WWR

```javascript 1. document.getElementsByTagName('a') document.querySelectorAll('a') 2. var ellinks = document.getElementsByTagName('link'); var elas = document.getElementsByTagName('a') 3. [...Array.from(ellinks), ...Array.from(elas)].map(el => { let hrefS = el.getAttribute('href') if( hrefS && hrefS.startsWith('javascript:') ) { el.setAttribute('role', 'button');...

[在线demo](https://codepen.io/wwr1234567/pen/xedrXG) ```javascript window.onload = function () { // question1 start var sliderDiv = document.createElement("div"); sliderDiv.className = "slider" sliderDiv.innerHTML = '' document.body.append(sliderDiv) // question1 end // question2 start sliderDiv.style.setProperty('--percent', "50") //...

```css dl { font-size: 0; } dt, dd { display: inline-block; width: 50%; margin-inline-start: 0; font-size: 12px; } dd { text-align: right; } ```