Use thelengthProperty to Check if the String Is Empty in JavaScript Here is another way to check JavaScript empty string. If the length is zero, then we know that the string is empty. Example: letstr1='Hello world!';letstr2='';letstr3=4;console.log(str1.length===0)console.log(str...
To capitalize the first letter of a string in JavaScript:Use the charAt() function to isolate and uppercase the first character from the left of the string. Use the slice() method to slice the string leaving the first character. Concatenate the output of both functions to form a capitalized...
Efficiently adding elements to the beginning of an array in JavaScript is important for optimizing code performance, especially within the context of aJavaScript framework. This blog looks into various techniques, including those offered by popular JS frameworks, and looks at their efficiency in achievi...
To prevent the default installation experience, all plug-in instances except the first one are given a non-empty alt property value. The alt value that is used specifies an HTML comment so that nothing is displayed. In this example, each Silverlight plug-in is given a unique id and user...
time projects, the “JSON.parse()” method is the most commonly and efficiently used method. It is important to note that it can throw an error if the string passed to it is not valid JSON. In this write-up, we demonstrated JavaScript’s methods for converting the string into an object...
We can get the last character of a string in javascript using the conventional methods too. As javascript considers a string object as an array of characters, we can retrieve the last element of that array using the string[length - 1] syntax. It is similar to dealing with a character arra...
Now we know the basic elements of working with API in JavaScript, and we can create a step-by-step guide to creating a JavaScript app with API integration: 1. Get an API key An API key is usually aunique string of letters and numbers. In order to start working with most APIs, you ...
For many programs in JavaScript, code is executed as the developer writes it—line by line. This is calledsynchronous execution, because the lines are executed one after the other, in the order they were written. However, not every instruction you give to the computer needs to be attended ...
In the JavaScript function, we get the "first_name" HTML element, identify if there is input and return true or false depending on the input. If the value is equal to a blank string, then we know that the user entered no value. Otherwise, the user entered a value and we can continue...
JavaScript // Define our Mongoose SchemavarpersonSchema = mongoose.Schema({firstName:String,lastName:String,status:String});varPerson = mongoose.model('Person', personSchema); There’s a variety of things you can do with the fields in the personSchema, but for starters, let’s keep it simp...