Run results for: 1 css var - style.setProperty vs style.cssText vs style vs Object.assign vs setAttribute

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Mobile Safari/537.36

Browser: Chrome Mobile 118

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

HTML Preparation code:

<div id="test"><div style="height: calc(var(--w, 1) * 1px); background-color:red;"></div></div>

AخA
 
<div id="test"><div style="height: calc(var(--w, 1) * 1px); background-color:red;"></div></div>

Script Preparation code:

el = document.getElementById("test");
rn = ()=>Math.floor(10+Math.random(5));

 
el = document.getElementById("test");rn = ()=>Math.floor(10+Math.random(5));

Tests:

let i = 0;

while (i < 10000) {
  el.style = `--w: ${rn()};`;
  i++;
}

 
let i = 0;​while (i < 10000) {  el.style = `--w: ${rn()};`;  i++;}

let i = 0;

while (i < 10000) {
  Object.assign(el.style, {
  ['--w']: rn(),


});
  i++;
}

 
​let i = 0;​while (i < 10000) {  Object.assign(el.style, {  ['--w']: rn(),​​});  i++;}