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Note − To run this example you will need to run a localhost server.Following is the code for importing and exporting a module/library in JavaScript −ExampleINDEX.html Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-size: 18px; font-weight: 500; } JavaScript Importing and Exporting Modules IMPORT Click on the above button to import module script.jsimport test from './sample.js'; document.querySelector('.Btn').addEventListener('click', ()=>{ test(); })sample.jslet resultEle = document.querySelector(".result"); export default ... Read More
The dotAll flag returns true or false depending upon if the s flag has been set in the regular expression or not.Following is the code to implement dotAll flag for regular expressions in JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-size: 20px; font-weight: 500; } dotAll flag for regular expressions CLICK HERE Click on the above button to know if s flag has been set in regex or ... Read More
The promise.finally() calls the callback function whether a promise has been fulfilled or rejected. This helps us to do something once the promise has been rejected or resolved.Following is the code for Promise.finally() in JavaScript −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-size: 20px; font-weight: 500; } Promise.finally in JavaScript CLICK HERE Click on the above button to know when the promise finishes let btnEle = ... Read More
With JavaScript, you can group s part of regular expression. This can be done by encapsulating characters in parentheses.Following is an example −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .sample, .result { font-size: 20px; font-weight: 500; } Named capture groups Regular Expressions The year in which i passed school was 2012. CLICK HERE Click on the above button to extract the year using named groups let sampleEle = ... Read More
Lookbehind allows matching a pattern only if there’re something before.Following is an example −Example Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .sample, .result { font-size: 20px; font-weight: 500; } Look behind Assertions Regular Expressions The price for 4 tables are $50 , $99 , $121 and $150. CLICK HERE Click on the above button to extract the table price using lookbehind let sampleEle = document.querySelector(".sample").innerHTML; let btnEle = document.querySelector(".btn"); let resEle = document.querySelector(".result"); const priceRegex=/(? { resEle.innerHTML = "Table price are = "+sampleEle.match(priceRegex); }); OutputThe above code will produce the following output −On clicking the ‘CLICK HERE’ button −
For this, use preventDefault() in JavaScript. Following is the JavaScript code −Example Live Demo Document Press Me to see logs Press Me to see logs in console Nothing will happen $(function(){ $("a:not([href='#'])").click(function(event){ event.preventDefault(); console.log("You have pressed me!!!!!"); }); }); To run the above program, save the file name anyName.html(index.html) and right click on the file. Select the option Open with live server in VS code editor.OutputIf you click the two links, Press Me ... Read More
The Unicode property escapes regular expressions, allow us to match characters based on their Unicode properties by using the flag u.ExampleFollowing is an example − Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .sample, .result { font-size: 20px; font-weight: 500; } Unicode Property Escapes JavaScript Regular Expressions Hello 😆😀 World 🙂😊 CLICK HERE Click on the above button to extract the emojis using regex let sampleEle = document.querySelector(".sample").innerHTML; let btnEle ... Read More
The rest operator (…) allows us to call a function with any number of arguments and then access those excess arguments as an array. The rest operator also allows us in destructuring array or objects.The spread operator (…) allows us to expand an iterable like array into its individual elements.ExampleFollowing is the code showing the rest and spread operator in JavaScript − Live Demo Document body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .sample, .result { font-size: 20px; font-weight: 500; } ... Read More
To add options to a , you need to use append(). Following is the JavaScript code −Example Live Demo Document Book TV var mySelection = new Option("Mobile", "Samsung Mobile"); $(mySelection).html("Samsung Mobile"); $("#selectCategory").append(mySelection); To run the above program, save the file name anyName.html(index.html) and right-click on the file and select the option open with live server in VS Code editor.Output
In this problem, we have to write a program that will print ‘Tutorials Point ’ without using a semicolon.We all know that to end a statement in c semicolon is necessary. And print statement will be executed when a semicolon is added at the end.So, for printing ‘Tutorials point’ without a semicolon, we will have to first learn about the printf method in c. in actually returns an integer which is the count of total number of characters that are required to be printed.Syntaxint printf(constant char *format, ...)The method can accept n number of arguments. The first will be the ... Read More