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Can I escape HTML special chars in JavaScript?

I want to display text to HTML by a JavaScript function. How can I escape HTML special characters in JavaScript? Is there an API?

Solution

  • Here's a solution that will work in practically every web browser:

    function escapeHtml(unsafe)
{
    return unsafe
         .replace(/&/g, "&")
         .replace(/</g, "&lt;")
         .replace(/>/g, "&gt;")
         .replace(/"/g, "&quot;")
         .replace(/'/g, "&#039;");
 }

    If you only support modern web browsers (2020+), then you can use the new replaceAll function:

    const escapeHtml = (unsafe) => {
    return unsafe.replaceAll('&', '&amp;').replaceAll('<', '&lt;').replaceAll('>', '&gt;').replaceAll('"', '&quot;').replaceAll("'", '&#039;');
}