今日随笔

removeNonASCII

Removes non-printable ASCII characters.

Use a regular expression to remove non-printable ASCII characters.

const removeNonASCII = str => str.replace(/[^\x20-\x7E]/g, '')

removeNonASCII('äÄçÇéÉêlorem-ipsumöÖÐþúÚ'); // 'lorem-ipsum'

Constant width to height ratio

iven an element of variable width, it will ensure its height remains proportionate in a responsive fashion (i.e., its width to height ratio remains constant).

html

<div class="constant-width-to-height-ratio"></div>

css

.constant-width-to-height-ratio {
  background: #333;
  width: 50%;
}
.constant-width-to-height-ratio::before {
  content: '';
  padding-top: 100%;
  float: left;
}
.constant-width-to-height-ratio::after {
  content: '';
  display: block;
  clear: both;
}

description
padding-top on the ::before pseudo-element causes the height of the element to equal a percentage of its width. 100% therefore means the element’s height will always be 100% of the width, creating a responsive square.

This method also allows content to be placed inside the element normally.

browser support

✅ No caveats.