如何在JavaScript中将一个表情符号字符转换为Unicode代码点编号？

''.charCodeAt(0);  

这将返回Unicode 55357，但如何从中获取1f600

添加了脚本以在浏览器端进行转换

function emojiUnicode (emoji) {
    var comp;
    if (emoji.length === 1) {
        comp = emoji.charCodeAt(0);
    }
    comp = (
        (emoji.charCodeAt(0) - 0xD800) * 0x400
      + (emoji.charCodeAt(1) - 0xDC00) + 0x10000
    );
    if (comp <0) {
        comp = emoji.charCodeAt(0);
    }
    return comp.toString("16");
};
emojiUnicode(""); # result "1f600"

感谢https://www.npmjs.com/package/emoji-unicode

这是我用的：

const toUni = function (str) {
  if (str.length <4)
    return str.codePointAt(0).toString(16);
  return str.codePointAt(0).toString(16) + '-' + str.codePointAt(2).toString(16);
};