perf(shared): throttle节流修改

varletjs · Nov 10, 2021 · 981183c · 981183c
1 parent 86ae000
commit 981183c
Showing 1 changed file with 4 additions and 3 deletions.
diff --git a/packages/varlet-ui/src/utils/shared.ts b/packages/varlet-ui/src/utils/shared.ts
@@ -81,10 +81,11 @@ export const removeItem = (arr: Array<unknown>, item: unknown) => {
 
 export const throttle = (method: any, mustRunDelay = 200): (() => void) => {
   let timer: number
-  let start: number
+  let start = 0
 
   return function loop(this: unknown, ...args) {
     const now = Date.now()
+    const elapsed = now - start
 
     if (!start) {
       start = now
@@ -94,13 +95,13 @@ export const throttle = (method: any, mustRunDelay = 200): (() => void) => {
       window.clearTimeout(timer)
     }
 
-    if (now - start >= mustRunDelay) {
+    if (elapsed >= mustRunDelay) {
       method.apply(this, args)
       start = now
     } else {
       timer = window.setTimeout(() => {
         loop.apply(this, args)
-      }, 50)
+      }, mustRunDelay - elapsed)
     }
   }
 }