如何检查字符串是否等于unicode字符？

Question

I'm working on an add-on for Firefox that will convert user selected temperatures. Basically it loops through each character of the user's selection and determines whether it is a number, negative or decimal using if statements. Once it locates the degree symbol, I want the program to stop looping through the characters and save the number that it has pulled from the user selection.

However, since the degree symbol is a unicode character, the if statement doesn't detect the degree symbol and evaluates the statement to false. Because I have other fail-safes in place, it doesn't infinite loop.

My statement is if (str.charAt(#) == "°") but it won't evaluate to true. My test HTML file uses both the ° unicode just pasted in and also the ° code. Neither will trigger the statement to be true.

How can I fix this?

Answer 1

Seems to work fine for me:

 var str = document.getElementById('thing').innerText; console.log(str.charAt(0) === "°"); 

 <span id="thing">&deg;</span>