Answer1215

摘要： It is a good pratice to add ref="noopener" <a href="/some/domain" target="_blank" rel="noopener" /> Because when the new page is opened, in the new pa 阅读全文

摘要： http://udacity.github.io/responsive-images/examples/3-08/pictureFullMonty/ 阅读全文

摘要： What if the image won't be displayed at the full viewport width? Then you need something more than srcset, which assumes the image will be full viewpo 阅读全文

摘要： 1. Pure CSS 2. Responsive 3. No need to recalculate on resize or font’s load event 4. Cross browser 阅读全文

摘要： In this lesson we'll explore using setState to synchronously update in componentDidMount. This allows for us to use getBoundingClientRect or other syn 阅读全文

摘要： In this lesson we are going to use CSS variables to keep our application's colors consistent. This includes defining the variables inside our the pseu 阅读全文

摘要： The main reason you want to do I"nlining images with SVG and data URIs" is to reduce http request. If you doing "Inlining images with SVG and data URI 阅读全文

摘要： // Asynchronous iteration --> Symbol.asyncIterator async function main() { const syncIterable = [ Promise.resolve('a'), Promise.resolve('b'), ]; for await (const x of sync... 阅读全文

摘要： In this lesson, you will learn how to implement pytest fixtures. Many unit tests have the same resource requirements. For example, an instantiated obj 阅读全文

摘要： Body with background image and gradient Body with elaborate background using only CSS Using CSS background images for conditional image display Using 阅读全文