javascript - 第二个 While 循环返回一个实例

Question

下面的代码只是我整个代码的一个片段，我遇到的问题是第一个 while 循环返回所有实例，但第二个 while 循环只返回一个实例。我试过把它们放在不同的功能中，但这没有帮助，有人可以帮忙吗？

    function refreshCurveData() {
    selectedDate = document.querySelectorAll(".buyclass .column-date.sorting_1")[1].textContent;
    buyPriceTable = document.querySelectorAll(".buyclass td.column-price");
    buyVolTable = document.querySelectorAll(".buyclass td.column-volume");

    sellPriceTable = document.querySelectorAll(".sellclass td.column-price");
    sellVolTable = document.querySelectorAll(".sellclass td.column-volume");

    let i = 0;
    do {
        var buyPriceData1 = buyPriceTable[i].textContent;
        var buyVolData1 = buyVolTable[i].textContent;

        buyPriceData[i] = {
            x: parseFloat(buyPriceData1.replace(/\,/g, '')),
            y: parseFloat(buyVolData1.replace(/\,/g, ''))
        };
        i++;
    }        
    while (document.querySelectorAll(".buyclass .column-date.sorting_1")[i].textContent === selectedDate);

    let j = 0;
    do {    
        var sellPriceData1 = sellPriceTable[j].textContent;
        var sellVolData1 = sellVolTable[j].textContent;

        sellPriceData[j] = {
            x: parseFloat(sellPriceData1.replace(/\,/g, '')),
            y: parseFloat(sellVolData1.replace(/\,/g, ''))
        };

        j++;
    }
    while (document.querySelectorAll(".sellclass .column-date.sorting_1")[j].textContent === selectedDate);
}

setInterval(() => {
    refreshCurveData();
    scatterChart.update();

}, 2500);

标签： javascriptarrayswhile-loopdo-while