unicode - How to remove emoji code using javascript?

Question

How do I remove emoji code using JavaScript? I thought I had taken care of it using the code below, but I still have characters like ??.

function removeInvalidChars() {
    return this.replace(/[uE000-uF8FF]/g, '');
}

Answer 1

For me none of the answers completely removed all emojis so I had to do some work myself and this is what i got :

text.replace(/([u2700-u27BF]|[uE000-uF8FF]|uD83C[uDC00-uDFFF]|uD83D[uDC00-uDFFF]|[u2011-u26FF]|uD83E[uDD10-uDDFF])/g, '');

Also, it should take into account that if one inserting the string later to the database, replacing with empty string could expose security issue. instead replace with the replacement character U+FFFD, see : http://www.unicode.org/reports/tr36/#Deletion_of_Noncharacters