JS url 加密 解密

4，JavaScript中escape/unescape做HTML的escape，encodeURI/decodeURI做URL的encode/decode

var a = "<span>afd adf &&& <<< >>></span>"
var b = escape(a)
  => "%3Cspan%3Eafd%20adf%20%26%26%26%20%3C%3C%3C%20%3E%3E%3E%3C/span%3E"
var c = unescape(b)
  => "<span>afd adf &&& <<< >>></span>"

var a = "http://www.test.com/haha hehe/"
var b = encodeURI(a)
  => "http://www.test.com/haha%20hehe/"
var c = decodeURI(b)
  => "http://www.test.com/haha hehe/"

var a = "<span>afd adf &&& <<< >>></span>"
var b = escape(a)
  => "%3Cspan%3Eafd%20adf%20%26%26%26%20%3C%3C%3C%20%3E%3E%3E%3C/span%3E"
var c = unescape(b)
  => "<span>afd adf &&& <<< >>></span>"

var a = "http://www.test.com/haha hehe/"
var b = encodeURI(a)
  => "http://www.test.com/haha%20hehe/"
var c = decodeURI(b)
  => "http://www.test.com/haha hehe/"

5，jQuery中的text(str)和html(str)
jQuery中text(str)方法给某个HTML Element设置文本内容，其中的文本如果包括HTML Tag或者<script>标签都会忽略而当作文本来看待
jQuery中html(str)方法给某个HTML Element设置html内容，其中的内容如果包括HTML Tag或者<script>标签则都会当作正常标签来执行

6，JavaScript实现h和uh方法来escape/unescape HTML
该方法用于JavaScript拼接HTML片段时防止&、<、>、"相关的问题

function escapeHTML(str) {
  str = String(str).replace(/&/g, '&').
    replace(/>/g, '>').
    replace(/</g, '&lt;').
    replace(/"/g, '&quot;');
  return str;
}
function unescapeHTML(str) {
  str = String(str).replace(/&gt;/g, '>').
    replace(/&lt;/g, '<').
    replace(/&quot;/g, '"').
    replace(/&amp;/g, '&');
  return str;
}
h = escapeHTML;
uh = unescapeHTML;