<style>
.heading {
color: red;
}
.button {
font-size: 18px;
}
.skyblue {
background-color: skyblue;
}
</style>
<h1 class="heading" data-mh="item1">Hello World</h1>
<button class="button" id="item1">Click Here</button>
<h1 class="heading" data-mh="item2">Hello World</h1>
<button class="button" id="item2">Click Here</button>
<h1 class="heading" data-mh="item3">Hello World</h1>
<button class="button" id="item3">Click Here</button>
<p id="demo"></p>
<!-- This Paragraph tag will print my attribute -->
<!-- HTML End -->
<script>
var x = document.querySelector(".heading").getAttribute("data-mh"); // This variable is to get Attribute of "data-mh"
var y = document.querySelector(".button"); // Button selection. By clicking this button I will get print my Attribute
var z = y.getAttribute("id"); // Getting button id to compaire with "data-mh" attribute
y.onclick = function() {
//If X (ID) and Z (Attribute) matching then working this Condition
if (x == z) {
y.classList.toggle("skyblue");
document.getElementById("demo").innerHTML = x+" "+z; // This line of code will print my Attribute on P tag
}
}
</script>
This code does the task by looping over each button and doing all the setup for event listeners and comparision.
// select all the buttons
const buttons = document.querySelectorAll(".button");
// loop over each one
for(const button of buttons)
{
// add an on click listener
button.addEventListener("click", (event) => {
// get the button ID
const x = button.getAttribute("id");
/// get the previous element's (the heading's) data-mh attribute
const z = button.previousElementSibling.getAttribute("data-mh");
// compare them
if(x == z)
{
button.classList.toggle("skyblue");
document.getElementById("demo").innerHTML = x+" "+z;
}
});
}Here is a demo: https://jsfiddle.net/w3d0z8Ly/
check my answer:-
var x = document.querySelectorAll(".heading"); // This variable is to get Attribute of "data-mh"
var y = document.querySelectorAll(".button"); // Button selection. By clicking this button I will get print my Attribute
// var z = y.getAttribute("id"); // Getting button id to compaire with "data-mh" attribute
function btnClick(e) {
for(var i = 0; i < x.length; i++) {
if(e.getAttribute("id") == x[i].getAttribute("data-mh")) {
document.getElementById("demo").innerHTML = x[i].getAttribute("data-mh");
}
}
for(var j = 0; j < y.length; j++) {
y[j].classList.remove("skyblue");
}
e.classList.add("skyblue");
}
.heading {
color: red;
}
.button {
font-size: 18px;
}
.skyblue {
background-color: skyblue;
}<h1 class="heading" data-mh="item1">Hello World</h1><button class="button" id="item1" onClick="btnClick(this)">Click Here</button>
<h1 class="heading" data-mh="item2">Hello World</h1>
<button class="button" id="item2" onClick="btnClick(this)">Click Here</button>
<h1 class="heading" data-mh="item3">Hello World</h1>
<button class="button" id="item3" onClick="btnClick(this)">Click Here</button>
<p id="demo"></p>Please check this
const buttons = document.querySelectorAll(".button");
const headings = document.querySelectorAll(".heading");
for (const button of buttons) {
for (const heading of headings) {
button.addEventListener("click", (event) => {
const x = button.getAttribute("id");
const z = heading.getAttribute("data-mh");
if (x == z) {
button.classList.toggle("skyblue");
document.getElementById("demo").innerHTML = x + " " + z;
}
});
}
}