/**
* 获取一个新的chart配置项
* @param color rgba颜色
* @param type 图表类型:line,bar,radar,polarArea,pie,doughnut
* @param title 显示图表的标题
* @param label 图表的标签，鼠标移到图表某个数据点时显示的提示文字
* @param categories 一般是X轴的内容
* @param data 一般是Y轴的数据
* @returns 返回图表的配置参数
*/
function getNewConfig(color,type,title,label,categories,data)
{
var background = color;
var config = {
type: type,
options: {
responsive: true,
legend: {
display: false,
position:'bottom'
},
hover: {
mode: 'label'
},
scales: {
xAxes: [{
display: true,
scaleLabel: {
display: false,
labelString: 'Month'
}
}],
yAxes: [{
display: true,
scaleLabel: {
display: false,
labelString: 'Value'
}
}]
},
title: {
display: true,
text: title
}
}
};
var dataset = {
label: label,
data: data,
fill: false,
borderDash: [, ],
borderColor : background,
backgroundColor : background,
pointBorderColor : background,
pointBackgroundColor : background,
pointBorderWidth : 
};
var data = {
labels:categories,
datasets: [dataset]
};
config.data = data;
return config;
}

<canvas id="chart_weixinmember" height=""></canvas> 
var color = 'rgba(,,,.)';
var categories = ["--","--","--","--","--","--","--"];
var data = [,,,,,,];
var config = getNewConfig(color,'line','最近天微信会员增长情况','当天新增微信会员',categories,data);
var ctx = document.getElementById("chart_weixinmember").getContext("d");
var weixinMemberCountChart = new Chart(ctx, config);