perf: should patch string style when value is changed

fix vuejs#1309
underfin · Jun 6, 2020 · 4c31a9e · 4c31a9e
1 parent 4a5021e
commit 4c31a9e
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/packages/runtime-dom/src/modules/style.ts b/packages/runtime-dom/src/modules/style.ts
@@ -8,7 +8,9 @@ export function patchStyle(el: Element, prev: Style, next: Style) {
  if (!next) {
  el.removeAttribute('style')
  } else if (isString(next)) {
- style.cssText = next
+ if (prev !== next) {
+ style.cssText = next
+ }
  } else {
  for (const key in next) {
  setStyle(style, key, next[key] as string)