Web Front-end
JS Tutorial
How to store all dates existing between given two dates in an array in JavaScript?
How to store all dates existing between given two dates in an array in JavaScript?
Sometimes, we need to get all dates within a given date range. In this tutorial, we will take two dates and find all dates between the two dates. Additionally, we will store all dates in an array.
Here we will learn three ways to store all dates in an array between given two dates in JavaScript.
Use while loop and setDate() method
We can use a while loop to iterate and use the setDate() method to set the date in the date object. In each iteration of the while loop, we can increment the date by one day and set it to date1.
grammar
Users can use the while loop and setDate() method according to the following syntax to get all dates between two dates.
while (date1 <= date2) {
dateArray.push(new Date(date1));
date1.setDate(date1.getDate() + 1);
}
In the above syntax, date1 is the start date and date2 is the end date.
algorithm
Step 1 – Create two dates.
Step 2 – Using a while loop, check if date1 is less than date2.
Step 3 – Create a new date from date1 and push it to dateArray.
Step 4 – Get the date from date1 using the getDate() method and add 1.
Step 5 – Set the new date using the setDate() method.
Example 1
In the following example, we created date1 and date2 using Date objects. After that, we implemented the above algorithm to get all dates between two dates. In the output, the user can observe all dates between date1 and date2.
<html>
<body>
<h2>Using the <i> setDate() method and while loop</i> to get all dates between two dates in the array format. </h2>
<div id = "output"></div>
<script>
var output = document.getElementById('output');
var date1 = new Date("2023-01-01");
var date2 = new Date("2023-01-11");
output.innerHTML += "The date1 is " + date1 + "<br/>";
output.innerHTML += "The date2 is " + date2 + "<br/>";
var dateArray = [];
while (date1 <= date2) {
dateArray.push(new Date(date1));
date1.setDate(date1.getDate() + 1);
}
output.innerHTML += "The date array is <br/>";
for (let i = 0; i < dateArray.length; i++) {
output.innerHTML += dateArray[i] + " <br/>";
}
</script>
</body>
</html>
Total milliseconds using a for loop and date
In this method we will get the total milliseconds of the first and second date. After that, we will proceed to add the milliseconds of 1 day to the total milliseconds of the current date and using the new milliseconds, we can create a date.
This way, we can find all dates between given two dates and store them in an array.
grammar
Users can follow the syntax below to get all dates between two dates using a for loop and the total milliseconds of the date.
for (var currentMillis = startMillis; currentMillis < lastMillis; currentMillis += milliOf1Day) {
// pushing updated date to the array
dateArray.push(new Date(currentMillis));
}
In the above syntax, milliOf1Day is the total number of milliseconds in a day.
algorithm
Step 1 – Get the total number of milliseconds between the current date and the last date.
Step 2 – Use a for loop and initialize the currentMillis variable with the total number of milliseconds from the start date.
Step 3 – Use a for loop to iterate until you find that the current milliseconds are less than the milliseconds of the last date.
Step 4 – Additionally, add 1 day of milliseconds to currentMillis.
Step 5 – Create a new date using currentMillis and push it to the dateArray variable in the for loop.
Example 2
In this example we have the milliOf1Day variable which stores the total number of milliseconds for 1 day. After that, we implement the above algorithm using for loop and milliseconds to get all dates between two dates.
<html>
<body>
<h2>Using the <i> setDate() method and while loop </i> to get all dates between two dates in the array format. </h2>
<div id = "output"></div>
<script>
var output = document.getElementById('output');
var firstDate = new Date("2022-11-01");
var secondDate = new Date("2022-11-07");
function getArrayOfDates(firstDate, secondDate) {
// calculate milli seconds of 1 day
var milliOf1Day = 24 * 60 * 60 * 1000;
// calculate the total milliseconds of the start and end date
let startMillis = firstDate * 1;
let lastMillis = secondDate * 1;
var dateArray = [];
// In the for-loop, on every iteration, add the total milli seconds of 1 day to current milliseconds, and create a new date
for (var currentMillis = startMillis; currentMillis < lastMillis; currentMillis += milliOf1Day) {
// pushing updated date to the array
dateArray.push(new Date(currentMillis));
}
return dateArray;
}
let dates = getArrayOfDates(firstDate, secondDate)
output.innerHTML += "The firstDate is " + firstDate + "<br/>";
output.innerHTML += "The secondDate is " + secondDate + "<br/>";
output.innerHTML += "The date array is <br/>";
// printing the date array
for (let i = 0; i < dates.length; i++) {
output.innerHTML += dates[i] + " <br/>";
}
</script>
</body>
</html>
Use momentJS library
momentJS library allows us to manipulate dates.
grammar
Users can use the momentJS library according to the following syntax to get all dates between two dates.
while (currentDate.add(1, "days").diff(lastDate) < 0) {
allDates.push(currentDate.clone().toDate());
}
In the above syntax, we use the add() and diff() methods of the momentJS library.
Example 3
In the example below, we get the start date and last date from the user. After that, we use the input date and create the date using momentJS library.
Next, we use the add() method to add a day to the current date. Additionally, we use the diff() method to get the difference between the current date and the last date.
<html>
<head>
<script src ="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.22.2/moment.min.js"></script>
<script src = "https://cdnjs.cloudflare.com/ajax/libs/momentrange/4.0.1/moment-range.js"> </script>
</head>
<body>
<h2>Using the <i> setDate() method and while loop </i> to get all dates between two dates in the array format. </h2>
<div id="output"> </div>
<button onclick="getArrayOfDates()"> Get array of Dates</button>
<script>
var output = document.getElementById('output');
function getArrayOfDates() {
let allDates = [];
let startDate = prompt("Enter start date in the MM / DD / YYYY format", "09/23/2022");
let endDate = prompt("Enter end date in the MM / DD / YYYY format ", "10/23/2022");
// create a new date from the custom input
let currentDate = moment.utc(new Date(startDate)).startOf("day");
let lastDate = moment.utc(new Date(endDate)).startOf("day");
// add one day to the current date and check the difference between the current date and the last date
while (currentDate.add(1, "days").diff(lastDate) < 0) {
allDates.push(currentDate.clone().toDate());
}
allDates.push(currentDate.clone().toDate());
output.innerHTML += "The currentDate is " + currentDate + "<br/>";
output.innerHTML += "The lastDate is " + lastDate + "<br/>";
output.innerHTML += "The date array is <br/>";
for (let i = 0; i < allDates.length; i++) {
output.innerHTML += allDates[i] + " <br/>";
}
}
</script>
</body>
</html>
The above is the detailed content of How to store all dates existing between given two dates in an array in JavaScript?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1666
14
1425
52
1327
25
1273
29
1252
24
JavaScript Engines: Comparing Implementations
Apr 13, 2025 am 12:05 AM
Different JavaScript engines have different effects when parsing and executing JavaScript code, because the implementation principles and optimization strategies of each engine differ. 1. Lexical analysis: convert source code into lexical unit. 2. Grammar analysis: Generate an abstract syntax tree. 3. Optimization and compilation: Generate machine code through the JIT compiler. 4. Execute: Run the machine code. V8 engine optimizes through instant compilation and hidden class, SpiderMonkey uses a type inference system, resulting in different performance performance on the same code.
Python vs. JavaScript: The Learning Curve and Ease of Use
Apr 16, 2025 am 12:12 AM
Python is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.
From C/C to JavaScript: How It All Works
Apr 14, 2025 am 12:05 AM
The shift from C/C to JavaScript requires adapting to dynamic typing, garbage collection and asynchronous programming. 1) C/C is a statically typed language that requires manual memory management, while JavaScript is dynamically typed and garbage collection is automatically processed. 2) C/C needs to be compiled into machine code, while JavaScript is an interpreted language. 3) JavaScript introduces concepts such as closures, prototype chains and Promise, which enhances flexibility and asynchronous programming capabilities.
JavaScript and the Web: Core Functionality and Use Cases
Apr 18, 2025 am 12:19 AM
The main uses of JavaScript in web development include client interaction, form verification and asynchronous communication. 1) Dynamic content update and user interaction through DOM operations; 2) Client verification is carried out before the user submits data to improve the user experience; 3) Refreshless communication with the server is achieved through AJAX technology.
JavaScript in Action: Real-World Examples and Projects
Apr 19, 2025 am 12:13 AM
JavaScript's application in the real world includes front-end and back-end development. 1) Display front-end applications by building a TODO list application, involving DOM operations and event processing. 2) Build RESTfulAPI through Node.js and Express to demonstrate back-end applications.
Understanding the JavaScript Engine: Implementation Details
Apr 17, 2025 am 12:05 AM
Understanding how JavaScript engine works internally is important to developers because it helps write more efficient code and understand performance bottlenecks and optimization strategies. 1) The engine's workflow includes three stages: parsing, compiling and execution; 2) During the execution process, the engine will perform dynamic optimization, such as inline cache and hidden classes; 3) Best practices include avoiding global variables, optimizing loops, using const and lets, and avoiding excessive use of closures.
Python vs. JavaScript: Community, Libraries, and Resources
Apr 15, 2025 am 12:16 AM
Python and JavaScript have their own advantages and disadvantages in terms of community, libraries and resources. 1) The Python community is friendly and suitable for beginners, but the front-end development resources are not as rich as JavaScript. 2) Python is powerful in data science and machine learning libraries, while JavaScript is better in front-end development libraries and frameworks. 3) Both have rich learning resources, but Python is suitable for starting with official documents, while JavaScript is better with MDNWebDocs. The choice should be based on project needs and personal interests.
Python vs. JavaScript: Development Environments and Tools
Apr 26, 2025 am 12:09 AM
Both Python and JavaScript's choices in development environments are important. 1) Python's development environment includes PyCharm, JupyterNotebook and Anaconda, which are suitable for data science and rapid prototyping. 2) The development environment of JavaScript includes Node.js, VSCode and Webpack, which are suitable for front-end and back-end development. Choosing the right tools according to project needs can improve development efficiency and project success rate.
