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.
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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
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