未捕獲Rickshaw.Graph需要的元素

Question

基準需要一些幫助此錯誤：

Uncaught Rickshaw.Graph needs a reference to an element 
rickshaw.min.js:1 initialize 
rickshaw.min.js:1 Rickshaw.Graph 
rickshaw.min.js:1 loadChart 
chart.js:23 (anonymous function) 
stockDisplay.html:21 window.DoorLock.DoorLock._tryToFreeWaitList 
onsenui.js:4123 window.DoorLock.DoorLock._unlock 
onsenui.js:4118 unlock 
onsenui.js:4100 (anonymous function) 

這裏是JS功能：

功能loadChart（）{

var stockDataSeries = (function() { 
    var stockDataSeries = null; 
    $.ajax({ 
     'async': false, 
     'global': false, 
     'url': 'http://[host_name]/json/aa_historicalData.json', 
     'dataType': "json", 
     'success': function (data) { 
     stockDataSeries = JSON.stringify(data); 
     }, 
     'error': function(xhr, ajaxOptions, thrownError){ 
      alert(xhr.status); 
      alert(thrownError); 
     } 
    }); 
    return stockDataSeries; 
})(); 

var stockChart = new Rickshaw.Graph({ 
    element: document.querySelector('chart'), 
    renderer: 'line', 
    width: '345', 

    series: [ { 
      color: 'steelblue', 
      name: 'Price', 
      data: stockDataSeries   
       } ] 
}); 

var x_axis = new Rickshaw.Graph.Axis.X({ 
    graph: stockChart 
}); 

var y_axis = new Rickshaw.Graph.Axis.Y({ 
    graph: stockChart, 
    orientation: 'left', 
    tickFormat: Rickshaw.Fixtures.Number.formatKMBT, 
    element: document.getElementById('y_axis') 
}); 

var detail = new Rickshaw.Graph.HoverDetail({ 
     graph: stockChart 
}); 

graph.render();  

}

Answer 1

而不是使用document.querySelector('chart')嘗試使用document.getElementById('chart')。我相信你的錯誤是由沒有元素的querySelector返回的。