css - How to smoothly load 10 csv files of 500kb each and merge the array with javascript and HTML5? -


given 10 csv files under same directory, same format, different values. each file size 500kb.

   mergeddata = []     (f in filelist) {      d3.tsv(f, function(error, data)){        //following code cannot work expected       mergeddata = mergeddata.concat(data)        //then plot d3js using mergeddata       ...      }    }

i use these data visualization d3, , aware javascript single threading.

the solution might web workers, can run in backend. based on http://www.w3schools.com/html/html5_webworkers.asp

since web workers in external files, not have access following javascript objects:

the window object document object parent object

there libraries around support asynchronous loading of files. 1 of developed maker of d3.js, mike bostock. take @ queue.js rather slim , lightweight. if not fit needs, there other libraries linked on queue.js page.


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