jquery - On Chrome and Opera, mousedown action on a selector control causes mousedown and mouseup events to fire -


i’m developing javascript-based web app displays various times series of weather data on tab. time series displayed on tab controlled select control id = tempvarselect. changes tempvarselect control meant execute changetempdisplay(), hides , shows time series graph on tab. changetempdisplay() function bound changes in tempvarselect via jquery mouseup event:

  $("#tempvarselect").mouseup(function( ){ changetempdisplay();      });      function changetempdisplay(){      var tempvar = number(document.getelementbyid("tempvarselect").value);       switch (tempvar)      {       case 0:         console.log(" temp_display = " + tempvar);         $("#tmaxgraph").show();         $("#tmaxlabels").show();         $("#tmingraph").hide();         $("#tminlabels").hide();          plottmax();        break;       case 1:         console.log(" temp_display = " + tempvar);         $("#tmaxgraph").hide();         $("#tmaxlabels").hide();         $("#tmingraph").show();         $("#tminlabels").show();          plottmin();        break;       }      }

this works safari , firefox, i.e. mousedown-mousemove-mouseup sequence on tempvarselect selector causes graph type selected on mouseup display properly.

but on chrome , opera changetempdisplay appears fire on mousedown, causing current time series display re-plotted , tempvar number selected on mousedown echoed console.log. result, there no change display. mousemove , mouseup causes tempvarselect selector assign correct tempvar value , highlight correct selected variable on mouseup, because changetempdisplay fires on mousedown, there no change time series display. when mousedown on tempvarselect after that, changetempdisplay fires changed value of tempvar, , display changes new time series should.

by conducting simplified test echoes mousedown , mouseup times console.log, i.e.

var time0 = new date().gettime();

  $("#tempvarselect").bind("mouseup",function( ){     time = new date().gettime() - time0;     console.log(" tempvarselect mouseup @ t = " + time);         });    $("#tempvarselect").bind("mousedown",function( ){     time = new date().gettime() - time0;     console.log(" tempvarselect mousedown @ t = " + time);         });

i’ve found happening mousedown action triggers mousedown-mouseup sequence in chrome, mousedown in safari , firefox. result, changetempdisplay() fires on mousedown action in chrome.

i’ve checked out similar problems (e.g., jquery mouseup not being detected correctly ), don’t seem apply i’m seeing.

does have idea why occur?


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