There are many ways to extract numbers from a string in JavaScript. Here’s the function we use: function ExtractOnlyNumbersFromString(txt) { var numbers = txt.match(/\d/g); return (numbers) ? numbers.join(“”) : “”; } ExtractOnlyNumbersFromString(“a 1 b 2…
var IS_SESSION_STORAGE_SUPPORTED; try { if (window.sessionStorage) { IS_SESSION_STORAGE_SUPPORTED = true; } else { IS_SESSION_STORAGE_SUPPORTED = false; } } catch (e) { IS_SESSION_STORAGE_SUPPORTED = false; } if (console) console.log(IS_SESSION_STORAGE_SUPPORTED);
Here is a small function to remove empty lines from a string without the need for regular expressions. function delBlankLines(myString) { var stringArray = myString.split(‘\n’); var temp = [""]; var x = 0; for (var…
Small function in pure Javascript to check if a string is an integer or not. function isInteger(value) { var intRegex = /^\d+$/; return intRegex.test(value); } isInteger(5); // true isInteger(undefined); // false isInteger(“1”); // true isInteger(“1.3”);…
$.urlParam = function (name) { var results = new RegExp(‘[\?&]’ + name + ‘=([^&#]*)’) .exec(window.location.href); if (results == null) { return 0; } return results[1] || 0; } console.log($.urlParam(‘dotmaui’)); //cool
If you are not interested in support for old browsers, the best way to browse an array of json is: var dotArrayJSON = [ {“label”: 1}, {“label”: 2}, {“label”: 3}, {“label”: 4} ]; dotArrayJSON.forEach(loopThrough); function…
Javascript is unable to get the client IP, however, it is possible to retrieve it by making an ajax call to a service or web page that shows it to us. dotmaui.com offers a free…
How to upload a text file in a textarea with Javascript. This script is used in dotmaui.com to upload files completely client-side, to respect the privacy of users. document.forms[‘myForm’].elements[‘myFile’].onchange = function (evt) { if (!window.FileReader)…
window.onpageshow = function(evt) { if (evt.persisted) { document.body.style.display = “none”; location.reload(); } };
function IsJson(myString) { try { JSON.parse(myString); } catch (err) { return false; } return true; }