Solution Review: Check Parentheses

function balancedParentheses(str) {
    let stack = [];
    let map = {
        '(': ')',
        '[': ']',
        '{': '}'
    }
    for (let i = 0; i < str.length; i++) {
        // If character is an opening brace add it to a stack
        if (str[i] === '(' || str[i] === '{' || str[i] === '[' ) {
            stack.push(str[i]);
        }
        //if closing brace, pop from stack
        else {
            let lastEle = stack.pop();
            //Return false if the element popped doesn’t match the corresponding closing brace in the map 
            if (str[i] !== map[lastEle]) {return false};
        }
    }
    //if stack not empty at end, return false
    if (stack.length !== 0) {return false};
    return true;
}
console.log(balancedParentheses("{[]()}" ));
console.log(balancedParentheses("{[(])}"));
console.log(balancedParentheses("{[}"));