有没有原生方法可以在javascript中使用HTML转义字符实体？

Question

The Unicode character 𠮵 given by point 134069 , has the HTML escape 𠮵

Is there a (preferably native) way to get the HTML escapes for character entities from Javascript?

Answer 1

You can get both the point and hex values of the char like this:

var codePoint = '𠮵'.codePointAt(0); //codePoint = 134069
var hexValue = '𠮵'.codePointAt(0).toString(16); //hexValue = 20bb5
var htmlEscape = '&#x' + hexValue + ';'; //htmlEscape = 𠮵

Here is a working example:

 $('#doIt').click(function() { $('#outputHex').html($('#inputText').val().codePointAt(0).toString(16)); $('#outputString').html('&#x' + $('#inputText').val().codePointAt(0).toString(16) + ';'); $('#outputChar').html('&#x' + $('#inputText').val().codePointAt(0).toString(16) + ';'); }); 

 code { display: block; padding: 4px; background-color: #EFEFEF; } 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <textarea id="inputText"></textarea> <button id="doIt">do it</button> <h3>result</h3> <code id="outputHex"></code> <code id="outputString"></code> <code id="outputChar"></code> 

One more thing, codePointAt is an ES6 function and isn't supported in older browsers. In case the browser blocks the code from running here: JSFiddle Example

Answer 2

Here is a function that converts all non-ASCII7 characters, and < , > , & to HTML entities:

 function htmlEntities(s) { return Array.from(s).map(function (c) { return c.codePointAt(0) < 128 && '<&>'.indexOf(c) == -1 ? c : '&#x' + c.codePointAt(0).toString(16) + ';'; }).join(''); } var s = 'This is \\u{20BB5}, a special character & encoded in HTML.'; document.body.innerHTML = htmlEntities(s); 

Be aware that in Javascript strings, extended unicode characters are counted as two characters (for example in length ). The ES6 constructs like Array.from , [...s] make sure you get the right chunks.