javascript 使用 JS - jQuery，如何取消转义 html 并将`quotes & <>` 放回字符串中？

Using JS - jQuery, how can I unescape html and put `quotes & <>` back in the string?

提问by Squirrl

Essentially I want to undo the escapeHTML() function I found below, after I used it.

本质上，我想在使用它之后撤消我在下面找到的 escapeHTML() 函数。

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

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


var a = escapeHtml("<div> yo & yo squirrl's </div>");
var b = unescapeHtml(a);
console.log(a);
console.log(b);//should log "<div> yo & yo squirrl's </div>"

I tried the obvious but no deal. http://jsfiddle.net/ej6bX/

我尝试了显而易见的但没有交易。http://jsfiddle.net/ej6bX/

回答by Arun P Johny

You need to use

你需要使用

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

---

---

A more clear approach using jQuery could be

使用 jQuery 的更清晰的方法可能是

function escapeHtml(unsafe) {
    return $('<div />').text(unsafe).html()
}

function unescapeHtml(safe) {
    return $('<div />').html(safe).text();
}

Demo: Fiddle

演示：小提琴

回答by Pranav C Balan

The second parameter of replace()should be string not regular expression

的第二个参数replace()应该是字符串而不是正则表达式

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

Fiddle

Fiddle