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abstain23 · May 29, 2020 · 37b556c · 37b556c
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diff --git a/浏览器渲染/async与defer.png b/浏览器渲染/async与defer.png
diff --git a/浏览器渲染/index.html b/浏览器渲染/index.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>Document</title>
+  <style>
+    .demo {
+      width: 100px;
+      height: 100px;
+      background-color: red;
+      /* position:absolute;
+      top: 0;
+      transform: translateZ(0); */
+      will-change: transfrom;
+    }
+  </style>
+</head>
+<body>
+  <div class="demo"></div>
+  <div style="width: 200px;height: 200px; margin-top: 200px;background-color: green;"></div>
+</body>
+</html>
diff --git a/防抖和节流/debounce.js b/防抖和节流/debounce.js
@@ -0,0 +1,20 @@
+const input = document.getElementById('input')
+
+input.addEventListener('keyup', debounce(ajax, 300)) 
+
+
+function ajax(e) {
+  console.log(e.target.value)
+  console.log(this)
+  console.log('ajax 请求')
+}
+
+function debounce(fn,delay) {
+  let timer
+  return function(...args) {
+    clearTimeout(timer)
+    timer = setTimeout(() => {
+      fn.apply(this, args)
+    }, delay)
+  }
+}
diff --git a/防抖和节流/index.html b/防抖和节流/index.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>Document</title>
+</head>
+<body>
+  函数防抖:<input type="text" name="" id="input">
+  函数节流:<input type="text" name="" id="input2">
+
+  <script src="./debounce.js"></script>
+  <script src="./throttle.js"></script>
+</body>
+</html>
diff --git a/防抖和节流/throttle.js b/防抖和节流/throttle.js
@@ -0,0 +1,31 @@
+const input2 = document.getElementById('input2')
+
+input2.addEventListener('keyup', debounce(ajax2, 1000)) 
+
+function ajax2(e) {
+  console.log(e.target.value)
+  console.log(this)
+  console.log('ajax 请求')
+}
+
+function throttle(fn, delay) {
+  let timer
+  return function(...args) {
+    if(timer) return
+    timer = setTimeout(() => {
+      fn.apply(this, args)
+      timer = null
+    }, delay)
+  }
+}
+
+function throttle2(fn, delay) {
+  let pre = 0
+  return function (...args) {
+    let now = new Date()
+    if(now - pre > delay) {
+      fn.apply(this, ...args)
+      pre = now
+    }
+  }
+}