HTML

html escape characters

Escapes or unescapes an HTML file removing traces of offending characters that could be wrongfully interpreted as markup.

The following characters are reserved in HTML and must be replaced with their corresponding HTML entities:

" is replaced with "
& is replaced with &
< is replaced with &lt;
> is replaced with &gt;

how to escape in html

Escaping HTML characters in a string means replacing the:
1.less than symbol (<) with &lt;
2.greater than symbol (>) with &gt;
3.double quotes (") with &quot;
4.single quote (') with &#39;
5.ampersand (&) with &amp;
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function escape(htmlStr) {
   return htmlStr.replace(/&/g, "&amp;")
         .replace(/</g, "&lt;")
         .replace(/>/g, "&gt;")
         .replace(/"/g, "&quot;")
         .replace(/'/g, "&#39;");        

}

console.log(escape("<script>alert('hi')</script>"));