"Go" encodeURI and decodeURI methods

Why do I need to call encodeURI two times to solve the garbled problem

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Note the difference between the encodeURIComponent () function and the encodeURI () function, which assumes that its arguments are part of a URI (such as a protocol, hostname, path, or query string). Therefore, the encodeURIComponent () function escapes punctuation marks that are used to separate the various portions of the URI.

One, encodeURI ()//escape characters in a URI

Syntax: encodeURI (URI)//This is often used to solve Chinese garbled problems when coding different AJAX requests.

        var str1 = "Hello JavaScript";        var str2 = encodeURI (str1);        document.write (STR2);   

Second, decodeURI ()//decode the characters in a URI

Syntax: decodeURI (URI)

        var str1 = "Hello JavaScript";        var str2 = encodeURI (str1);        document.write (STR2);   Output%e4%bd%a0%e5%a5%bdjavascript        var str3 = decodeURI (str2);        document.write ("<br/>" + str3)  //output    Hello JavaScript

Three, encodeURIComponent ()//Escape the characters in the URI component

        var str1 = "Hello JavaScript";        var str2 = encodeURIComponent (str1);        document.write (STR2);   Output%e4%bd%a0%e5%a5%bdjavascript

Iv. decodeuricomponent ()//decode a character in a URI component

        var str1 = "Hello JavaScript";        var str2 = encodeURIComponent (str1);        document.write (STR2);   Output%e4%bd%a0%e5%a5%bdjavascript        var str3 = decodeuricomponent (str2);        document.write ("<br/>" + str3)  //output    Hello JavaScript

V, Escape ()//Encode a string

Syntax: Escape (value);

        var str = "JavaScript hello";        var str1 = Escape (str);        document.write (STR1); javascript%20%u4f60%u597d

VI, Unecape ()//decode a string encoded by the escape () function

        Window.onload = function () {            var str = "JavaScript hello";            var str1 = Escape (str);            document.write (STR1); javascript%20%u4f60%u597d            var str2 = unescape (str1);            alert (STR2); Popup JavaScript Hello        }

"Go" encodeURI and decodeURI methods