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Monday, April 15, 2024

Add Dependent Scripts

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 here is the code that allow to add dependent script :

 

 

    <script>
        const addDependentScripts = async function( scriptsToAdd ) {
        const s=document.createElement('script')
        for ( var i = 0; i < scriptsToAdd.length; i++ ) {
            let r = await fetch( scriptsToAdd[i] )
            s.text += await r.text()
        }
        document.querySelector('body').appendChild(s)
        }
         </script> 


Uses as below :

       <script>

    try {
        addDependentScripts( [
            "https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js",
            "https://cdn.mywebshopapp.com/test/a1.js",
            "https://cdn.mywebshopapp.com/test/a2.js",
            "https://cdn.mywebshopapp.com/test/a3.js",
            "https://cdn.mywebshopapp.com/test/a4.js"
        ] );
        }
        catch (err) { }

       </script>

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Sunday, March 10, 2024

Multiple attribute passing in querySelectorAll

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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

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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

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 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

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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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Thursday, January 25, 2024

Define own custom HTML element

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 Define own custom HTML element


Here I am demonstrating how to define your own custom HTML element or control and how to use it.

Define is as <my-test-element-one> </my-test-element-one>
and then use my JavaScript. The complete code it below:

<!DOCTYPE html>
<html lang="en">
  <head>
    <title>Hello!</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>
<my-test-element-one>
</my-test-element-one>
<script>
class my_test_element_one extends HTMLElement{
  connectedCallback(){
    this.innerHTML=`  <div class="myclass" style=" width:600px;height:500px; background-color:green">
            <img src="https://images.pexels.com/photos/267415/pexels-photo-267415.jpeg?auto=compress&cs=tinysrgb&w=300" />
    </div>`
  }
}
customElements.define('my-test-element-one', my_test_element_one);
</script>
</body>
</html>

 

 

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Sunday, January 07, 2024

Show array data without for loop in javascript

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 Show array data without for loop in javascript

 

Use below code  

<script>

const strs1 = ["one ", "two", "three"];
const newst1 = strs.map(st => { console.log(st)});

const mynum = [1, 2, 3];
const newnum = mynum.map(num =>  { console.log(num)});
</script>

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Add Dependent Scripts

   here is the code that allow to add dependent script :         <script>         const addDependentScripts = async function( scriptsT...

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