Beginners ask questions about echarts asynchronous calls.

I process this data asynchronously and display it, putting the data0 data into the file abc.json. How to deal with this, and do you put these in asynchrony with name: "MA5" when calling asynchrony? You can still load it first. Asynchronism only needs to fill in the data. I haven"t solved it for a long time. We can only ask questions. By the way, can I put the code in XXX.JS?

when I load it with < script scr= "xxx.js" > < / script > in XXX.JS, the first sentence of
var myChart = echarts.init (document.getElementById ("main")," light");
reports why the error is.

Please approve. Thank you very much

official source code.

var upColor ="- sharpec0000";
var upBorderColor ="- sharp8A0000";
var downColor ="- sharp00da3c";
var downBorderColor ="- sharp008F28";

/ / data meaning: opening (open), closing (close), lowest (lowest), highest (highest)
var data0 = splitData ([

] 
["2013/1/24", 2320.26,2320.26,2287.3,2362.94],
["2013/1/25", 2300,2291.3,2288.26,2308.38],
["2013/1/28", 2295.35,2346.5,2295.35,2346.92],
["2013/1/29", 2347.22,2358.98,2337.35,2363.8],
["2013/1/30", 2360.75,2382.48,2347.89,2383.76],
["2013/1/31", 2383.43,2385.42,2371.23,2391.82],
["2013/2/1", 2377.41,2419.02,2369.57,2421.15],
["2013/2/4", 2425.92,2428.15,2417.58,2440.38],
["2013/2/5", 2411,2433.13,2403.3,2437.42],
["2013/2/6", 2432.68,2434.48,2427.7,2441.73],
["2013/2/7", 2430.69,2418.53,2394.22,2433.89],
["2013/2/8", 2416.62,2432.4,2414.4,2443.03],
["2013/2/18", 2441.91,2421.56,2415.43,2444.8],
["2013/2/19", 2420.26,2382.91,2373.53,2427.07],
["2013/2/20", 2383.49,2397.18,2370.61,2397.94],
["2013/2/21", 2378.82,2325.95,2309.17,2378.82],
["2013/2/22", 2322.94,2314.16,2308.76,2330.88],
["2013/2/25", 2320.62,2325.82,2315.01,2338.78],
["2013/2/26", 2313.74,2293.34,2289.89,2340.71],
["2013/2/27", 2297.77,2313.22,2292.03,2324.63],
["2013/2/28", 2322.32,2365.59,2308.92,2366.16],
["2013/3/1", 2364.54,2359.51,2330.86,2369.65],
["2013/3/4", 2332.08,2273.4,2259.25,2333.54],
["2013/3/5", 2274.81,2326.31,2270.1,2328.14],
["2013/3/6", 2333.61,2347.18,2321.6,2351.44],
["2013/3/7", 2340.44,2324.29,2304.27,2352.02],
["2013/3/8", 2326.42,2318.61,2314.59,2333.67],
["2013/3/11", 2314.68,2310.59,2296.58,2320.96],
["2013/3/12", 2309.16,2286.6,2264.83,2333.29],
["2013/3/13", 2282.17,2263.97,2253.25,2286.33],
["2013/3/14", 2255.77,2270.28,2253.31,2276.22],
["2013/3/15", 2269.31,2278.4,2250,2312.08],
["2013/3/18", 2267.29,2240.02,2239.21,2276.05],
["2013/3/19", 2244.26,2257.43,2232.02,2261.31],
["2013/3/20", 2257.74,2317.37,2257.42,2317.86],
["2013/3/21", 2318.21,2324.24,2311.6,2330.81],
["2013/3/22", 2321.4,2328.28,2314.97,2332],
["2013/3/25", 2334.74,2326.72,2319.91,2344.89],
["2013/3/26", 2318.58,2297.67,2281.12,2319.99],
["2013/3/27", 2299.38,2301.26,2289,2323.48],
["2013/3/28", 2273.55,2236.3,2232.91,2273.55],
["2013/3/29", 2238.49,2236.62,2228.81,2246.87],
["2013/4/1", 2229.46,2234.4,2227.31,2243.95],
["2013/4/2", 2234.9,2227.74,2220.44,2253.42],
["2013/4/3", 2232.69,2225.29,2217.25,2241.34],
["2013/4/8", 2196.24,2211.59,2180.67,2212.59],
["2013/4/9", 2215.47,2225.77,2215.47,2234.73],
["2013/4/10", 2224.93,2226.13,2212.56,2233.04],
["2013/4/11", 2236.98,2219.55,2217.26,2242.48],
["2013/4/12", 2218.09,2206.78,2204.44,2226.26],
["2013/4/15", 2199.91,2181.94,2177.39,2204.99],
["2013/4/16", 2169.63,2194.85,2165.78,2196.43],
["2013/4/17", 2195.03,2193.8,2178.47,2197.51],
["2013/4/18", 2181.82,2197.6,2175.44,2206.03],
["2013/4/19", 2201.12,2244.64,2200.58,2250.11],
["2013/4/22", 2236.4,2242.17,2232.26,2245.12],
["2013/4/23", 2242.62,2184.54,2182.81,2242.62],
["2013/4/24", 2187.35,2218.32,2184.11,2226.12],
["2013/4/25", 2213.19,2199.31,2191.85,2224.63],
["2013/4/26", 2203.89,2177.91,2173.86,2210.58],
["2013/5/2", 2170.78,2174.12,2161.14,2179.65],
["2013/5/3", 2179.05,2205.5,2179.05,2222.81],
["2013/5/6", 2212.5,2231.17,2212.5,2236.07],
["2013/5/7", 2227.86,2235.57,2219.44,2240.26],
["2013/5/8", 2242.39,2246.3,2235.42,2255.21],
["2013/5/9", 2246.96,2232.97,2221.38,2247.86],
["2013/5/10", 2228.82,2246.83,2225.81,2247.67],
["2013/5/13", 2247.68,2241.92,2231.36,2250.85],
["2013/5/14", 2238.9,2217.01,2205.87,2239.93],
["2013/5/15", 2217.09,2224.8,2213.58,2225.19],
["2013/5/16", 2221.34,2251.81,2210.77,2252.87],
["2013/5/17", 2249.81,2282.87,2248.41,2288.09],
["2013/5/20", 2286.33,2299.99,2281.9,2309.39],
["2013/5/21", 2297.11,2305.11,2290.12,2305.3],
["2013/5/22", 2303.75,2302.4,2292.43,2314.18],
["2013/5/23", 2293.81,2275.67,2274.1,2304.95],
["2013/5/24", 2281.45,2288.53,2270.25,2292.59],
["2013/5/27", 2286.66,2293.08,2283.94,2301.7],
["2013/5/28", 2293.4,2321.32,2281.47,2322.1],
["2013/5/29", 2323.54,2324.02,2321.17,2334.33],
["2013/5/30", 2316.25,2317.75,2310.49,2325.72],
["2013/5/31", 2320.74,2300.59,2299.37,2325.53],
["2013/6/3", 2300.21,2299.25,2294.11,2313.43],
["2013/6/4", 2297.1,2272.42,2264.76,2297.1],
["2013/6/5", 2270.71,2270.93,2260.87,2276.86],
["2013/6/6", 2264.43,2242.11,2240.07,2266.69],
["2013/6/7", 2242.26,2210.9,2205.07,2250.63],
["2013/6/13", 2190.1,2148.35,2126.22,2190.1]

]);

function splitData (rawData) {

var categoryData = [];
var values = []
for (var i = 0; i < rawData.length; iPP) {
    categoryData.push(rawData[i].splice(0, 1)[0]);
    values.push(rawData[i])
}
return {
    categoryData: categoryData,
    values: values
};

}

function calculateMA (dayCount) {

var result = [];
for (var i = 0, len = data0.values.length; i < len; iPP) {
    if (i < dayCount) {
        result.push("-");
        continue;
    }
    var sum = 0;
    for (var j = 0; j < dayCount; jPP) {
        sum += data0.values[i - j][1];
    }
    result.push(sum / dayCount);
}
return result;

}

option = {

title: {
    text: "",
    left: 0
},
tooltip: {
    trigger: "axis",
    axisPointer: {
        type: "cross"
    }
},
legend: {
    data: ["K", "MA5", "MA10", "MA20", "MA30"]
},
grid: {
    left: "10%",
    right: "10%",
    bottom: "15%"
},
xAxis: {
    type: "category",
    data: data0.categoryData,
    scale: true,
    boundaryGap : false,
    axisLine: {onZero: false},
    splitLine: {show: false},
    splitNumber: 20,
    min: "dataMin",
    max: "dataMax"
},
yAxis: {
    scale: true,
    splitArea: {
        show: true
    }
},
dataZoom: [
    {
        type: "inside",
        start: 50,
        end: 100
    },
    {
        show: true,
        type: "slider",
        y: "90%",
        start: 50,
        end: 100
    }
],
series: [
    {
        name: "K",
        type: "candlestick",
        data: data0.values,
        itemStyle: {
            normal: {
                color: upColor,
                color0: downColor,
                borderColor: upBorderColor,
                borderColor0: downBorderColor
            }
        },
        markPoint: {
            label: {
                normal: {
                    formatter: function (param) {
                        return param != null ? Math.round(param.value) : "";
                    }
                }
            },
            data: [
                {
                    name: "XX",
                    coord: ["2013/5/31", 2300],
                    value: 2300,
                    itemStyle: {
                        normal: {color: "rgb(41,60,85)"}
                    }
                },
                {
                    name: "highest value",
                    type: "max",
                    valueDim: "highest"
                },
                {
                    name: "lowest value",
                    type: "min",
                    valueDim: "lowest"
                },
                {
                    name: "average value on close",
                    type: "average",
                    valueDim: "close"
                }
            ],
            tooltip: {
                formatter: function (param) {
                    return param.name + "<br>" + (param.data.coord || "");
                }
            }
        },
        markLine: {
            symbol: ["none", "none"],
            data: [
                [
                    {
                        name: "from lowest to highest",
                        type: "min",
                        valueDim: "lowest",
                        symbol: "circle",
                        symbolSize: 10,
                        label: {
                            normal: {show: false},
                            emphasis: {show: false}
                        }
                    },
                    {
                        type: "max",
                        valueDim: "highest",
                        symbol: "circle",
                        symbolSize: 10,
                        label: {
                            normal: {show: false},
                            emphasis: {show: false}
                        }
                    }
                ],
                {
                    name: "min line on close",
                    type: "min",
                    valueDim: "close"
                },
                {
                    name: "max line on close",
                    type: "max",
                    valueDim: "close"
                }
            ]
        }
    },
    {
        name: "MA5",
        type: "line",
        data: calculateMA(5),
        smooth: true,
        lineStyle: {
            normal: {opacity: 0.5}
        }
    },
    {
        name: "MA10",
        type: "line",
        data: calculateMA(10),
        smooth: true,
        lineStyle: {
            normal: {opacity: 0.5}
        }
    },
    {
        name: "MA20",
        type: "line",
        data: calculateMA(20),
        smooth: true,
        lineStyle: {
            normal: {opacity: 0.5}
        }
    },
    {
        name: "MA30",
        type: "line",
        data: calculateMA(30),
        smooth: true,
        lineStyle: {
            normal: {opacity: 0.5}
        }
    },

]

};

topic description

sources of topics and their own ideas

related codes

/ / Please paste the code text below (do not replace the code with pictures)

what result do you expect? What is the error message actually seen?

Javascript
Jun.17,2021

var myChart = echarts.init (document.getElementById ('main'),' light');
generally reports an error because the element of id='main' is not found on the page.
when calling asynchronously, you can do this: 

var result=[];
var option={
    ...,
    series:[
        {
            ...,
            data:result
        }
    ]
};
asyncres.get(function(data){
    result=data;
    myChart.setOption(option,true);
});

declare an empty array var result= [] first, and write data:result to series directly in option.
when the asynchronous call ends, assign a value to result, and then execute myChart.setOption (option,true) again;

what is your actual error report without seeing it? Is echarts not introduced? Does DOM not exist? Asynchronous means the setOption method assignment.

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