console.log(startsWithSpace(' hello ')) //true console.log(startsWithSpace('hello'))// false console.log(startsWithSpace('hello '))// false Related Topics: JavaScript – Detect if a string contains any space How to check if String contains only spaces in JavaScript Check if String starts...
console.log(hasSpace(sentence)); console.log(hasSpace(sentence1)); Output true false Summary The stringindexOfmethod and regular expression method are great and excellent approaches to check if string contains spaces, and a good understanding of how strings work and regular expressions are needed....
Check white space is available in a string using javascript checkBox checked become unchecked after sorting or paging checkbox list validation to check multiple(3) item has been checked checkbox: how to checked only one checkbox? Checking if an object exists? VB.NET Checking if datatable column ...
Now to check whether a given variable is a string or not, we'll use a JavaScript operator calledtypeof. Syntax: typeof variable; This operator returns the data type of the variable specified after it. If the variable is of string data type, it will return a string. Alternatively, it ca...
trim() === ''){ document.write('String is empty'); } Following is the output of the above program −String is empty So, we have seen how to check the empty string in JavaScript using the length property and trim() method. Print Page Previous Next ...
In JavaScript, includes() method checks whether a sub-string or a character is present in the string or not. It will return output in terms of true and false. This method is case sensitive, which means that it will consider uppercase and lowercase differently....
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Write a JavaScript function that returns true if a string is blank and false if it contains any non-space characters. Write a JavaScript function that uses regular expressions to test for blank strings. Write a JavaScript function that validates a string input and returns a boolean indicating its...
Here, since our first-string variablestr_1contains all the uppercase valuesAB% ^M. Therefore, it has printed all the characters are in uppercase. Note that there is a space character inside this string as well. Inside the second string variablestr_2, from all the charactersIO(|12c, we ...