jquery sparkline中在未加载的DOM元素中无法显示图标

How do I draw a sparkline on an element that is not yet in the DOM?

You need to know two things:
The element you create must have some initial content, even if it's just  
After the element is inserted into the DOM (and visible), you must call 

$.sparkline_display_visible()

 to actually display it

Eg.

// create an element and draw a sparkline
var barchart = $('<span> </span>');
barchart.sparkline([1,2,3,2], {type: 'bar'});
// insert the element somewhere into the DOM
$('#mycharts').append(barchart);
// actually render any undrawn sparklines that are now visible in the DOM
$.sparkline_display_visible();