forked from priya42bagde/JavaScript-with-JC
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathDebouncing.html
More file actions
110 lines (85 loc) · 3.54 KB
/
Copy pathDebouncing.html
File metadata and controls
110 lines (85 loc) · 3.54 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
<!-- 💡"JavaScript-with-JC"
👉 Debouncing Implementation
Debouncing is a technique used to improve the performance of applications by reducing the rate of functions call
👉 If the function is getting called continuously, We can delay the function call for some time
with the help of debouncing to optimize the performance of applications
💡Let's take an example search input value-
💡Other use cases :-
👉 Continous button click event function call can be delay.
👉 Resize of window event function call can be delay.
-->
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<div style="display: grid; place-items: center; min-height: 50vh;">
<div>
<label for="normalSearch">Normal Search</label>
<input id="normalSearch" onkeyup="normalFunction()" />
</div>
<div>
<label for="debounceSearch">Debouced Search</label>
<input id="debounceSearch" onkeyup="debouncedFunction()" />
</div>
</div>
<script>
let normalCount = 0
let deboucedCount = 0
// 💡 1) simple debounce method
const debounce = function (callback, delay) {
let timer;
// debounce 👇 returns a new anonymous function (closure)
return function () {
const context = this
const args = arguments
// 👇 clearing previous timeout
clearTimeout(timer)
timer = setTimeout(() => {
callback.apply(context, args)
}, delay)
}
}
// 💡 2) debounce with immediate flag
const debounceImmediate = function (callback, delay, immediate) {
let timer;
// debounce 👇 returns a new anonymous function (closure)
return function () {
const context = this
const args = arguments
// If in immediate mode and no timeout is set then call callback fn
const callNow = immediate && !timer
// 👇 clearing previous timeout
clearTimeout(timer)
timer = setTimeout(() => {
// 👇 making timer null for next call in immediate mode
timer = null
// 👇 only call this when not in immediate mode
if (!immediate) {
callback.apply(context, args)
}
}, delay)
if (callNow) { callback.apply(this, arguments) }
}
}
// 👇 debouced function will be called after a delay time without it being called
const searchData = () => {
deboucedCount++
const searchValue = document.getElementById('debounceSearch').value
console.log("Debounced Search for....", searchValue, "count", deboucedCount);
}
const debouncedFunction = debounce(searchData, 500)
// const debouncedFunction = debounceImmediate(searchData, 500, true)
// 👇 normal function will be called for each onkeyup event
const normalFunction = () => {
normalCount++
const searchValue = document.getElementById('normalSearch').value
console.log("Normal Search for....", searchValue, "count", normalCount);
}
</script>
</body>
</html>