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JavaScript: Create a case-insensitive search

JavaScript String: Exercise-38 with Solution

Write a JavaScript function to create a case-insensitive search.

Test Data:
console.log(case_insensitive_search('JavaScript Exercises', 'exercises'));
"Matched"
console.log(case_insensitive_search('JavaScript Exercises', 'Exercises'));
"Matched"
console.log(case_insensitive_search('JavaScript Exercises', 'Exercisess'));
"Not Matched"

Pictorial Presentation:

JavaScript:  Create a case-insensitive search

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript function to create a case-insensitive search.</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function case_insensitive_search(str, search_str)
  {
    var result= str.search(new RegExp(search_str, "i"));
  
    if (result>0)
    return 'Matched';
    else
    return 'Not Matched';  
   }

console.log(case_insensitive_search('JavaScript Exercises', 'exercises'));

console.log(case_insensitive_search('JavaScript Exercises', 'Exercises'));

console.log(case_insensitive_search('JavaScript Exercises', 'Exercisess'));

Sample Output:

Matched
Matched
Not Matched

Flowchart:

Flowchart: JavaScript: Create a case-insensitive search

Live Demo:

See the Pen JavaScript Create a case-insensitive search-string-ex-38 by w3resource (@w3resource) on CodePen.


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Previous: Write a JavaScript function to test case insensitive (except special Unicode characters) string comparison.
Next: Write a JavaScript function to uncapitalize  the first character of a string.

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JavaScript: Tips of the Day

Tagged template literals

function getPersonInfo(one, two, three) {
  console.log(one);
  console.log(two);
  console.log(three);
}

const person = 'Lydia';
const age = 21;

getPersonInfo`${person} is ${age} years old`;

If you use tagged template literals, the value of the first argument is always an array of the string values. The remaining arguments get the values of the passed expressions!

Ref: https://bit.ly/323Y0P6