如何通过 DOM 容器访问高图表？

当我向 div 容器呈现一个高度图表时，如何通过 div-Container 访问图表对象？

我不想让图表变成全局变量。

        var chart = new Highcharts.Chart({
chart: {
renderTo: "testDivId",
...

我想像下面这样访问上下文之外的图表(伪代码) ，调用函数:

var chart = Highcharts.Chart("testDivId"); //access from id
chart.redraw();
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var chart1; // globally available
$(document).ready(function() {
chart1 = new Highcharts.Chart({
chart: {
renderTo: 'container',
type: 'bar'
},
title: {
text: 'Fruit Consumption'
},
xAxis: {
categories: ['Apples', 'Bananas', 'Oranges']
},
yAxis: {
title: {
text: 'Fruit eaten'
}
},
series: [{
name: 'Jane',
data: [1, 0, 4]
}, {
name: 'John',
data: [5, 7, 3]
}]
});
});

The var chart1 is global so you can use to access de highchart object doesnt matter wich is the container

chart1.redraw();
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最佳答案

Highcharts 3.0.1

Users can use the highcharts plugin

var chart=$("#container").highcharts();

Highcharts 2.3.4

Read from the Highcharts.charts array, for version 2.3.4 and later, the index of the chart can be found from the data on the <div>

 var index=$("#container").data('highchartsChart');
var chart=Highcharts.charts[index];

All versions

Track charts in a global object/map by container id

var window.charts={};
function foo(){
new Highcharts.Chart({...},function(chart){
window.charts[chart.options.chart.renderTo] = chart;
});
}


function bar(){
var chart=window.charts["containerId"];
}

Read Mode @ Highcharts Tips - Accessing Chart Object From a Container ID

P.S.

Some additions were made in the newer versions of Highcharts since writing this answer and have been taken from answers from @davertron, @Nerdroid and @Frzy, please upvote their comments/answers as they deserve the credit for these. Adding them here as this accepted answer would be incomplete without these

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you can do this 

var chart = $("#testDivId").highcharts();

check example on fiddler

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var $chartCont = $('#container').highcharts({...}),
chartObj = Highcharts.charts[$chartCont.data('highchartsChart')];

chartCont is jQuery Object. chartObj is Highchart Chart Object.

This is using Highcharts 3.01

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I found another way of doing it... mainly because I'm using Highcharts that are embedded in OutSystems Platform, and I don't have a way to control the way charts are created.

The way that I found was the following:

  1. Give an identifying class to the chart using className attribute

    chart: {
className: 'LifeCycleMasterChart'
}

  2. Define an auxiliary function to get the chart by class name

    function getChartReferenceByClassName(className) {
var cssClassName = className;
var foundChart = null;


$(Highcharts.charts).each(function(i,chart){
if(chart.container.classList.contains(cssClassName)){
foundChart = chart;
return;
}
});


return foundChart;

    }

  3. Use the auxiliary function wherever you need it

    var detailChart = getChartReferenceByClassName('LifeCycleDetailChart');

Hope it helps you!

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... and with the help of a colleague... a better way to do it is... 

getChartReferenceByClassName(className) {
var foundChart = $('.' + className + '').eq(0).parent().highcharts();


return foundChart;
}
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Without jQuery (vanilla js):

let chartDom = document.getElementById("testDivId");
let chart = Highcharts.charts[Highcharts.attr(chartDom, 'data-highcharts-chart')]
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Simply with pure JS :

var obj = document.getElementById('#container')
Highcharts.charts[obj.getAttribute('data-highcharts-chart')];
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@elo's answer is correct and upvoted, though I had to tidy it a little to make it clearer:

const myChartEl = document.getElementById('the-id-name');
const myChart = Highcharts.charts[myChartEl.getAttribute('data-highcharts-chart')];

myChart then becomes a live Highcharts object that exposes all current props present in the chart that's rendered in the myChartEl. Since myChart is a Highcharts object, one can chain prototype methods right after it, extend it or refer to it.

myChart.getTable();
myChart.downloadXLS();
setTimeout(() => Highcharts.fireEvent(myChart, "redraw"), 10);

One can also get myChart through .highcharts(), which is a jQuery plugin:

var myChart = $("#the-id-name").highcharts();

The jQuery plugin approach above requires jQuery to be loaded before the plugin is used, and of course the plugin itself. It was the absence of this plugin that got me into looking for alternative ways to accomplish the same with pure vanilla JavaScript.

By using the pure JS approach I was able to do what I needed (the second code snippet) without having to rely on jQuery:


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