如何在D3.js中运行一个又一个函数

我正在使用d3.js绘制几个条形图。绘制完成后，我想更改所选条形图的颜色，但总是失败。似乎同时调用了drawBars()和updateColor()。

function redraw(data){
    drawBars(data);
    updateColor();
}

如何确保在调用updateColor()之前完成drawBars()？

起初，我在drawBar的末尾添加了更新功能代码，但它不起作用。后来，我把它移到了重绘函数的末尾，它也不起作用。这是特定的代码：

function drawBar(drawData){
        var w = 1060,h = 600;
        d3.selectAll("svg").remove();
        var svg = d3.select("#chart").append("svg").attr("width",w).attr("height",h);   
        uni.forEach(function(element,index,array){
        $('.uni').css("top",function(index){
                return  (index + 1) * 18 + 28;
            });
        });
        $(".rankingheader").css("display","block");
        $("#switch input").prop("checked", false);
        starData = drawData; 
        revCountData = drawData;
        sentData = drawData;
        bizCountData = drawData;

        drawAxis(drawData);
        drawStar(starData);
        drawRev(revCountData);
        drawSent(sentData);
        drawBiz(bizCountData);
        drawLineA(starData);
        drawLineB(starData,revCountData);
        drawLineC(revCountData,sentData);
        drawLineD(sentData,bizCountData);
                    // cart is a list which stored the id selected by user
        if(cart.length > 0){
                cart.forEach(function(element,index,array){
                    d3.select("#starHoverLine" + element).attr("visibility","visible");
                    d3.select("#starHintText" + element).attr("visibility","visible");
                    d3.select("#revHoverLine" + element).attr("visibility","visible");
                    d3.select("#revHintText" + element).attr("visibility","visible");
                    d3.select("#sentHoverLine" + element).attr("visibility","visible");
                    d3.select("#sentHintText" + element).attr("visibility","visible");
                    d3.select("#bizHoverLine" + element).attr("visibility","visible");
                    d3.select("#bizHintText" + element).attr("visibility","visible");
                    d3.select("#lineA" + element).style("stroke","red");
                    d3.select("#lineB" + element).style("stroke","red");
                    d3.select("#lineC" + element).style("stroke","red");
                    d3.select("#lineD" + element).style("stroke","red");
                    d3.select("#starBar" + element).attr("fill","red");
                    d3.select("#revBar" + element).attr("fill","red");
                    d3.select("#sentBar" + element).attr("fill","red");
                    d3.select("#bizBar" + element).attr("fill","red");
                });
        }
    }