javascript - chrome extension: saving data attribute in background from popup -


background.js

function getframe() {   // popup.js can access background's frame function   return $('iframe')[0]; }  function updatestatus(status) {   // popup.js should call function update frame's status   var frame = $('iframe')[0];   $(frame).data('status', status); }

popup.js

..dom ready var bg = chrome.extension.getbackgroundpage(); ('.hello').click(function () {   bg.updatestatus('ready') } // <assume above event has been triggered here> var frame = bg.getframe(); console.log($(frame).data('status')) // undefined <- however, result

i trying store status in background's frame retrieve when popup re-opens. however, above result. explain why happening? missing data attributes?

i figured out solution. instead of retrieving frame element popup, had following:

background.js

function getstatus() {   // popup.js must retrieve current status way   // $(bg.getframe()).data('status') bad   var frame = $('iframe')[0];   return $(frame).data('status'); }

could add why happening?


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