JavaScript Latest Version Updates
Blog post description.
3/10/20242 min read
1. Function to Format Number as Currency
function formatCurrency(number) {
return new Intl.NumberFormat('en-US', { style: 'currency', currency: 'USD' }).format(number);
}
This code defines a function named formatCurrency which is used to format a number into a currency format, specifically in US dollars.
Function Name: formatCurrency:
Converts a number to US dollar format.
Parameter: number:
The number you want to convert.
Key Actions:
Uses Intl.NumberFormat to format the number.
Sets the format to US dollars ('en-US', { style: 'currency', currency: 'USD' }).
Returns the formatted number as a string, like "$100.00".
2. Function to Copy Text to Clipboard
function copyToClipboard(text) {
const elem = document.createElement('textarea');
elem.value = text;
document.body.appendChild(elem);
elem.select();
document.execCommand('copy');
document.body.removeChild(elem);
}
Function Name: copyToClipboard
This function is used to copy text to the clipboard.
Parameter: text
The text you want to copy.
Creating a Text Area:
document.createElement('textarea'): Creates a new, hidden text area element on the webpage.
elem.value = text: Sets the value of this text area to the text you want to copy.
Adding to Document:
document.body.appendChild(elem): Temporarily adds the text area to the webpage so it can be used for copying.
Selecting the Text:
elem.select(): Selects (highlights) all the text in the text area.
Copying the Text:
document.execCommand('copy'): Copies the selected text to the clipboard, like pressing Ctrl+C.
Removing the Text Area:
document.body.removeChild(elem): Removes the text area from the webpage, as it's no longer needed.
function getCurrentUrl() {
return window.location.href;
}
3. Function to Get the Current URL
Function Name: getCurrentUrl
It's a function designed to give you the current webpage's URL.
What it Does:
window.location.href: This part gets the full address (URL) of the webpage you are currently on.
Return Value:
The function returns the URL as a string of text.
4. Function to Scroll to the Top of the Page
function scrollToTop() { window.scrollTo(0, 0);
}
Function Name: scrollToTop
This function is designed to quickly take you to the very top of the webpage you're viewing.
What it Does:
window.scrollTo(0, 0): This command is the key part of the function.
It tells the browser to scroll to a specific position on the page.
The numbers (0, 0) represent the coordinates at the top-left corner of the webpage.
Result:
After this function runs, you'll find yourself at the top of the webpage, no matter where you were on that page before.
5. Function to Generate a UUID (Universally Unique Identifier)
function generateUUID() {
return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
var r = Math.random() * 16 | 0, v = c === 'x' ? r : (r & 0x3 | 0x8);
return v.toString(16); });
}
Function Name: generateUUID
It's designed to generate a unique string of characters, known as a UUID (Universally Unique Identifier).
UUID Format:
The UUID format is represented by the string 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.
This format includes random numbers and letters, separated by hyphens.
Generating Random Values:
.replace(/[xy]/g, function(c) { ... }): This part replaces each 'x' and 'y' in the format with random hexadecimal values (0-9 and a-f).
For each 'x', it uses a completely random value.
For 'y', it calculates a value that makes sure the UUID follows certain standards.
Random Number Calculation:
var r = Math.random() * 16 | 0: Generates a random number for each replacement.
v = c === 'x' ? r : (r & 0x3 | 0x8): Determines the final value to replace 'x' or 'y'.
Converting to Hexadecimal:
v.toString(16): Converts the value into a hexadecimal (base 16) number.
Return Value:
The function returns a unique string in the UUID format.
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