Javascript

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JavaScript is the programming language of HTML and the Web. JavaScript is easy to learn. Web pages are not the only place where JavaScript is used. Many desktop and server programs use JavaScript. Node.js is the best known. Some databases, like MongoDB and CouchDB, also use JavaScript as their programming language. JavaScript was invented by Brendan Eich in 1995, and became an ECMA standard in 1997. ECMA-262 is the official name of the standard. ECMAScript is the official name of the language.

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Latest Asked Question

Q : Convert html to pdf in javascript

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Q : how to check if function exists in javascript

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Q : How to restore input field data after refresh page in javascript

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Q : Number Validation in javascript

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Q : How do I remove a particular element from an array in JavaScript?

A : this your solution use indexOf() and array.splice() method in javascript. var array = [2, 5, 9]; console.log(array); var index = array.indexOf(5); if (index > -1) { array.splice(index, 1); } // array = [2, 9] alert(array);

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Q : sum array in javascript

A : You can solve your query using reduce() method in javascript Use the JavaScript reduce() Method var array1 = [95, 782, 523, 474]; var array2 = [55, 12, 50]; // Getting sum of numbers of aray1. var sum1 = array. reduce(function(a, b){ return a + b; }, 0); // Getting sum of numbers of aray2. var sum2 = array2. reduce(function(a, b){ return a + b; }, 0); console. log(sum1 + sum2); // Prints: 1991.

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Q : merge 2 arrays of objects using JavaScript

A : hi you can try var x = [{"hello":"1", "hello2":"456"}]; var y = [{"hi1":"852", "hi2":"9632", "hi3":"75391}]; Array.prototype.push.apply(x,y); console.log(x); //x will print combined array; workable and tested.

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Q : How to get current date in Javascript?

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Q : How to give alert on click button when Minimum checkbox is not checked in JavaScript?

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Q : Click on html element in JavaScript

A : Hi you can use this. document.querySelector('#click').click();TV Tested.

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Q : Change Browser URL without reloading refreshing page using HTML5 in JavaScript and JQuery

A : function ChangeUrl(page, url) { if (typeof (history.pushState) != "undefined") { var obj = {Page: page, Url: url}; history.pushState(obj, obj.Page, obj.Url); } else { alert("Browser does not support HTML5."); } } ChangeUrl('Page1', ''loading.php');

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Q : increasing count of number every second in javascript

A : Hey you can use it also. setTimeout(start, 1000); var i = 1; var num = document.getElementById("number"); function start() { setInterval(increase, 1000); } function increase() { if (i < 100) { i++; num.innerText = i; } }

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Q : how to search live data from div using javascript

A : hi using jquery fast $(document).ready(function(){ $("#myInput").on("keyup", function() { var value = $(this).val().toLowerCase(); $("#myTable tr").filter(function() { $(this).toggle($(this).text().toLowerCase().indexOf(value) > -1) }); }); });

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Q : how to create canvas in javascript

A : use the following code to create canvas object in html using javascript <canvas id="myCanvas" width="200" height="100" style="border:1px solid #c3c3c3;"></canvas> javascript is here:- var canvas = document.getElementById("myCanvas"); var ctx = canvas.getContext("2d"); ctx.fillStyle = "#FF0000"; ctx.fillRect(0,0,150,75);

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Q : JavaScript String match() Method

A : var str = "High thinking simple living"; var res = str.match(/ing/g); console.log(res); Output: ing,ing

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Q : Window confirm Method in javascript

A : <script> function confirmAlert(){ var x = confirm("Are you sure to submit this form."); if(x){ /* write your code here that you want to perform*/ } } </script>

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Q : how to disable button using javascript.

A : Use follow code in javascript to disable button document.getElementById("submitnewquestion").disabled = true; if you want enable button use document.getElementById("submitnewquestion").disabled = false; Note : button type="submit"

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Q : show image in html after browser using javascript

A : Here is the code. <body> <input type='file' onchange="showImg(this);" /> <img id="blah" src="#" alt="your image" /> </body> <script> function showImg(input) { if (input.files && input.files[0]) { var reader = new FileReader(); reader.onload = function (e) { $('#blah') .attr('src', e.target.result) .width(150) .height(200); }; reader.readAsDataURL(input.files[0]); } } </script>

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