backspace: function()

in js/typed.js [243:324]
45 lines of code
12 McCabe index (conditional complexity)

        backspace: function(curString, curStrPos) {
            // exit when stopped
            if (this.stop === true) {
                return;
            }

            // varying values for setTimeout during typing
            // can't be global since number changes each time loop is executed
            var humanize = Math.round(Math.random() * (100 - 30)) + this.backSpeed;
            var self = this;

            self.timeout = setTimeout(function() {

                // ----- this part is optional ----- //
                // check string array position
                // on the first string, only delete one word
                // the stopNum actually represents the amount of chars to
                // keep in the current string. In my case it's 14.
                // if (self.arrayPos == 1){
                //  self.stopNum = 14;
                // }
                //every other time, delete the whole typed string
                // else{
                //  self.stopNum = 0;
                // }

                if (self.contentType === 'html') {
                    // skip over html tags while backspacing
                    if (curString.substr(curStrPos).charAt(0) === '>') {
                        var tag = '';
                        while (curString.substr(curStrPos).charAt(0) !== '<') {
                            tag -= curString.substr(curStrPos).charAt(0);
                            curStrPos--;
                        }
                        curStrPos--;
                        tag += '<';
                    }
                }

                // ----- continue important stuff ----- //
                // replace text with base text + typed characters
                var nextString = curString.substr(0, curStrPos);
                if (self.attr) {
                    self.el.attr(self.attr, nextString);
                } else {
                    if (self.isInput) {
                        self.el.val(nextString);
                    } else if (self.contentType === 'html') {
                        self.el.html(nextString);
                    } else {
                        self.el.text(nextString);
                    }
                }

                // if the number (id of character in current string) is
                // less than the stop number, keep going
                if (curStrPos > self.stopNum) {
                    // subtract characters one by one
                    curStrPos--;
                    // loop the function
                    self.backspace(curString, curStrPos);
                }
                // if the stop number has been reached, increase
                // array position to next string
                else if (curStrPos <= self.stopNum) {
                    self.arrayPos++;

                    if (self.arrayPos === self.strings.length) {
                        self.arrayPos = 0;

                        // Shuffle sequence again
                        if(self.shuffle) self.sequence = self.shuffleArray(self.sequence);

                        self.init();
                    } else
                        self.typewrite(self.strings[self.sequence[self.arrayPos]], curStrPos);
                }

                // humanized value for typing
            }, humanize);

        }