How to get the hashtag value and ampersand value of a url in Javascript?

In JavaScript, retrieving the query string and anchor values from a URL is a common requirement, especially when handling GET request parameters or navigating to specific page sections. The following are specific methods:

Retrieving the URL's Query String

The query string refers to the part of the URL after the ? character, typically containing key-value pairs, such as https://example.com/page?name=John&age=30 where name=John&age=30 is the query string.

In JavaScript, you can use the built-in URLSearchParams object to parse this content. This is a practical approach as it provides various methods for handling query strings.

javascript
// Assume URL is: https://example.com/page?name=John&age=30
const queryString = window.location.search;

// Use URLSearchParams to parse the query string
const params = new URLSearchParams(queryString);

// Retrieve specific parameters
const name = params.get('name'); // Returns 'John'
const age = params.get('age'); // Returns '30'

Retrieving the URL's Anchor

The anchor refers to the part of the URL after the # character, used to point to a specific location on the page, such as https://example.com/page#section2 where section2 is the anchor.

In JavaScript, you can retrieve the current URL's anchor value using the location.hash property.

javascript
// Assume URL is: https://example.com/page#section2
const hash = window.location.hash;

// Returns '#section2'
console.log(hash);

// If you need to remove the leading # character, you can use the substring method
const cleanHash = hash.substring(1); // Returns 'section2'

Practical Application Example

Suppose you are developing a project management tool that needs to load specific project details based on URL query parameters and navigate to corresponding tabs using anchors.

javascript
// Retrieve project ID and tab
const params = new URLSearchParams(window.location.search);
const projectId = params.get('projectId'); // Retrieve project ID from URL
const hash = window.location.hash.substring(1); // Retrieve anchor value and remove # character

// Execute corresponding functionality based on retrieved values
loadProjectDetails(projectId); // Load project details
switchTab(hash); // Switch to corresponding tab

By using the above code, you can not only load specific content based on query parameters but also control the view display on the page using anchor values, thereby enhancing user experience and making URLs more descriptive.