
preconnect.setAttribute('referrerpolicy', 'origin');
this.head_.appendChild(preconnect);
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...
html { Font-family:sans-serif; }
body { background-color: white; }
amp-img { border: 5px solid red; }
...
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for (let i = 0; i < paragraphs.length; i++) {
paragraphs[i].style.width = box.offsetWidth + 'px';
}
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const width = box.offsetWidth;
for (let i = 0; i < paragraphs.length; i++) {
paragraphs[i].style.width = width + 'px';
}
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window.requestAnimationFrame();
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IFRAME
document.write(
'<\/script>'
);
third-party-library.min.js
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CSS3 transitions
CSS3 3D transforms
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