无法拆分对象属性

Question

我试图通过将字符串包装在tspan标记中来包装svg标签。

我的问题是当split（）发生时属性不起作用。我的对象似乎不在函数内部工作，但它似乎在控制台中工作。 d.text在控制台中返回，但就在函数内部工作而言，某些东西已关闭。

 function wrap(text, width) {
        text.each(function (d) {

            console.log("is d.text defined?"  + d.text /* this gets returned ok - logs all the d.text*/)
            wordwrap = ( function (){return "These are long labels" /*hardcoded label strings: this gets returned ok*/})
            wordwrap = ( function (){return d.text; /* undefined is not a function */})
            wordwrap = d.text; /* number is not a function */


            var text = d3.select(this),
                words = wordwrap().split(/\s+/).reverse(),
                word,
                line = [],
                lineNumber = 0,
                lineHeight = 1.1, // ems
                x = text.attr("x"),
                y = text.attr("y"),
                dy = 0, //parseFloat(text.attr("dy")),
                tspan = text.text(null)
                    .append("tspan")
                    .attr("x", x)
                    .attr("y", y)
                    .attr("dy", dy + "em");
            while (word = words.pop()) {
                line.push(word);
                tspan.text(line.join(" "));
                if (tspan.node().getComputedTextLength() > width) {
                    line.pop();
                    tspan.text(line.join(" "));
                    line = [word];
                    tspan = text.append("tspan")
                        .attr("x", x)
                        .attr("y", y)
                        .attr("dy", ++lineNumber * lineHeight + dy + "em")
                        .text(word);
                }

                console.log(d.text) /* this gets returned ok*/
            }
        });
    }