In this article, you will learn how to replace all occurrences of a word in Javascript. Let’s say you have a string variable named ‘a’ with value “How much wood would a woodchuck chuck if a woodchuck could chuck wood?”. In order to replace all occurrences of a word in a string, you can use […]
In this article, you will learn how to get the current date in Javascript. Let’s say you have an empty variable named ‘a’. In order to get the current date, you can use the new keyword and Date object. Note: The new keyword functions by creating an instance of an object. The Date object represents […]
In this article, you will learn how to set default value if null in Javascript. Let’s say you have a null variable named ‘a’ with the value null. In order to set a default value, you can use the nullish coalescing operator ??. Note: The nullish coalescing operator ?? is a logical operator that functions […]
In this article, you will learn how to concatenate arrays in Javascript. Let’s say you have two arrays and you want to combine them into a single array. In order to concatenate arrays, you can use the concat() method. Note: The concat() method functions by joining two or more arrays together.
In this article, you will learn how to truncate a string in Javascript. Let’s say you have a string variable named ‘a’ with value “I love code-source.tempurl.host!”. In order to truncate a string, you can use the substring() method. In this example, you will be extracting the first 6 characters from ‘a’. Note: The substring() […]
In this article, you will learn how to reverse a string in Javascript. Let’s say you have a string variable named ‘a’ with value “codesource”. In order to reverse the string variable, you can use the split(), reverse() and join() methods. Note: The split() method functions by splitting a string into an array of substrings. […]
In this article, you will learn how to convert a positive number into a negative number in Javascript. Let’s say you have a number variable called ‘a’ with value 123. In order to convert a positive number into a negative number, you can use the unary negation operator -. Note: The unary negation operator – […]
In this article, you will learn how to convert string to array in Javascript. Let’s say you have a string variable named ‘a’ with value “codesource”. In order to convert a string to an array, you can use the split() method. Note: The split() method functions by splitting the string into an array of characters.
In this article, you will learn how to convert any values into a boolean in Javascript. Let’s say you have 4 types of variables. In order to convert any values into a boolean, you can use the Boolean() method. Note: The Boolean method functions by converting empty strings and the number zero (0) to false, […]
In this article, you will learn how to Check If A Value Is Not A Number in Javascript. Let’s say you have 5 types of variables. In order to check if a variable’s value is a number or not, you can use the isNaN() method. Note: The word NaN stands for Not A Number. The […]
In this article, you will learn how to Compare Dates in Javascript. Let’s say you have two dates: 14 / 2 / 2020 and 14 / 2 / 2021. In order to compare dates, you can use the getTime() method and a strict equality comparison ===. Note: The getTime method functions by returning the number […]
In this article, you will learn How to Capitalize Strings in JavaScript. Let’s say you have a string variable named ‘a’ with the value “codesource”. In order to capitalise the value of a, you can use the toUpperCase() method. Note: The toUpperCase() method functions by converting all alphabetical characters in a string to uppercase letters.
In JavaScript to filter multiple values in an Array, you can use filter() array function. JavaScript filter multiple values in an Array consider the example below: In the above code, we can filter an array of objects by testing whether the properties match a certain set of criteria. We can also use template object for […]
If Javascript try if document.body.innerhtml is not working for you. The main reason for this error can be getting Aside from overwriting page HTML with a single value each iteration. When you replace the entire page HTML and break its javascript events such as click/hover handlers and many others attached via addEventListener or .on properties. Also, […]
In this article, you will learn to create a Custom Class in Javascript Using the Constructor Pattern. Constructor Pattern can also help you understand how JavaScript classes really work. Consider the following example to create a Custom Class in Javascript Using the Constructor Pattern. In the code snippet above first, you write a constructor function […]
