//Try it! In HTML they are undefined, and in XHTML they are completely invalid. A protip by gohan about escape, html, and javascript. The exact answer depends on the context. È preferibile usare le funzioni encodeURI() o encodeURIComponent(). Escapes or unescapes a JavaScript string removing traces of offending characters that could prevent interpretation. The following characters are reserved in HTML and must be replaced with their corresponding HTML entities: In general, these characters must not be present (HTML 5.2 §3.2.4.2.5):Text nodes and attribute values must consist of Unicode characters, must not contain U+0000 characters, must not contain permanently undefined Unicode characters (noncharacters), and must not contain control characters other than space characters. The following characters are reserved in JavaScript and must be properly escaped to be used in strings: Horizontal Tab is replaced with \t; Vertical Tab is replaced with \v JavaScript String Escape / Unescape. HTML Escape / Unescape Escapes or unescapes an HTML file removing traces of offending characters that could be wrongfully interpreted as markup. HTML escape character lists often include characters between 128 and 159 – the problem is that these are Microsoft specific, and are reserved for control characters in the standard Internet character sets. example and " != ' – mavili Jan 19 '13 at 11:38 JavaScript Escape Characters An escape character enables you to output characters you wouldn't normally be able to, usually because the browser will interpret it differently to what you intended. Here is a list of valid HTML/XHTML escape characters you should use. for example "yes" will return "yes" – user1814734 Jan 19 '13 at 11:37 you don't need to escape it as your main string quotation starts with ' and until it encounters another ' the string is valid. The escape function is a property of the global object. To display an accented character in a JavaScript alert message or a confirm dialog box, use the hexadecimal code of the character, for example: alert('\xC5ngstr\xF6m is a unit of length.') La funzione escape(), deprecata, crea una nuova stringa nella quale alcuni caratteri vengono sostituiti con una sequenza di escape esadecimale. Special characters are encoded with the exception of: @*_+-./ The hexadecimal form for characters, whose code unit value is 0xFF or less, is a two-digit escape sequence: %xx. Examples Using escape Actually " is use for html. Below mixin was inspired by Ben's post and the Mustache.js implementation for sanitizing HTML from user input /** Mixin to extend the String type with a method to escape unsafe characters * for use in HTML. Ben Vinegar's You are probably misusing DOM text methods convinced me not to use DOM fragments to escape HTML. For characters with a greater code unit, the four-digit format %uxxxx is used. 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