未捕获的TypeError:..不是javascript中的函数

问题描述

我正在尝试使用d3.js绘制折线图.

I am trying to use d3.js to draw line chart.

function lineChart(){
    ...
}

function update(){
    ...
    var lineChart = lineChart()
        .x(d3.scale.linear().domain([2011, 2014]))
        .y(d3.scale.linear().domain([0, 1000000]));
    ...
}

但是控制台显示Uncaught TypeError: lineChart is not a function.
该如何解决?

But the console says that Uncaught TypeError: lineChart is not a function.
How to fix this?

推荐答案

您正在屏蔽函数.

当您声明另一个变量/函数与上一个变量的名称相同时，会发生这种情况.您应该做的就是给第二个声明起另一个名字，就像@andlrc在他的评论中说的那样.

This happens when you declare another variable/function with the same name of an upper one. What you should do is to give another name to the second one declaration just like @andlrc says in his comment.

var lineChartResult = lineChart()...

您可以在此处了解有关阴影的更多信息:设置&阴影属性

You can learn more about shadowing in here: Setting & Shadowing Properties

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