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Sunday, March 10, 2024

Multiple attribute passing in querySelectorAll

Multiple attribute passing in querySelectorAll

 

 
Here I am demonstrating code to how to pass multiple attributes in querySelectorAll.

<!DOCTYPE html>
<html lang="en">
<head>
<title>Multiple attribute passing in querySelectorAll</title>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
</head>
<body>
<div id="mydiv1" width="200" height="200";> MyDiv1 </div>
<div id="mydiv2" width="200" height="200";> MyDiv2 </div>
<div id="mydiv3" width="200" height="200";> MyDiv3 </div>
<div id="mydiv4" width="200" height="200";> MyDiv4 </div>

<div id="mydiv6" class="class1" width="200" height="200";>My Divclass1</div>
<div id="mydiv6" class="class2" width="200" height="200";>My Divclass2</div>
<div id="mydiv6" class="class3" width="200" height="200";>My Divclass3</div>

<div id="myid1">myid1</div>
<div id="myid2">myid2</div>
<div id="myid3">myid3</div>

<div id="myid4" class="myclass1 myclass2 myclass3">
myid4 myclass1 myclass2 myclass3
</div>

<script>
const Test1=()=>{
 document.querySelectorAll("div[id=mydiv1],div[id=mydiv2],div[id=mydiv4]").forEach((elem)=>{
   console.log(elem.innerHTML);
 });
}
Test1();

function Test2(){
 document.querySelectorAll("div[class=class1],div[class=class3]").forEach(function(elem){
   console.log(elem.innerHTML);
 });
}
Test2();


const Test3=()=>{
 document.querySelectorAll("#myid1,#myid2,#myid3").forEach((elem)=>{
   console.log(elem.innerHTML);
 });
}
Test3();

const Test4=()=>{
 document.querySelectorAll(".myclass1.myclass2.myclass3[id=myid4]").forEach((elem)=>{
   console.log(elem.innerHTML);
 });
}
Test4();
</script>

</body>
</html>



 

 

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How to make load image fast

How to make load image fast

Images are main parts of any website, Because It says lots of things than text. So it is important to load it fast as much as fast.

To load image fast use below attributes

<link rel="preload" as="image" href="https://site.com/imgs/image.jpg">


<img fetchpriority="high" decoding="async"
src="https://site.com/imgs/image.jpg"
class="myclass" alt="myimage"
width="765"
height="599">

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Enable or Disable files folder structure in website domain

 Enable or Disable files folder structure in website domain

Sometime when you type the url or website domain then files and folder structure show. This is normally for the test servers with no security.
Sometime it is useful for testing of different pages and folder etc, because all files and folder show and user can test any files etc. But if you want to apply the security that no any files and folders show then use below code in .htaccess file. if you have no .htaccess files create it. Code is for show files and directory is :
Options +Indexes
This is for show files and folders.
For do not show files and folders use below code:
Options -Indexes




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Apply CSS via JavaScript

 

Here is the example where apply css via JavaScript

<script>

const mstyle = document.head.appendChild(document.createElement(‘style’));
style.textContent = /*this is the css*/`

.myclass {
aspect-ratio: 16 / 9; background-color: #000;
position: relative; display: block; contain: content;
background-position: center center;
background-size: cover;

}

#mydivid {
color:green; opacity: 0;
}
`;

</script>

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How to make center align child div

 How to make center align child div?   Suppose you have 2 Div tag. And want the make inner tag center <div id="d1">      ...

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