JavaScript: Escape a HTML string
JavaScript String: Exercise-19 with Solution
Write a JavaScript function to escape a HTML string.
Test Data:
console.log(escape_HTML('<a href="javascript-string-exercise-17.php" target="_blank">'));
Output:
<a href="javascript-string-exercise-17.php" target="_blank">
Sample Solution:-
HTML Code:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Write a JavaScript function to escape a HTML string.</title>
</head>
<body>
</body>
</html>
JavaScript Code:
function escape_HTML(html_str) {
'use strict';
return html_str.replace(/[&<>"]/g, function (tag) {
var chars_to_replace = {
'&': '&',
'<': '<',
'>': '>',
'"': '"'
};
return chars_to_replace[tag] || tag;
});
}
console.log(escape_HTML('<a href="javascript-string-exercise-17.php" target="_blank">'));
Sample Output:
<a href="javascript-string-exercise-17.php" target="_blank">
Flowchart:

Live Demo:
See the Pen JavaScript Escape a HTML string - string-ex-19 by w3resource (@w3resource) on CodePen.
Improve this sample solution and post your code through Disqus
Previous: Write a JavaScript function to count the occurrence of a substring in a string.
Next: Write a JavaScript function that can pad (left, right) a string to get to a determined length.
What is the difficulty level of this exercise?
Test your Programming skills with w3resource's quiz.
JavaScript: Tips of the Day
Returns true if the given number is a power of 2, false otherwise
Example:
const tips_isPowerOfTwo = n => !!n && (n & (n - 1)) == 0; console.log(tips_isPowerOfTwo(0)); console.log(tips_isPowerOfTwo(4)); console.log(tips_isPowerOfTwo(16));
Output:
false true true
- New Content published on w3resource:
- HTML-CSS Practical: Exercises, Practice, Solution
- Java Regular Expression: Exercises, Practice, Solution
- Scala Programming Exercises, Practice, Solution
- Python Itertools exercises
- Python Numpy exercises
- Python GeoPy Package exercises
- Python Pandas exercises
- Python nltk exercises
- Python BeautifulSoup exercises
- Form Template
- Composer - PHP Package Manager
- PHPUnit - PHP Testing
- Laravel - PHP Framework
- Angular - JavaScript Framework
- Vue - JavaScript Framework
- Jest - JavaScript Testing Framework