Learn how to get a random number without using Math.rand() The Crypto.getRandomValues() method lets you get cryptographically strong random values. Syntax: getRandomValues(typedArray) Argument: typedArray → Is an integer-based TypedArray, which can be an Int8Array or an Uint8Array or an Int16Array or a Uint16Array or an Int32Array or a Uint32Array. All elements in the array are …
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Learn how to select text, focus and clear the text in input box in Javascript. input.value = “” → this will make the input value to empty string. input.focus() → this method will set focus on the input box. input.select() → this will select the text in the input box. If you find this helpful …
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Learn how to remove the duplicate values in the array Simple Way is using Set (which only contains unique value). var array = [1,2,3,4,1,2,3]; var unique = [… new Set(array)] ; //or var unique = Array.from (new Set(array) ); Another way is var elements = [1,2,3,4,1,2,3]; var uniqueArray = elements.filter(function(element, currentIndex) { return elements.indexOf(element) == …
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Learn how to delete all the nodes inside a div or any node in Javascript. You can do it in three ways 1 . Set the node innerHTML as empty-string(“”). var node = document.getElementById(‘parent’); node.innerHTML = “”; This method removes all the text and nodes inside the parent node. If you need to delete only the …
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There are some things we don’t know about how the ! operator works in Javascript. Basics The ! is a logical operator that will convert a value to its opposite boolean. Since JavaScript will coerce values, it will “convert” a value to its truthy/falsey form and return the opposite boolean value. When we perform the ! operation on …
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Learn how to get the maximum of numbers. max function in the Math object can be used to find the maximum of multiple numbers and array. Math.max(1,2); //2 Math.max(1,2,3); //3 If any one of the argument passed cannot be converted to number then it returns NaN Math.max(‘1’, 0); //1 Math.max(‘one’, 1); // NaN Math.max(1, 2, …
Learn how to convert a multi-dimensional array into single dimension array in javascript We can flatten an array to single dimension array using Array.flat(depth) method. But if we have multi-dimensional array then we need to find the depth of the Array, instead of finding depth we can solve the problem in two ways we can …
Learn how to remove space in string. If you want to remove all the space in the string then , you can use replace method var name = “Javascript jeep “; name.replace(/s/g,”); // Javascriptjeep s –> spaceg –> replace globally We can also replace the space with ‘-‘ var name = “Javascript jeep “; name.replace(/s/g,’-‘); // …
Learn about how to parse boolean in Javascript. Creating a boolean value using Boolean constructor var b = new Boolean(); b is an object which have the value false in it. But the problem here is most of the beginner think as we can use directly in if , but it results to misunderstanding if(b) { …
Convert the 24 hours format time to 12 hours formatted time. You can get the time by , var dt = new Date(); var hours = dt.getHours(); // gives the value in 24 hours format var minutes = dt.getMinutes() ; var finalTime = “Time – ” + hours + “:” + minutes; finalTime // final time …
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