get a href value javascript with code examples

JavaScript is a powerful programming language that can help you create dynamic and interactive content on your website. One of the most commonly used tasks in JavaScript is to retrieve the href value from an anchor tag. In this article, we will explore various ways to get a href value using JavaScript and provide concrete examples that you can use in your projects.

The basic syntax for getting the href value is:

var link = document.querySelector('a').href;

This code retrieves the first anchor element and its href attribute. However, in practice, there are many scenarios when you need to retrieve the href from a specific link or a set of links with a certain class, etc. Here are some examples of how to achieve this.

1. Get the href of a link with a specific ID

var linkId = document.getElementById('myLink');
var linkHref = linkId.href;

This code finds the anchor tag with the ID of ‘myLink’ and retrieves its href attribute. You can replace ‘myLink’ with the ID of your desired link.

2. Get the href of a link with a specific class

var linkClass = document.querySelector('.myClass');
var linkHref = linkClass.href;

This code finds the first anchor tag with the class of ‘myClass’ and retrieves its href attribute. If you have multiple links with the same class, it will only retrieve the href value of the first link. To get all the links with the same class, you can use the ‘querySelectorAll’ method:

var links = document.querySelectorAll('.myClass');

for (var i = 0; i < links.length; i++) {
    var linkHref = links[i].href;
}

This code retrieves all the anchor tags with the class of ‘myClass’ and loops through them to retrieve their href attributes one by one.

3. Get the href of the current page

var currentPageHref = window.location.href;

This code retrieves the href value of the current page.

4. Get the href of the parent page

var parentPageHref = window.parent.document.querySelector('a').href;

This code retrieves the first anchor tag in the parent page and its href attribute. You can modify the query selector to target a specific link on the parent page.

5. Get the href of the last link on the page

var links = document.getElementsByTagName('a');
var lastLinkHref = links[links.length - 1].href;

This code retrieves all the anchor tags on the page and retrieves the href value of the last link.

6. Get the href of links with a specific attribute value

var linksWithTargetBlank = document.querySelectorAll('a[target="_blank"]');

for (var i = 0; i < linksWithTargetBlank.length; i++) {
    var linkHref = linksWithTargetBlank[i].href;
}

This code retrieves all the anchor tags with the target attribute value of ‘_blank’ and loops through them to retrieve their href attributes one by one.

7. Get the href of links with a specific data attribute value

var linksWithDataAttribute = document.querySelectorAll('a[data-page="about"]');

for (var i = 0; i < linksWithDataAttribute.length; i++) {
    var linkHref = linksWithDataAttribute[i].href;
}

This code retrieves all the anchor tags with a data-page attribute value of ‘about’ and loops through them to retrieve their href attributes one by one.

In conclusion, there are many ways to retrieve the href value from an anchor tag using JavaScript. Depending on your specific needs, you can use one or a combination of these methods to get the desired result. JavaScript provides a powerful toolset to make your website dynamic and interactive, and knowing how to retrieve element attributes is an important part of that toolkit.

1. Get the href of a link with a specific ID

Getting the href value of a link with a specific ID is straightforward in JavaScript. You can use the document.getElementById() method to select the element and then retrieve its href attribute value. Here's an example code:

var linkId = document.getElementById('myLink');
var linkHref = linkId.href;

In this code, we first select the element with id "myLink" using getElementById(), and then retrieve its href value using the .href property.

2. Get the href of a link with a specific class

Similarly, you can retrieve the href value of a link with a specific class using the document.querySelector() method. Here's an example:

var linkClass = document.querySelector('.myClass');
var linkHref = linkClass.href;

In this code, we use the .querySelector() method to select the first element with the class name "myClass". Then, we retrieve its href attribute value using the .href property.

If there are multiple links with the same class name, you can use the .querySelectorAll() method to select them all. Here's an example:

var links = document.querySelectorAll('.myClass');

for (var i = 0; i < links.length; i++) {
  var linkHref = links[i].href;
}

In this code, we use the .querySelectorAll() method to retrieve all elements with the class name "myClass". Then, we loop through each of them and retrieve their href attribute values one by one.

3. Get the href of the current page

You can retrieve the href value of the current page using the window.location.href property. Here's how:

var currentPageHref = window.location.href;

In this code, we retrieve the value of window.location.href, which contains the URL of the current page.

4. Get the href of the parent page

You can retrieve the href value of the parent page using the window.parent property to access the parent window's document object. Here's an example:

var parentPageHref = window.parent.document.querySelector('a').href;

In this code, we retrieve the parent window's document object using window.parent.document. Then, we use the .querySelector() method to retrieve the first a element and its href attribute value.

5. Get the href of the last link on the page

You can retrieve the href value of the last link on the page using the document.getElementsByTagName() method to retrieve all a elements, and then accessing the last element in the resulting array. Here's an example:

var links = document.getElementsByTagName('a');
var lastLinkHref = links[links.length - 1].href;

In this code, we retrieve all a elements using document.getElementsByTagName('a'). Then, we retrieve the last element in the array using .length - 1, and retrieve its href attribute value using the .href property.

6. Get the href of links with a specific attribute value

You can retrieve the href value of links with a specific attribute value using the document.querySelectorAll() method. Here's an example:

var linksWithTargetBlank = document.querySelectorAll('a[target="_blank"]');

for (var i = 0; i < linksWithTargetBlank.length; i++) {
  var linkHref = linksWithTargetBlank[i].href;
}

In this code, we use the document.querySelectorAll() method to retrieve all a elements with the target attribute value of "_blank". Then, we loop through each element in the resulting array and retrieve its href attribute value using the .href property.

7. Get the href of links with a specific data attribute value

You can retrieve the href value of links with a specific data attribute value using the same document.querySelectorAll() method as above. Here's an example:

var linksWithDataAttribute = document.querySelectorAll('a[data-page="about"]');

for (var i = 0; i < linksWithDataAttribute.length; i++) {
  var linkHref = linksWithDataAttribute[i].href;
}

In this code, we use the document.querySelectorAll() method to select all a elements with the data-page attribute value of "about". Then, we loop through each element in the resulting array and retrieve its href attribute value using the .href property.

In conclusion, retrieving the href value of a link is a common and useful task in JavaScript. The aforementioned methods give you various ways to achieve this, depending on your specific needs. By using these methods, you can enhance the interactivity and dynamicity of your web pages.

Popular questions

1. What is the basic syntax for getting the href value using JavaScript?

• The basic syntax for getting the href value is: var link = document.querySelector('a').href; which retrieves the first anchor element and its href attribute.

2. How can you retrieve the href value of a link with a specific ID using JavaScript?

• You can use the document.getElementById() method to select the element and then retrieve its href attribute value. Example code:

var linkId = document.getElementById('myLink');
var linkHref = linkId.href;

3. How can you retrieve the href value of a link with a specific class using JavaScript?

• You can use the document.querySelector() method to select the first element with the class name and retrieve its href attribute value. Example code:

var linkClass = document.querySelector('.myClass');
var linkHref = linkClass.href;

• If there are multiple links with the same class name, you can use the .querySelectorAll() method to select them all and loop through each of them to retrieve their href attribute values.

4. How can you retrieve the href value of the current page using JavaScript?

• You can retrieve the href value of the current page using the window.location.href property. Example code:

var currentPageHref = window.location.href;

5. How can you retrieve the href value of links with a specific attribute value using JavaScript?

• You can use the document.querySelectorAll() method to select all links with a specific attribute value and loop through each to retrieve their href attribute values. Example code:

var linksWithTargetBlank = document.querySelectorAll('a[target="_blank"]');

for (var i = 0; i < linksWithTargetBlank.length; i++) {
  var linkHref = linksWithTargetBlank[i].href;
}

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